I sold more HT4100 cars than I can count. They were quiet when cold and the minute they warmed up they got noisy. I knew a salesman that used to hide in the back when his customers came back into the dealership. The motors would knock after 500 miles. I loved those cars because it made the "Cadillac" cheaper than the olds and buicks at the auction and I used to snap them up cheap and sell em to the natives in Flushing....ah you brought back good and bad memories from the good old days lol. That motor was a little better than the 4 6 8 motor from I think '81 wow...
@@atx-cvpi_99 I agree. The 4-6-8 was the last REAL Cadillac engine, the 368. It wasn't a powerhouse but at least durable. Like many have said, just deactivate the cylinder drop out. I think there was a way through the climate control panel or the mileage readout to go into the program mode. You could do it from inside the car.
Crazy how infamous these engines are, My 1984 Cadillac Seville still has the original 4.1 in it from the factory and just keeps going and going for miles. I must be lucky as hell.
@@UsefulEntertainment So far it shows no signs of stopping anytime soon, put 142k miles on it and keep hustling. Been a good reliable daily driver believe it or not.
I worked on these engines back in the 80s and the anti freeze would actually seep through the porous aluminum block. You would satisfy this repair campaign by dropping a leak stopper pellet into the radiator. Never bought a GM after seeing this and other nightmares.
@@DUCKSAREEVILLLLLLLL G.M. wouldn't ever admit that and the customer never knew about the pellets. G.M. only cared about getting the vehicles through the warranty period, scumbags. I'd never buy a G.M. vehicle.
@@gregoryl8374 All corporations are like that. Far more Huyandais and Kias are catching on fire than GM Fieros ever did. All the old, classic Grumman USPS vehicles you see on the road have GM Iron Duke engines in them, despite the trucks being out of production since 1994. They're dogs, but reliable.
My dad's Eldorado never gave him any trouble. Maybe it was lighter than the Seville and was easier on the engine. Mostly freeway miles too. I still have it but it's been sitting for....oof, 30 years. Ha, I should make my first video and try to get it started.
An ex-coworker of mine purchased a brand new 84 Eldorado in 84. This car had the 4.1 v8 engine. He and his wife were driving to Las Vegas from Los Angeles when the car was three months old. He told me he was driving along @ 70 mph approaching Zyzzx road. He said all of a sudden there was a horrible noise and the engine stopped. What happened was the crank shaft broke in two different places. He did not keep the caddy to much longer after that. The best engine for the Eldorado was the Oldsmobile 350 V8 which was installed in the 1979 Eldorado. Cadillac used that engine in just the 79' model year. They fuel injected that engine with the throttle body injection system. But it had a measly 170 hp. Cadillac really screwed up and ruined a great car with that 4.1 V8.
I agree, he's been there / done that. I'm glad I could give him a moment to get his word out because it seems these demon engines flew under the trash radar for a long time.
I knew the 4-6-8 were trash, but did not know the 4100 was such junk..... I love how your Pa threw in there "it's just two Vega engines slapped together"... Since I know the Vega had the same basic Aluminum/cast iron mix blunder... And I didnt know the "Norstar" was junk to... Loved the Cadi's from the 80's, but would be best to throw a reliable 350 in one.... @@UsefulEntertainment
@@andrewandres148 he said the 8 6 4 motors ran fine, you just had to unplug the solenoids above each cylinder so it would run on all 8 all the time. Yup, v8 Vega motor lol. A lot of cars got engine swaps back in the 80s to my understanding. Chevy motors, Pontiac, olds, you name it, people would jam them under the hoods of Cadillacs.
I had the HT 4100 in a 1983 Coupe DeVille. The car was great overall, but the engine was not designed to be in a large rear-wheel drive car like that as it was pretty slow. I fortunately never did have problems with the engine as it was rebuilt before I bought it by someone who must have known what they were doing. I got it to 160k miles before the frame started to rust out on me.
Yup, everything he said. It was mostly the combination of dissimilar material and the expansion rates that eventually caused seal leaks. I had an absolutely gorgeous 1984 Eldorado Biarritz in black with red leather interior. Bought it from a Caddy mechanic that raided his dealers parts dept and restored it using GM parts, rebuilt the engine. Engine locked up a year after I bought it. I think it was an intake leak. Oil looked like shit. I had 2 of those. The first '84 was an ETC formerly owned by the Pres of Bank of America in Houston. It had stamped steel valve covers. The second one had those aluminum valve covers. Mine had a really weird stinky exhaust when cold with a touch of smoke. After I got rid of it, about 12 years later way east of Cleveland I found some guy selling a super nice '84 or '85 Eldo balck with black interior. Aluminum wheels. maybe 54-56k orig miles. Absolutely beautiful car. Reminded me of my old one but not a Biarritz. He bought it off some elderly neighbors that split time between there and Florida. While I was checking it out I smelled that same stinky oily exhaust, and said "Nah, sorry, it's a beuatiful car but I'd have to have rocks in my head to buy another one of these." That one had the digital dash too. One other thing about those cars was they had to make a special version of that transmission with an extra low first gear the engine was so under powered. That would have been a hell of a car with a 368 or Olds 350. The best engine they ever had in those was the early Seville with the fuel injected Olds 350. Back then the Seville was the most expensive Cad even over the Fleetwood. I'd probably take a 350 diesel over the HT4100. I had 3 of those diesels and got all of them running pretty good.
My dad had an 87 coupe de ville with this engine and we drove it from Los Angeles to Queens NYC back in 2003. The car was misfiring from the start and would struggle going up the Colorado mountains. It also almost left us stranded in the middle of nowhere on route 66.
I have an 85 seville with a trashed out 4100. I’m looking to swap it out with something more reliable, not too worried about making a bunch of power tho. What would yall recommend? I had an old timer tell be the easiest thing to do would be a 307 from a 1979-1984 toronado, el dorado or riviera. Can’t really find much info but what I have found “seems to” confirm this. Anyway, what do y’all think?
What happened with the earlier Cadillac 4.1 V8s? Lack of heat treatment or improper heat treatment on some components? That really makes the 4.3 V6s look like an upgrade! (a.k.a. "4300" and "262 CI") (The V6 that the Chevy Astro/GMC Safari regularly had)
He is somewhat right but somewhat being excessive. I have a 1985 Cadillac Eldorado and it has this engine. It is running perfect and strong at 130,000 not even a check engine light.
Did your dad leave the Cadillac dealership before they came up with a fix for the leaking intake gaskets? My parents had an 85 Eldo and it had the 4100 in it. My neighbor was a Cadillac engine mechanic at a Caddy dealership back in the day when these were new cars. He asked me if it had the cam replaced yet and I asked him why they would. He told me about the problems that were associated with the 4100 and said that there was a fix. It was to use special belleville washers on the intake bolts to allow for a bit of movement between the head and intake manifold when it heated up and cooled down. He ended up doing the repairs on it including the cam and lifters that were already starting to show wear and it ran fine for many years after that.
I got very lucky with my 84 Fleetwood.. The HT4100 out lasted 3 transmissions. Had right at 300,000 miles on it when the last transmission went out and I didn't repair it. But the engine ran fine. Maybe it got a new engine very early on. But no complaints from me on it.
I was shocked they used that engine in the Fleetwood. They usually used a more 'traditional' V8 in the Fleetwood like the Cad 368 or 429 or even other divisions engines. The last ones used the 307 or Chev engines.
lol I was thinking of selling my Lincoln to get an 83 Cadillac, but your dad was saying Hulk Hogan did the opposite 😂 might have to stick with the Lincoln unless I want to stick an LS in the caddy
Greetings from Germany! I got a 1984 DeVille with that engine and i love it! Its garbage i already put like 10k into the engine but whatever 😂 Its a nice car and i will always fix it. Mine got 100k miles on it
I have troble getting on the Autobahn because it soooo slow. Transmission wants to downshift all the time 😂 Even in town you have trouble getting along. Its impossible to pass someone
I’m saying this just to see what you will say, I own a 1991 Chrysler New Yorker Fifth Avenue mark cross edition as a daily driver. I genuinely have had decent reliability with it too
EWWW I had to look up what a 91 looks like, Its like a K car Newyorker but by Cadillac haha... No offence but we gotta get you another set of wheels. on another note, i have heard slightly better things about the 4.9
I had all those motors. The 368 in an 81 Eldo that was converted. I really liked that car. The biggest issue that I had was the 3 speed auto. The car needed an overdrive. The gas mileage was terrible. 9 in the city 14 highway. the 83 Coupe DeVille with the 4100 lasted 10 years and 123,000 miles before a failed MAT sensor and a spun bearing did it in. I hit 17/25 mpg. My 90' Coupe was my favorite. It had the 200 HP 4.5. It was ridiculous off the line. It was faster off the line than my 88 Corvette. The gas mileage wasn't as good as the 83.
Worked at a Pontiac Cadillac dealership during these "horror years". Swear to God, the owner rented an off site shop, put two heavy line techs in it, paid them a premium on flat rate, hired a retired gentleman part time to run parts, etc. why, because the main shop was literally filled with Cadillacs with the hoods on the roof and empty engine compartments and did not want customers seeing this!!! Of course, salesmen kept selling them. Ahh, memories.😊
yes it would go right in its place, wether its a b body rwd or an e body fwd, the buicks and olds versions used olds 307s or buick 3.8s, it all swaps around
Makes you wonder how many resources total were wasted in order to rush and save the resources used in 1 or 2 mpg. Far more than was saved, just like with the crap they do now start/stop and cylinder deactivation. Nobody is allowed to figure in that it takes the equivalent of losing 15 mpg to gain 10. Including all the extra parts, research, increased maintenance and shorter engine life. Creating all the replacement parts and shipping them as well which in the case of the 4100 entire engines is absolutely massive.
I worked on tons of those turds back in the 80's and early 90's. They were total crap. I don't think any of them lasted more than 2 or 3 years. They ate head gaskets like a fat guy at a Chinese buffet. I don't care how many fanbois want to make apologies for the 4100, they are not even worth using as a urinal.
I wonder how many owners demanded anything other than a 4100 as a replacement engine; I'm sure the V6, or a 305, or even a 454 would have cost less to make than one of these. It would be interesting to see what Caddy did to make the later 4100s, as well as the 4.5 and 4.9 more solid.
If it were that easy I would have dropped in almost ANYTHING to replace that engine. You'd have to change the trans and a lot of other stuff. Exhaust, cooling, mounts, AC bracketing. If you were really into the car it could be done. A lot of work.
9 some of the cars had beautiful bodies, we had a El Dorado barits on a maple fireworks white top white leather red carpet bows dual power seat recliners true spoke wheels it had every option what was the fix pull the ht4100 out, what do you put back in? Did anybody come up with a solution?
the dealers had to replace the cam while the motor was in the car if it was just the cam that went bad but the other times they just replaced the engines.
I have one that has 170,000 miles on it in a 83 coupe de ville that was my grandfather's. I guess he got one of the few good ones. Even so, you have to pray that it gets up to hiway speed before trying to merge into traffic. I'm thinking about an LS swap!
@@joshuasingh3182 LS swaps are pretty cool. There are some videos of that on youtube. I have been considering a 350 swap on mine. People also do olds 307 swap pretty easily.
I found a cherry '87 DeVille with a 4100 in it @165,xxx miles. Im sooooo curious as to wonder what was done to it to have reached those miles(rebuild, maintenance, etc). Started out asking 5500, but now its down to 3995. If ut creeps down to about the 3500 mark, i just may get it at least for the body/interior. I can always replace the motor, right?
Wow, what an Amazing piece of Junk! Loved how your dad broke into the conversation sarcastically about these, pretty Cool that he was able to experience this first hand, not to mention turning Hulk Hogan from getting one! Then aluminum-iron-aluminum with exaggerated valve covers; I don't know anything about this engine, but I guess I can say that the only good thing that a person can get from it is a laugh, hahaha! Thanks Bro! Oh and for the other comment too.. Wow! 10,000; he got a good deal!
yeah hes changed closer to 30 of them not including cam replacements on their own. ehh he did alright, the truck has some rough spots and need some suspension work but its not terrible.
@@UsefulEntertainment Wow, i know he must of got tired of looking at them coming back. Amazing that the engines already had customers names on them! Yeah, that isn't bad at all for the truck! Just saw the post as well, which junkyard is that?
@@DaisysmellowyellowPlymouth hey man. Its a yard about an hr from my house but I cant give away the name because of a video thats coming out in a few days and i dont want anyone to figure out the location reading through the comments
@@UsefulEntertainment Even if they used a cast iron block with aluminum heads and intake. Those liners were a joke. As weak as that engine was they could have cut a lot of cast iron away from the block if they did it in iron.
got me an 83 eldorado, swore i wouldnt swap it bc ive already spent sm time working on the ht but godaym im gettin tired of it breaking all the time🤦♀️ might have to swap in a 305 ..
I have an 83 Eldorado FWD that has the 4.1 The oil mixed with the coolant & motor locked up on me. I would like to replace the motor but need advise on a different motor to swap out with. Can you help me out with suggestions please & thanks!
hey man I dont want to point you in the wrong direction so im not going to say for sure this is the way to go but I think it is, Id try to slide an oldsmobile v8 in there due to the fact that the other FWD E bodies (riviera and toronado) came with olds 307s and use the same transmission. the thing about olds engines is they are almost all identical in external size and all the parts are universal too. id look for a good olds 350 and swap it in place of that 4100
Owned a 1983 Fleetwood Brougham D'Elegance Coupe in 1985?? w/the Hook & Tow 4100. That motor would break down or have some kind of problem once a week. Cadillac lost a lot of loyal customers between 1982-1988. Especially between 82-85. Hook & Tow 4100.
he worked on them too, he actually said their not too bad, he said if you unplug the solenoids on top of the valve covers, the engine just runs like a normal engine.
My question is this: weren't head bolts always breaking inside the block from being exposed to the elements and what not? Im sure THE SNOW ALONE was doing a number on them!
I need help, I just bought an 84 Biarritz convertible with 80000. The coolant is not mixing with the oil at all. My mechanic and dad told me not to use the sealant pellets. Should I? However, after driving for like 30-40 miles it will backfire and stall out. If I let it sit for ten minutes, it’s fine for a while. Any ideas?????
@@hoodrixhchris8170 their ok transmissions as long as its not the metric version, you can find out if by looking at the trans pan, it it has metric stamped into it, toss it for a later version.
@@philippeemami7594 no problem, yes it would fit right in, thats actually an olds 307 (5.0) all olds v8s are identical in external dimensions. Those 307s came in cars from 1981-90 so they are out there, just know they are pretty slow but then again they make way more power than the 4100.
I had an 82 Eldorado with the 4100 in it. I drove it over 400K miles! At apprx.200K one head gasket leaked coolant to the outside. I cleaned off the head and block where it leaked, and then I pounded in some JBWeld. The fix was still working when I traded the car in over 200K miles later. I got rid of the car because the timing chain was loosening and it had a lot of rust. If you took care of the HT4100 and didn't drive it like a teenager, they were great. I sometimes wish i'd fixt it and kept it. It was the best car I ever had. Now I drive a seville N* It's holding up at 225K but leaks like a sieve.
I had an ‘85 triple colonial yellow fwd drove it from northeast Ohio to Orlando Florida back in 2006 had 72k miles on it the only problems along the way were tbi injectors had to be cleaned causing a miss fire. Got them cleaned in Atlanta and finished the trip no problem. I think by ‘85 ‘86 the problems were ironed out but caddy lost customer trust by then. Those engines weren’t designed to go into the rwd cars. They were way too heavy and over worked the hell outta them. They were much better in the smaller fwd caddy’s by ‘85.
1980-1985 Coupe Devilles and Eldorados were really good looking cars IMO. Too bad they had worthless motors. If I had money to burn I would buy one from this era and do an engine swap
Had an 85 cadillac biarritz with the 4100 and there really isn't anything wrong with them other than the low power output but where else are you going have an 8 cylinder engine and close to 30 mpg with something that was made almost 40 years ago?
@@UsefulEntertainment yeah I heard the computer wasn’t advance enough to process the commands that well. Makes me wonder if GM ever tested anything before putting it on the market during those years.
ehh the 864 engine its self was fine, the solenoids that deactivated the cylinders were junk, dad said usually the cars would come in for their first service with complaints of them running weird, the techs would just unplug the solenoids and it would run like a normal car
I don't know why people keep saying that. It was just a 368. Just bypass the system and run it in V8 mode all the time. There you have it. The 368 was pretty reliable. I believe the exhaust manifolds would crack, but that's not a big deal.
@@UsefulEntertainment lol did your dad ever have the pleasure of working on that national treasure by ford or did he work on mostly gm engines during his career?
I remember Oldsmobile made 260 c.u motor in 77' very reliable. I commend Cadillac for the cylinder deactivatation techology state of the art for the time. I guess the engine block and heads design was a failure. I think if they used the 260 motor design , it probably would be a winner?
The problem with the V4-6-8 at the time was that the analog computer technology (processing speed) wasn't up to the task of modulating the displacement well enough to transition between the modes. There were drivability or performance issues like shuddering and surges between the modes during cylinder activation/deactivation. Technology of the time didn't support the practical application of the concept. Years later in the early 2000's MDS was becoming mainstream like the 5.7 Hemi.
I thought of something else funny. The Cimarron! :) Watch this video and pretend she is trying to start an old crappy, rusty Cimarron. ua-cam.com/video/CH_Js_5SpB8/v-deo.html
@@rapturedreamvision7205 hahaha what show is that from. Lol man i look at the Cimarron like an escalade, rebaged Tahoe, rebaged cavalier, whats the difference. People just weren't ready to be tricked yet.
I'm pretty sure it was from MadTV. You can see the whole video by searching Simmer Down Now. It is a hilarious skit. I think they did at least two versions and maybe three. You should check them out for a good laugh.
same high technology architecture. but the block was strengthened in 87 and used for the 4.5 and 4.9. same engine line sure. but they changes some major things to improve it.
@@TheSamplebridge I had 4.9 & 4.5 & 4.1 they all was the same even the hp wasn't much difference cadillac want you to think they upgraded something but really did nothing just like the north star nothing 🤣🤣🤣🤣🤣🤣🤣
You can believe what you want to believe but you couldn't be more wrong. Those motors were one of the worst motors to ever come from general motors. Where that block is cracked, there are no water jackets so it wouldnt matter if it was ran without coolant. Almost all of the 4100 cars that you see rolling around currently have dealer replacement warranty motors in them. Ask any mechanic that worked on them, read any of the other comments on this video from people that have owned them. In fact, theres a detailed video here on UA-cam of just how bad these motors were that somebody just posted 10 days ago. I suggest you search Cadillac 4100 and watch his video.
Almost as bad the GM diesels in the 80s. The 4,6,8 was garbage too. My friend's parents had an 81 De ville and it broke down within the first week. It had to be towed.
We had a random kid come in with one last summer, just got it from an old guy... over heating, coolant problems... sorry we can't help you, you will have to find someone to rebuild it for you and that's not us! Lol
lol, its easier to just drop an Olds motor in its place and call it a day but the cars them selves are too ugly and undesirable to waste the time and money in my opinion
@@UsefulEntertainment I would hardly call any of the 1980 -1990 Cadillac models ugly or undesirable at least if the 4100 is taken out of the equation. The 79-85 Eldorado was a beautiful car as was the full size Deville/Fleetwood. The 80-85 Seville was a bit more controversial but they were quite distintive.
Absolutely terrible motors, I got extremely lucky on my 88 Deville, it was the first year of the 4.5 which was very reliable. Then Cadillac made the 4.9 which was also good, but then they made the northstar and screwed it all up again.
I have an 85 Fleetwood limousine that has over 91000 miles on it. The Only problem i have is emmisson problems map sensor is always fucked up. It either runs Lean or rich .Nothing to do with the downfall of this engine.
@@insooleedat1asiandude I got a new map.sesor .didn't help found a mechanic that told me the main computer needed replacing. Got 2 different ones didn't work so he put the old one back in and tighend every thing down no problem so far.but I would try a new sensor first not that expensive. Good luck to you..
I sold more HT4100 cars than I can count. They were quiet when cold and the minute they warmed up they got noisy. I knew a salesman that used to hide in the back when his customers came back into the dealership. The motors would knock after 500 miles. I loved those cars because it made the "Cadillac" cheaper than the olds and buicks at the auction and I used to snap them up cheap and sell em to the natives in Flushing....ah you brought back good and bad memories from the good old days lol. That motor was a little better than the 4 6 8 motor from I think '81 wow...
Ok now thats a funny story, im gomna have to tell my dad that. Choice words clientele btw haha. Whats good with you guys.
You gotta find one now and let stuntman give it hell!
The V8-6-4 was a better motor than the dreaded HT4100. Only thing you have to do with the V8-6-4 is disconnect the cylinder deactivation system.
@@atx-cvpi_99 I agree. The 4-6-8 was the last REAL Cadillac engine, the 368. It wasn't a powerhouse but at least durable. Like many have said, just deactivate the cylinder drop out. I think there was a way through the climate control panel or the mileage readout to go into the program mode. You could do it from inside the car.
What? The V8-6-4 is way better than that pile of junk 😂 just remove that terrible technology and that thing is solid as hell as just a V8
Your Dad absolutely made this video, I loved hearing his nightmare inducing stories of that crap ass engine
Should bring him on for story time more often.
@@UsefulEntertainment Agreed
Crazy how infamous these engines are, My 1984 Cadillac Seville still has the original 4.1 in it from the factory and just keeps going and going for miles. I must be lucky as hell.
Lol yea, id say its one of the lucky ones. It made it this far, maybe itl just stay together.
@@UsefulEntertainment So far it shows no signs of stopping anytime soon, put 142k miles on it and keep hustling. Been a good reliable daily driver believe it or not.
@@arcane4848 glad to hear. I got a guy where i work that dailys an 85 Eldorado with the original motor, seems to be doing alright so far.
Nothing wrong with these engines
Just like the 350 diesels. There are some that keep going. I've heard that a good warm up before getting on it was key.
I worked on these engines back in the 80s and the anti freeze would actually seep through the porous aluminum block. You would satisfy this repair campaign by dropping a leak stopper pellet into the radiator. Never bought a GM after seeing this and other nightmares.
funny, my dad said the same thing once about the seepage and the pellets
That can clog the heater core, can't it?
@@DUCKSAREEVILLLLLLLL G.M. wouldn't ever admit that and the customer never knew about the pellets. G.M. only cared about getting the vehicles through the warranty period, scumbags. I'd never buy a G.M. vehicle.
@@gregoryl8374 All corporations are like that. Far more Huyandais and Kias are catching on fire than GM Fieros ever did. All the old, classic Grumman USPS vehicles you see on the road have GM Iron Duke engines in them, despite the trucks being out of production since 1994. They're dogs, but reliable.
North Star engines do that also
My dad's Eldorado never gave him any trouble. Maybe it was lighter than the Seville and was easier on the engine. Mostly freeway miles too. I still have it but it's been sitting for....oof, 30 years. Ha, I should make my first video and try to get it started.
Me to I got a 1985 Cadillac Eldorado. Runs perfect not even a check engine light. 130,000 miles
An ex-coworker of mine purchased a brand new 84 Eldorado in 84. This car had the 4.1 v8 engine. He and his wife were driving to Las Vegas from Los Angeles when the car was three months old. He told me he was driving along @ 70 mph approaching Zyzzx road. He said all of a sudden there was a horrible noise and the engine stopped. What happened was the crank shaft broke in two different places. He did not keep the caddy to much longer after that. The best engine for the Eldorado was the Oldsmobile 350 V8 which was installed in the 1979 Eldorado. Cadillac used that engine in just the 79' model year. They fuel injected that engine with the throttle body injection system. But it had a measly 170 hp. Cadillac really screwed up and ruined a great car with that 4.1 V8.
It means a lot hearing from your pop and what he knows... Good vid
I agree, he's been there / done that. I'm glad I could give him a moment to get his word out because it seems these demon engines flew under the trash radar for a long time.
I knew the 4-6-8 were trash, but did not know the 4100 was such junk..... I love how your Pa threw in there "it's just two Vega engines slapped together"... Since I know the Vega had the same basic Aluminum/cast iron mix blunder... And I didnt know the "Norstar" was junk to... Loved the Cadi's from the 80's, but would be best to throw a reliable 350 in one.... @@UsefulEntertainment
@@andrewandres148 he said the 8 6 4 motors ran fine, you just had to unplug the solenoids above each cylinder so it would run on all 8 all the time.
Yup, v8 Vega motor lol.
A lot of cars got engine swaps back in the 80s to my understanding.
Chevy motors, Pontiac, olds, you name it, people would jam them under the hoods of Cadillacs.
Ford FE engines used valve covers which covered the heads and intake too... at least they were good engines
I didnt know that, cool man.
First time watching your videos but i could binge- hear your dad's stories. Wish he had a mike when you made this video.
Lol ill have to do story time videos with him. Its cold out and there's not much to do anyway.
I had the HT 4100 in a 1983 Coupe DeVille. The car was great overall, but the engine was not designed to be in a large rear-wheel drive car like that as it was pretty slow. I fortunately never did have problems with the engine as it was rebuilt before I bought it by someone who must have known what they were doing. I got it to 160k miles before the frame started to rust out on me.
Dude I love this video your dad was like a legend at the Cadillac dealer ship huh?
Against his will lol
Yup, everything he said. It was mostly the combination of dissimilar material and the expansion rates that eventually caused seal leaks. I had an absolutely gorgeous 1984 Eldorado Biarritz in black with red leather interior. Bought it from a Caddy mechanic that raided his dealers parts dept and restored it using GM parts, rebuilt the engine. Engine locked up a year after I bought it. I think it was an intake leak. Oil looked like shit. I had 2 of those. The first '84 was an ETC formerly owned by the Pres of Bank of America in Houston. It had stamped steel valve covers. The second one had those aluminum valve covers. Mine had a really weird stinky exhaust when cold with a touch of smoke.
After I got rid of it, about 12 years later way east of Cleveland I found some guy selling a super nice '84 or '85 Eldo balck with black interior. Aluminum wheels. maybe 54-56k orig miles. Absolutely beautiful car. Reminded me of my old one but not a Biarritz. He bought it off some elderly neighbors that split time between there and Florida. While I was checking it out I smelled that same stinky oily exhaust, and said "Nah, sorry, it's a beuatiful car but I'd have to have rocks in my head to buy another one of these." That one had the digital dash too.
One other thing about those cars was they had to make a special version of that transmission with an extra low first gear the engine was so under powered. That would have been a hell of a car with a 368 or Olds 350. The best engine they ever had in those was the early Seville with the fuel injected Olds 350. Back then the Seville was the most expensive Cad even over the Fleetwood. I'd probably take a 350 diesel over the HT4100. I had 3 of those diesels and got all of them running pretty good.
My dad had an 87 coupe de ville with this engine and we drove it from Los Angeles to Queens NYC back in 2003. The car was misfiring from the start and would struggle going up the Colorado mountains. It also almost left us stranded in the middle of nowhere on route 66.
Hehehe, lesson learned 🤣🤣🤣
Your Dad was Classic Describing What Happened With These Engines .
We used to call these at the Amoco station I worked at in the mid 1990's the Hook & Tow 4100
I have an 85 seville with a trashed out 4100. I’m looking to swap it out with something more reliable, not too worried about making a bunch of power tho. What would yall recommend? I had an old timer tell be the easiest thing to do would be a 307 from a 1979-1984 toronado, el dorado or riviera. Can’t really find much info but what I have found “seems to” confirm this. Anyway, what do y’all think?
What yall think of the north star engine head bolts 🔩 working loose and blowing headgaskets talk about that
What happened with the earlier Cadillac 4.1 V8s? Lack of heat treatment or improper heat treatment on some components? That really makes the 4.3 V6s look like an upgrade!
(a.k.a. "4300" and "262 CI") (The V6 that the Chevy Astro/GMC Safari regularly had)
I have an 84 Sedan Deville RWD, it runs but fuel pump is bad. Will be quite the adventure to see how long it lasts
cool info never knew about the 4100
all good, a lot of people dont.
4100 engines are great I had many of them never had a problem
You dads story makes the 3.6 high feature look a saint.
Oof timing chain disaster high feature 3.6 lol, my ex had one in her 5th gen Camaro.
@@UsefulEntertainment The best engine GM ever made was Ward's 10 Best engines from 1997-2008 Buick 3800 3.8L V-6
@@chrislemaster2695 the 3800 series 2 motors had their problems too. An ok motor at best.
had an '83 Deville in '93 with this motor. What a nightmare!
He is somewhat right but somewhat being excessive. I have a 1985 Cadillac Eldorado and it has this engine. It is running perfect and strong at 130,000 not even a check engine light.
Did your dad leave the Cadillac dealership before they came up with a fix for the leaking intake gaskets? My parents had an 85 Eldo and it had the 4100 in it. My neighbor was a Cadillac engine mechanic at a Caddy dealership back in the day when these were new cars. He asked me if it had the cam replaced yet and I asked him why they would. He told me about the problems that were associated with the 4100 and said that there was a fix. It was to use special belleville washers on the intake bolts to allow for a bit of movement between the head and intake manifold when it heated up and cooled down. He ended up doing the repairs on it including the cam and lifters that were already starting to show wear and it ran fine for many years after that.
Cool man, Im not sure when he left the dealer but ill have to ask him.
I got very lucky with my 84 Fleetwood.. The HT4100 out lasted 3 transmissions. Had right at 300,000 miles on it when the last transmission went out and I didn't repair it. But the engine ran fine. Maybe it got a new engine very early on. But no complaints from me on it.
I was shocked they used that engine in the Fleetwood. They usually used a more 'traditional' V8 in the Fleetwood like the Cad 368 or 429 or even other divisions engines. The last ones used the 307 or Chev engines.
lol I was thinking of selling my Lincoln to get an 83 Cadillac, but your dad was saying Hulk Hogan did the opposite 😂 might have to stick with the Lincoln unless I want to stick an LS in the caddy
Greetings from Germany! I got a 1984 DeVille with that engine and i love it! Its garbage i already put like 10k into the engine but whatever 😂 Its a nice car and i will always fix it. Mine got 100k miles on it
Haha, greetings man. I'm glad you enjoy it, don't know if I'd run it on the Autobahn but probably rides nice around town 👍
I have troble getting on the Autobahn because it soooo slow. Transmission wants to downshift all the time 😂 Even in town you have trouble getting along. Its impossible to pass someone
I’m saying this just to see what you will say, I own a 1991 Chrysler New Yorker Fifth Avenue mark cross edition as a daily driver. I genuinely have had decent reliability with it too
Great story. Thanks.
Glad you enjoyed it
HT = High Technology, my 91 coupe DeVille has the direct descendant of this engine the 4.9, bulletproof,
EWWW I had to look up what a 91 looks like, Its like a K car Newyorker but by Cadillac haha... No offence but we gotta get you another set of wheels. on another note, i have heard slightly better things about the 4.9
Port fuel injection, 200 hp and a whole lot bigger than a k car. Price was right...51k original
I had all those motors. The 368 in an 81 Eldo that was converted. I really liked that car. The biggest issue that I had was the 3 speed auto. The car needed an overdrive. The gas mileage was terrible. 9 in the city 14 highway. the 83 Coupe DeVille with the 4100 lasted 10 years and 123,000 miles before a failed MAT sensor and a spun bearing did it in. I hit 17/25 mpg. My 90' Coupe was my favorite. It had the 200 HP 4.5. It was ridiculous off the line. It was faster off the line than my 88 Corvette. The gas mileage wasn't as good as the 83.
Worked at a Pontiac Cadillac dealership during these "horror years". Swear to God, the owner rented an off site shop, put two heavy line techs in it, paid them a premium on flat rate, hired a retired gentleman part time to run parts, etc. why, because the main shop was literally filled with Cadillacs with the hoods on the roof and empty engine compartments and did not want customers seeing this!!! Of course, salesmen kept selling them. Ahh, memories.😊
What did Cadillac replace the 4100 with? Could you easily replace it with a small block Olds 350/403?
yes it would go right in its place, wether its a b body rwd or an e body fwd, the buicks and olds versions used olds 307s or buick 3.8s, it all swaps around
Makes you wonder how many resources total were wasted in order to rush and save the resources used in 1 or 2 mpg. Far more than was saved, just like with the crap they do now start/stop and cylinder deactivation. Nobody is allowed to figure in that it takes the equivalent of losing 15 mpg to gain 10. Including all the extra parts, research, increased maintenance and shorter engine life. Creating all the replacement parts and shipping them as well which in the case of the 4100 entire engines is absolutely massive.
Never bought another Caddy again after selling my 83 Fleetwood in the mid 80's. Only bought Lincolns and never looked back. Too painful.
I worked on tons of those turds back in the 80's and early 90's. They were total crap. I don't think any of them lasted more than 2 or 3 years. They ate head gaskets like a fat guy at a Chinese buffet. I don't care how many fanbois want to make apologies for the 4100, they are not even worth using as a urinal.
HT= hook& tow
I wonder how many owners demanded anything other than a 4100 as a replacement engine; I'm sure the V6, or a 305, or even a 454 would have cost less to make than one of these. It would be interesting to see what Caddy did to make the later 4100s, as well as the 4.5 and 4.9 more solid.
If it were that easy I would have dropped in almost ANYTHING to replace that engine. You'd have to change the trans and a lot of other stuff. Exhaust, cooling, mounts, AC bracketing. If you were really into the car it could be done. A lot of work.
9 some of the cars had beautiful bodies, we had a El Dorado barits on a maple fireworks white top white leather red carpet bows dual power seat recliners true spoke wheels it had every option what was the fix pull the ht4100 out, what do you put back in? Did anybody come up with a solution?
the dealers had to replace the cam while the motor was in the car if it was just the cam that went bad but the other times they just replaced the engines.
I have one that has 170,000 miles on it in a 83 coupe de ville that was my grandfather's. I guess he got one of the few good ones. Even so, you have to pray that it gets up to hiway speed before trying to merge into traffic. I'm thinking about an LS swap!
cool man, an ls swap in a fwd caddy would be interesting to say the least
@@UsefulEntertainment It's Rear wheel drive.
@@lloydc6285 oh i was thinking Seville or Eldorado. Oops
If u had to do a swap what could you put in
@@joshuasingh3182 LS swaps are pretty cool. There are some videos of that on youtube. I have been considering a 350 swap on mine. People also do olds 307 swap pretty easily.
I found a cherry '87 DeVille with a 4100 in it @165,xxx miles. Im sooooo curious as to wonder what was done to it to have reached those miles(rebuild, maintenance, etc). Started out asking 5500, but now its down to 3995. If ut creeps down to about the 3500 mark, i just may get it at least for the body/interior. I can always replace the motor, right?
Guaranteed it's on a second motor 😜😜😜
@@UsefulEntertainment yeah, I wouldn't doubt it 🙄😆
Wow, what an Amazing piece of Junk! Loved how your dad broke into the conversation sarcastically about these, pretty Cool that he was able to experience this first hand, not to mention turning Hulk Hogan from getting one! Then aluminum-iron-aluminum with exaggerated valve covers; I don't know anything about this engine, but I guess I can say that the only good thing that a person can get from it is a laugh, hahaha! Thanks Bro! Oh and for the other comment too.. Wow! 10,000; he got a good deal!
yeah hes changed closer to 30 of them not including cam replacements on their own. ehh he did alright, the truck has some rough spots and need some suspension work but its not terrible.
@@UsefulEntertainment Wow, i know he must of got tired of looking at them coming back. Amazing that the engines already had customers names on them! Yeah, that isn't bad at all for the truck! Just saw the post as well, which junkyard is that?
@@DaisysmellowyellowPlymouth hey man. Its a yard about an hr from my house but I cant give away the name because of a video thats coming out in a few days and i dont want anyone to figure out the location reading through the comments
GM had it but lost it all with these monsters which seemed to come one after the other.
they're never going to recover, should've just let them go out of business back in 09.
So many designs for a pushrod engine. 3.8s are mostly plastic lol but they are good engines.
two sunglasses bossmode
Your pa! Vietnam Charlie flashback! 😂 but you summed up well...the Northstar made us all forget just how terrible the 4100 was!
🤣🤣🤣
i have 85
seems to be ok still cranks just
when car is hot its hard to start
Valve cover seating on intake and head like the Ford FE generation.
the cast heads were used to keep the block from twitching
In that case, you would think they would use an iron intake to hold it all together but they didn't. It was just another public experiment.
@@UsefulEntertainment Even if they used a cast iron block with aluminum heads and intake. Those liners were a joke. As weak as that engine was they could have cut a lot of cast iron away from the block if they did it in iron.
got me an 83 eldorado, swore i wouldnt swap it bc ive already spent sm time working on the ht but godaym im gettin tired of it breaking all the time🤦♀️ might have to swap in a 305 ..
Olds 307 is a much easier swap and they are everywhere.
Would an 307 from a oldsmobile cutlass fit?
For what was supposed to be the "prestigious" division of GM, they apparently cut a lot of corners designing Caddies in the 1980's...
Bro, the year they peaked out in was 59, every year since has gone down hill.
I have an 83 Eldorado FWD that has the 4.1 The oil mixed with the coolant & motor locked up on me. I would like to replace the motor but need advise on a different motor to swap out with. Can you help me out with suggestions please & thanks!
hey man I dont want to point you in the wrong direction so im not going to say for sure this is the way to go but I think it is, Id try to slide an oldsmobile v8 in there due to the fact that the other FWD E bodies (riviera and toronado) came with olds 307s and use the same transmission. the thing about olds engines is they are almost all identical in external size and all the parts are universal too. id look for a good olds 350 and swap it in place of that 4100
Oldsmobile 307
@@UsefulEntertainment I was thinking the same thing I just needed some reassurance. Lol! TYVM
@@bobbyheffley4955 Thank You!
Owned a 1983 Fleetwood Brougham D'Elegance Coupe in 1985?? w/the Hook & Tow 4100. That motor would break down or have some kind of problem once a week. Cadillac lost a lot of loyal customers between 1982-1988. Especially between 82-85. Hook & Tow 4100.
I have an 86 Deville with 179k still running GM messed up the execution of this engine I got lucky, my father in law bought new
Would love to here what your dad would have to say about the v8-6-4.
he worked on them too, he actually said their not too bad, he said if you unplug the solenoids on top of the valve covers, the engine just runs like a normal engine.
My question is this: weren't head bolts always breaking inside the block from being exposed to the elements and what not? Im sure THE SNOW ALONE was doing a number on them!
That much I'm not sure of but I could see it happening
What about the 4.1 v6 that were in caddies?
ive heard ok things about the v6s
You could make that bus into a party bus.
hah its FILLED with transmissions
I have nightmares of my older brother’s 85 eldorado
Glad I saw this video, was looking at a nice 83 Sedan DeVille with HT4100 engine. No thanks.
Im changing the world LOL
Those engines are great
I need help, I just bought an 84 Biarritz convertible with 80000. The coolant is not mixing with the oil at all. My mechanic and dad told me not to use the sealant pellets. Should I?
However, after driving for like 30-40 miles it will backfire and stall out. If I let it sit for ten minutes, it’s fine for a while. Any ideas?????
Also, I don’t think it is the camshaft because the engine is not knocking and it is not misfiring.
@@elijahlaplaca4903 Did you ever figure this problem out?
When I bought my 83 caddy the motor was swapped to a 305 is that better than a 4.1 and is a 305 reliable?
Yup, 305 chevy is just the underpowered version of the 350 but they go for ever.
@@UsefulEntertainment do I need to change the 2004r is it reliable
@@hoodrixhchris8170 their ok transmissions as long as its not the metric version, you can find out if by looking at the trans pan, it it has metric stamped into it, toss it for a later version.
My damn HT4100 blew up 2weeks ago.....thinking of a swap with a 350 Chevy.
You can, even an olds 350 or 403 would work good.
@@UsefulEntertainment Thanks for your return. Do you think the 1989 V8 5.0 Cadillac put on Brougham models would make it?
@@philippeemami7594 no problem, yes it would fit right in, thats actually an olds 307 (5.0) all olds v8s are identical in external dimensions. Those 307s came in cars from 1981-90 so they are out there, just know they are pretty slow but then again they make way more power than the 4100.
Yep I remember the hook and tow 4100🤣🤣
I had an 82 Eldorado with the 4100 in it. I drove it over 400K miles! At apprx.200K one head gasket leaked coolant to the outside. I cleaned off the head and block where it leaked, and then I pounded in some JBWeld. The fix was still working when I traded the car in over 200K miles later. I got rid of the car because the timing chain was loosening and it had a lot of rust. If you took care of the HT4100 and didn't drive it like a teenager, they were great. I sometimes wish i'd fixt it and kept it. It was the best car I ever had. Now I drive a seville N* It's holding up at 225K but leaks like a sieve.
Mine must be rare because before I bought it from my mom a few months ago she had it for 15 years with no issues!
Trust me, that car probably had the motor replaced when it was new and that's why it still runs
I had an ‘85 triple colonial yellow fwd drove it from northeast Ohio to Orlando Florida back in 2006 had 72k miles on it the only problems along the way were tbi injectors had to be cleaned causing a miss fire. Got them cleaned in Atlanta and finished the trip no problem. I think by ‘85 ‘86 the problems were ironed out but caddy lost customer trust by then. Those engines weren’t designed to go into the rwd cars. They were way too heavy and over worked the hell outta them. They were much better in the smaller fwd caddy’s by ‘85.
That great GM feeling just like cramps before diarrhea the North Star wasn’t much better
1980-1985 Coupe Devilles and Eldorados were really good looking cars IMO. Too bad they had worthless motors. If I had money to burn I would buy one from this era and do an engine swap
I was expecting him to pee on it.
Had an 85 cadillac biarritz with the 4100 and there really isn't anything wrong with them other than the low power output but where else are you going have an 8 cylinder engine and close to 30 mpg with something that was made almost 40 years ago?
by 85 most of the problems where ironed out. but their reputation was destroyed
If your dad worked for Caddy at that time he sure saw a share of crap including the 350 diesel and the V8-6-4
Yeah he did, he worked on all that crap.
Said the 8-6-4 ran fine if you unplugged the solenoids.
@@UsefulEntertainment yeah I heard the computer wasn’t advance enough to process the commands that well. Makes me wonder if GM ever tested anything before putting it on the market during those years.
@@Fordguy02 lol, same thing with the Chrysler Lean burn.
Where is earl Guyton talking about how a 4.1 is a big engine and they make lots of power
Right, fkn idiot that guy is.
Yeah. And the 8,6,4 motor before that one was no better!
ehh the 864 engine its self was fine, the solenoids that deactivated the cylinders were junk, dad said usually the cars would come in for their first service with complaints of them running weird, the techs would just unplug the solenoids and it would run like a normal car
I don't know why people keep saying that. It was just a 368. Just bypass the system and run it in V8 mode all the time. There you have it. The 368 was pretty reliable. I believe the exhaust manifolds would crack, but that's not a big deal.
Will a 350 fit in its place?
Yep, an Oldsmobile 350 would fit the easiest
It shouldve just been all alunimum instead cast iron terrible idea of a notor
Wonder how long hulk hogan stayed with ford considering two decades later the 3v modular came out 😂😂😂
LOL
@@UsefulEntertainment lol did your dad ever have the pleasure of working on that national treasure by ford or did he work on mostly gm engines during his career?
@@matthewheld1292 he was always at GM back then.
The engines in this video is 40 years old no telling what's wrong with these
The only reason that 4100 was crack somebody didn't put coolant in it
What about the 4.5 on the 1988
ive heard good things about them, guess they finally got it right
4100 is the same engine
@@UsefulEntertainment 4100 is the same engine
Knock - knock.... Who's there ? HT - 4100.
lol yep
I remember Oldsmobile made 260 c.u motor in 77' very reliable. I commend Cadillac for the cylinder deactivatation techology state of the art for the time. I guess the engine block and heads design was a failure. I think if they used the 260 motor design , it probably would be a winner?
I hear ya, id pick the olds 307 over the 260 tho
The problem with the V4-6-8 at the time was that the analog computer technology (processing speed) wasn't up to the task of modulating the displacement well enough to transition between the modes. There were drivability or performance issues like shuddering and surges between the modes during cylinder activation/deactivation. Technology of the time didn't support the practical application of the concept. Years later in the early 2000's MDS was becoming mainstream like the 5.7 Hemi.
They for the most part didn't last long enough to waste a cam.
I remember that piece of junk motor, greatfully from a second hand bird's eye view. Wisely informed against anything bearing it's tag.
Aluminum block and cast iron heads. I guess they didn't learn anything from this winning formula on the Vega.
nope, its like dad said, 2 glorified Vega motors glued together lol
It's like you get twice the Vega for twice the money. :)
I thought of something else funny. The Cimarron! :) Watch this video and pretend she is trying to start an old crappy, rusty Cimarron. ua-cam.com/video/CH_Js_5SpB8/v-deo.html
@@rapturedreamvision7205 hahaha what show is that from. Lol man i look at the Cimarron like an escalade, rebaged Tahoe, rebaged cavalier, whats the difference. People just weren't ready to be tricked yet.
I'm pretty sure it was from MadTV. You can see the whole video by searching Simmer Down Now. It is a hilarious skit. I think they did at least two versions and maybe three. You should check them out for a good laugh.
Farmer dan looking for parts for his john deer.
you talkin bout zak???
@@UsefulEntertainment yea
@@TheSamplebridge HAH
Top engine clean campaign .5 hr Billowing smoke.
old school sea foam i guess
These were great engines, just too small for the cars they were installed in.
I had a 82 seville that went through 2 motors, the engines were junk
Im guessing your father must of worked at Silver Star in T.O?
Nope, just a few dealers in CT NY area.
i mean i like those valve covers. that was alright lol
haha their designed to make it look impressive to the old fart thats about to whip out his check book.
@@UsefulEntertainment would be nice if more where designed that way honestly i always liked the big finned covers
@@EfurdGarage agreed
Hold up the 4100 engine and 4.5 and 4.9 is the same engine they was pretty good the north star was famous for blowing head gaskets
They are not the same engines
@@AntoineMiller they are
same high technology architecture. but the block was strengthened in 87 and used for the 4.5 and 4.9. same engine line sure. but they changes some major things to improve it.
@@TheSamplebridge I had 4.9 & 4.5 & 4.1 they all was the same even the hp wasn't much difference cadillac want you to think they upgraded something but really did nothing just like the north star nothing 🤣🤣🤣🤣🤣🤣🤣
I seen these 4100 engines get 300,000 miles still going strong
Hold up 4100 engines are great 4.5 V8 4.9 are the same engines
You can believe what you want to believe but you couldn't be more wrong. Those motors were one of the worst motors to ever come from general motors. Where that block is cracked, there are no water jackets so it wouldnt matter if it was ran without coolant. Almost all of the 4100 cars that you see rolling around currently have dealer replacement warranty motors in them. Ask any mechanic that worked on them, read any of the other comments on this video from people that have owned them. In fact, theres a detailed video here on UA-cam of just how bad these motors were that somebody just posted 10 days ago. I suggest you search Cadillac 4100 and watch his video.
@@UsefulEntertainment not true no worst then the north star head bolts working slack and blowing headgaskets what you say bout them 🙄
Cadillac would have been better off using an old Buick aluminum 215
Yes. Rover had ironed out all the teething problems that plagued the early versions of that engine. They kept building it into the early 2000s.
The Buick 3.8L 3800 Series of engines would outlast the cars
Almost as bad the GM diesels in the 80s. The 4,6,8 was garbage too. My friend's parents had an 81 De ville and it broke down within the first week. It had to be towed.
The V8-6-4 was actually a good engine when the cylinder deactivation was disconnected.
@@atx-cvpi_99 4100 is a great engine to
We had a random kid come in with one last summer, just got it from an old guy... over heating, coolant problems... sorry we can't help you, you will have to find someone to rebuild it for you and that's not us! Lol
lol, its easier to just drop an Olds motor in its place and call it a day but the cars them selves are too ugly and undesirable to waste the time and money in my opinion
@@UsefulEntertainment I would hardly call any of the 1980 -1990 Cadillac models ugly or undesirable at least if the 4100 is taken out of the equation. The 79-85 Eldorado was a beautiful car as was the full size Deville/Fleetwood. The 80-85 Seville was a bit more controversial but they were quite distintive.
@@ponchoman49 i will agree the Eldorado isnt that bad looking of a car but i think the Riviera is better looking, especially the 84s and 85s.
Absolutely terrible motors, I got extremely lucky on my 88 Deville, it was the first year of the 4.5 which was very reliable. Then Cadillac made the 4.9 which was also good, but then they made the northstar and screwed it all up again.
seems like they were in a endless cycle of doom since the 70s. now they only make sports cars.
Yeah man that 4.9 was a great motor the 4.5 was a crap shoot but the 4100 you could hear it before you saw it lol
I have an 85 Fleetwood limousine that has over 91000 miles on it. The Only problem i have is emmisson problems map sensor is always fucked up. It either runs Lean or rich .Nothing to do with the downfall of this engine.
lucky hah
Ive been dealing with this recently, anything you do to help it out ?
@@insooleedat1asiandude I got a new map.sesor .didn't help found a mechanic that told me the main computer needed replacing. Got 2 different ones didn't work so he put the old one back in and tighend every thing down no problem so far.but I would try a new sensor first not that expensive. Good luck to you..
Check the injector O-rings. They shrink from exposure to gasoline and cause them to dribble and run rich. Then if they seal back up they run lean.
Those are JUNK engines! I replaced mine with an olds 455
Probably the only wise decision you can make with these really.
Or a SBC 350. A lot of the Sevilles had a Oldsmobile 307 or Chevrolet 305 swap because they were fuel efficient like the HT-4100 was.