The Cat 7.1 Diesel Engine. Know Your Engine. Facts, Review and Whether it is Good or Bad.
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- Опубліковано 2 лип 2022
- In this video we are discussing the Cat 7.1 Diesel engine.
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Isn't there a mechanical fuel type c7.1 engine aswell?
OMG... 😂😂😂 I haven't laughed that much in a very long time! Awesome Video Josh! Keep them coming... Blaaaaahahahahaha!
Hot questions for you. I'm working on my c7.1. Need to remove the air compressor and would like to know if this is a timed compressor and do I need to do anything specific for that. The next thing is it appears that the adapter the compressor mounts to has a gear or something from the inside of it eating a hole in the adapter plate and has caused a big oil leak 🤔 not sure what or why this is happening. Any insight 🙏 👍🏻 love your videos thanks 👍🏻👍🏻
As an Cat mechanic I feel with you Josh. The english engineers doing there best.
I like how mad he gets when he is explaining the injectors trim code issue reminds me of how mad I get sometimes when I’m working 😂😂😂😂
I've never worked on these but the injector trim rant was well deserved and quite hilarious. You have my sympathy. Happy Independence Day Josh!
I’m a hobbyist and like how you explain about how you fix Caterpillar engines Josh. I’m not crazy about Torx fasteners because of having extra tools for them and not always using them.
Now I know why the Cat and Perkins websites look so similar...
10:25 Torx bits are everywhere (11:11 to 11:23 is the best part)
12:30 The oil pan spacer
14:00 The rocker arm shaft
16:14 The camshaft and lifters
17:18 Injector trim file numbers (18:31, 18:42)
I feel you on the torx fasteners. I go the same rants when I work on 80s and 90s American rigs with sae, metric, torx, and Allen head fasteners all mixed together. It's so frustrating have every wrench and socket you own out and in use for one job. Completely impossible to stay organized. Makes working on my toyotas or older American stuff such a joy when you can quickly look at a bolt and know it's a 14 mm or a 9/16.
And don't even get me started on Whitworth as I just about give up and pull out the Cresent wrench.
As a fellow Cat tech I agree with you 100% on the 7.1
As a mechanic for Boeing, I’m with you on torx! They use them on EVERYTHING and I hate them…
Customer I work at regularly has several 4.4's around 20k hours, a couple 7.1's around 12k, and a 6.6 with 27k non-rebuilt hours. That particular one is pretty impressive. Throws the low oil pressure alarm at low idle if ambient is over 90F, but still out there working.
Absolutely loved your commentary on this one your emotion was great keep it up 👍
Josh going off about the torx used on this engine is great! We need more of this anger in the content!
Soon they're gonna make an engine where all the fasteners are tamper-proof Torx Plus.
I love when you get excited
10:20 to 10:42
Masterful
Ah. I believe I had a similar rant on the torx variations myself not to long ago. Preach it man.
The cam/lifter situation is similar to the cummins isb engines. Any time you have to take the cam out in-chassis you jam wooden dowels in the top of the lifters where the pushrods sit and rubber-band them together so they don't fall. I find it funny that an actual cummins special tool is just 12 wooden sticks.
They replaced it with rubber bushings that spread with a jam nut. But hey I still use the ole wooden dowl trick. Haha
The latest 6.7L Cummins now has hydraulic lifters. So cab now has to come off for any cam removal.
@@Ratkill9000 I’ve lived long enough for a Cummins to turn into a Powerstroke. How the mighty have fallen.
@@markm0000 the 6.7 PowerStroke from what I've seen isn't that bad of an engine. But all modern diesels including Duramax have their issues
@@Ratkill9000 HUH?? Or pull the engine? My shop has done a couple hundred overhauls on DT466's and the replacements clear thru to the N9 and N10's. Haven't done any 6.7 Cummins yet. In a medium duty truck or bus what is the lifespan?
Next time tell us how you really feel about torx! I still think you might like them.
Great video, I own one of these engines, and so far so good. Fuel efficient and much quieter than the old C7’s
It would be a great video if you could talk with a engineer who was involved in the designing of the 7.1...or any other engine for that matter...to explain their side of why stuff is done.
That would also be a cool idea.
Everything about saving 5 cents here and 2 cents over there.
Second this. There'll be a lot of research involved I'm not short selling that but it would be greatly appreciated and fun to see.
Couldn't find one as they all denied all knowledge.
They would be old Perkins guys in the UK. Most likely to be found in the Peterborough cemetery...
thanks mr.josh i really enjoy your vids. you are a great man
I've been seeing a bunch of these 7.1's in the shop at my Cat dealership and was curious about them. Now I know!
I LOVE your rants!😂 love your videos as well although I have a cummins I learn a lot watching your videos. Keep it up
This is my All time favorite video from you !!
Glad you liked it.
I love the torx rant! Dang funny. I just had the rocker shaft off a 404 John Deere engine in a 4020 tractor. They have the same design. The trick is to hold your tongue in the right position while you install it 😆
1st time I heard Josh get loud. I like it.
Thanks for the video Josh! Hope you have a happy and safe 4th of July!
Yeah, as much as I like Perkins engines they had a thing about not having dowel pins on the front timing cover and case.
There is a special alignment tool for each engine which makes the process easy.
Made by employer by one for a 1004-42 I was working on quite a few years ago.
C7 Chronicles of a mad man!
That rocker assembly must be heavy as hell too. The 12.7 Detroit has 2 shafts, 3 rocker sets, and it’s a bit of a bear to get on and off, even with the useless Detroit rocker tool. Love to see ya get mad at something, most my jobs require plenty of cussing. Awesome video, Josh!
Josh, The C7.1 engine you showed on that 950M wheel loader is as you said a series turbo engine, however, is not the most sold nor commonly used on Cat machines or industrial engines, in fact all Small Wheel Loaders are equipped with the single turbo version, likewise for Industrial applications. Fuel System is provided by Denso. I’ll ask some friends about the trim files and I’ll make sure I’ll send them a link of your video rant on trim codes and fasteners, speaking of which, remember that nowadays all Cat engines smaller than C7.1 are designed and most likely built in the UK by the IPSD Medium Engine division.
Awesome ranty video man. Fittingly needed a destruction of the week. 💥BOOM 💥 BOOM💥💪👍💥
Thank you Jeri.
This was interesting to me especially. I've got a C4.4 (Perkins 4-cylinder version of the 6.6/7.1) that I'm swapping into my Land Rover. It's only got about 3k hours on it and seems to be running well, so hopefully that means I've got a lot of hours left. And also hopefully I won't have to mess with any of those maintenance items you complained about. :)
Did injectors on one of these engines in a 930M, took me about 6 times of trying to enter the injector #’s in ET to finally get it right. Also, after installing rocker shaft special spacers, temporarily insert hold down bolts to help with lining up when setting in engine.
Thanks for the video. 👍
Hope you have a great 4th of July, stay safe and healthy Sir.
Thank you and you too.
I love your passion! I’m not fond of torx either and I sometimes find tiny little torx when working on electronics. And they are always in a size I don’t have or can’t find locally so everything comes to a halt while order them. And never order just one….cause it will break! I hope you and your family have a wonderful Independence Day!
Thank you Larry, there seems to be a nearly universal hatred of them. I wish you guys a great 4th as well.
@@AdeptApe don’t know if I told you but after the great turbocharger debacle, my heui pump is being rebuilt at a place in Florida. I showed the mechanic working on my C7 your wonderful video about troubleshooting and replacing the pump. Mine was fluctuating more than several hundred psi so I suspect there was some contamination from the turbo. BTW the mechanic was incredibly impressed with your videos!
Enjoy your videos. So funny when you talk about Torx. Glad you don’t work on BMW engines because this is their favorite fastener in the universe.
Thanks for the video. Great channel.
The rocker shafts look like typical old British automotive engine design (see Mini / Morris / Austin). If the push rods are retained in the lifter perhaps you could hold them in place by using something like a bulldog clip or similar on the push rod to hold the lifters up when removing the camshaft...
Lovin it! :D
real rant nice one
tnx for the info about the trim files. last time i charges injectors and did not program the injectorfiles. because i entered the wrong code all te time. now i know why.
i did liked, subscribed and commented and i wasn't even asked for.
Do the C32 next! (marine plz) :)
I hear you Josh. I was flipping through a tool catalog and came across tamper proof triple square bits. I think steam shot out my ears. Someone decided to take my least favorite fastener and make it tamper proof! I wanted to scream.
I feel you on the trim codes Paccar MX trim codes are 30 or 32 digits
it's commonly done in data communication, to include a small block of 'check digits' along with a string of numbers to confirm that all digits in the string are correct, without simply repeating them. Look up 'parity' or 'CRC' for more info. the CAT 7.1 injector trim file number is actually a 120 bit binary number (like a GUID), printed in hex (base 16, ie hexadecimal, whose digits are all 0-9 or A-F), and the check digits are to confirm all of its digits are correct, so you don't get the entirely wrong file because you missed just one digit in your writing it down...
Huh?
Sorry to hear that CAT royally screwed this up. We feel your pain!
For a simple engine I feel like they literally went out of their way to make it difficult.
Yeah I found out the hard way about those plastic retainers…they aren’t fun. Found one loose and rattling around in the the valve cover..
Every time I see ACERT I cringe. The big block versions, once modded a bit, are real monsters. The twin turbo 15L is a bucket list engine that I wouldn't mind playing with.
Would be great if you did more Cat ET info videos. Looking to learn more about using et on my own engine as an owner Operator.
DOTW is Josh's head exploding
Yeah sucks on a c13 when the tiny thin gasket for the rear main seal housing is leaking.. gotta pull the trans, oil pan, bell housing, and rear motor mounts just to change this little paper gasket.. the bolt that hold that housing on are super small too and have a tendency of backing out. If you're(viewers) doing it id suggest brushing on some ultra black on the gasket(both sides) and blue loctite on the bolts or put ultra black on them because the bolt threads go through the housing and into the crankcase. So If you're a little overfilled oil can seep around the threads.
Cummins ISL is the same design.
First time I've ever heard of hidraulic lifters on a C7.1 . That's maybe because they don't have emissions regulations, but I've learned something new today. I've rebuild a few of these engines because they tend to broke a compression ring and fail (on new machines with a low SMU). For what I've worked with, the C6.6 and C7.1 were the same engines with some improvements I would say like the injection system, engine size, etc
Also, all the one I've worked with you need to adjust valve lash and for some reason the injectors have the trim number, but you don't have the option on the ET to change the trim calibration.
The same, I worked with a 962K that has this engine and it also broke the compession ring on cylinder 6, all that Joss says about the engine is true.
I find the torxs are so much weaker and brake very easy love the rant 👍
Everybody hating on torx....while I am in agreement with you that a regular hex head or Allen head bolt would be preferable for the areas mentioned in the video there are other areas where torx is my preferred style of fastener like in areas where you have a sensor held on by Phillips or straight head screws...these areas are where torx really shine because give them a little tap in and they won't slip and strip the head out...Allen heads work great too just gotta make sure there cleaned out because they don't have the built in natural reliefs for grease and grime to move to like the torx does
Interchangeable paint? Genius!!
Hire an octopus to help you with that rocker arm shaft. 😮
I have had mechanics tell me that the compound turbos make boost, which obviously is power. Keep the compound setup.
What’s up bro! Just poppin in to drop some likes and say hi. I was like # 395!
Is it just me or are those torx sockets just hard to find today.
♥Mechanic Engine Design Rage!!♥ Do this all the time about some of the same things, especially inverted torx, try working on a deutz engine some time, they LOVE inverted torx...🙄
Can you use dowels to hold the lifters into place and make a trough for the lifters to fall into like on and ISB? Not sure of I'm missing something?
I thought I was the only guy with this hatred of Torx in general. When they first started showing up, the idea looked okay. THEN, you give them a few years and some corrosion and no matter the tool manufacture there is going to be some problems. I'd take Allen or just 12 points over a Torx.
I love it cool
I share the same sentiments about this engine 😮💨
Ive been wantin a Perkapillar for a while. Be fun in a pickup
Engineers after watching this will implement Torx tamper proof fasteners.
18:08 That is actually hexadecimal! Id be willing to bet it actually contains some form of calibration information directly coded in regards to the injectors. Nice if it is as there's no information to convey beyond that when they are changed. Bad, however, if you have to type it in. It looks almost like they are laser engraved with it at the time they are tested at the factory in terms that a machine would understand, but we don't.
Great video, with great info, with junk engineering. Josh could you do a video that goes over who actually makes the various current production cat engines? I work for Carter Cat hauling equipment and get asked this frequently by customers. No need to get super in depth with specs.
The 7.1 and lower displacement engines are Perkins, the 9.3 and higher displacement engines are Cat.
@@electric7487 thanks man I appreciate the info
the Python of the diesel engine world
I love your channel..I am a junior mechanic in a company.. am specialist in America trucks.mack, frieghtliner, perterbilt, and so on..but there's got this Senior mechanic in mercedes trucks section who whenever they have difficulty with a particular job, he just go to his laptop and print out repair procedures and components details...do America trucks have such software?
Fastner rants are very justified, i have an australian holden commodore and ford falcon as daily drivers, but everything else (previous daily drivers and project cars etc) were all japanese, the holden has the buick 3.8 (L36) they decided to go metric, yeah great, but not the normal sizes, on a subaru/nissan/toyota you need 8-10-12-14-17-19-21, 32 and 36mm for the subaru front axles (early 80's)
On the damn buick v6 and ford you need 10, 11, 13, 14, 15, 16, 17, 18, 19, 34... Like cmon go a size up or down and make them regular sizes, who has a deep 11mm socket anyway. And then to top it off the intake manifold on the buick v6 needs a 3/8" imperial socket/spanner. (convinced they want me to get more excersize by continually walking to and from the toolbox, then going to the separate imperial tool box) and the ford uses those male torx bits at random also on the engine (lower thermostat housing is 3x 10mm and one i think 7mm torx male from memory)
Reminds me of when you're restoring an old car and some assholes stripped a bolt and drilled it out and tapped "what he had" and put a bolt in, so your waterpump is 5 10mm bolts and one 1/2" or some shit. Utterly infuriating, especially in a situation where youve gone to the wreckers/diy auto salvage place to grab something with minimal tools so you dont have to lug a big toolbox plus the part back to the counter only to find that you didnt bring a deep 11mm socket or like a random 5 or 7mm that they decided to use to hold the coils on and then a different size again to attach the wiring loom...
Once they made it out of the zone known as "higher education" and into the real world. Their brains were so distraught over the fact that there was but 2 bathrooms to choose from, and they knew not which of them was their own. The actual design of things took a backseat to their new misunderstandings of the world around them..
i just got to say josh, not to defend the injector QVA/trim/etc code that these come with but knowing the formatting they come in (its an older style thats written in hexadecimal) i know myself that it comes in groups of "16" and its kind of easy to tell once you try to jam em in the ecm and it tells you that the trim code is "invalid", ive seen these in all kind of "older" bosch desings, i mainly keep seeing these in mitsubishi's and nissan's while the newer 7 digit are mostly in the vw side of diesel.... but yeah not making the spacing obvious or a demarcation is plain and simple lack of foresight...
these engines can be oversized in the piston area do you do it or do you recommend long blocks and stay standard
Sounds like we need to get together and design some holders for 3D printing. 👍 3D printers are revolutionizing design, fixturing, anything where a smart ape says there's got to be a better way. 🥺
There is a pretty smart guy at our shop that did design some rocker shaft holders from a 3D printer that are way cheaper than the Cat ones. I would like to get into 3D printing though, seems interesting.
The cummins 8.3/9.0 isl lifters sound similar to these , makes the cam tough to remove, I found some 3/4 wood dowel ground it to a oblong shape push them in the lifter and rotate dowel about 60 degrees wedging them in the lifters and holding them up while keeping psi on two dowels at a time with a large rubber band , I wonder if that would work on this 7.01
German engineers use inverted torx everywhere. Oh as for the injector number, that's what the 2D barcode is for scanning and it kicks out the number. I have tons of European pumps that spec with the 2D barcode.
Well that QR code actually gives you a 49-digit number, with 19 digits and THEN the 30-digit trim file numbers. Not sure what those extra 19 digits mean.
What is the difference in engine block?
6.6 vs 7.1
Are their engine blocks the same or different types?
Looks like a Cummins cam setup. Do a rocker box gasket on a M11, 2 day job.
Frank Perkins was a German guy and his brother-in-law was the guy who invented the enigma machine that’s the problem
Frank Perkins was English. Born in the u k.
The company I work maudactures insdustrial equipment with the 7.1 Perkapillars. They seems fairly reliable other than constant emissions issues. Then again, they machines rarely get to 10k hours because the rest of the machine is trash.
you use grease to hold the lifters in, external torx, internal torx, paccar mx has 32 numbers,
Except the paint, stupid fasteners and insane numbers! HA Great video.
I have a c-15 accert I recently went to a big boss single turbo but it's running fine but if I'm not using cat fuel filters can it sound like it's sputtering please help
Wow this was an intense video
@josh I m in a search of an CAT 938H/K/M. H model has 6.6, and H/K 7.1 engine. Both of them Perkins. Should I get an older model like 938G/GII with 3126 engine?
Perkins probably had a warehouse full of extra torx bolts and had to get rid of them.
Isn't there a mechanical fuel version of the c7.1 engine aswell? They come in the cat excavators 320d2l
Great vid josh l feel you pain with stupid design choices on certain engines, and yes the first time l came across torx l was like what the🦆are these😭
Like I always said. If the engineers actually had to work on the things they designed it would be a lot simpler design.
Perhaps the annoying designs that make for longer repair times is purposely done to increase the labor costs???
11:30 🤣☝️ Needs more Torx bolts 🤣☝️
The injector trim codes are almost certainly not serial numbers. If you think about it, it doesn't make sense for them to be. That would mean your programming software would have to be aware of every single injector ever manufactured, and constantly updated in real-time as they're produced. Not exactly feasible.
Those injector trim codes are literally the injector calibration parameters themselves. They're stored as hexadecimal numbers laser engraved onto the injector. For example hex "00FF" is the decimal number "255". Each one of those little 4 digit blocks of hexadecimal likely encodes a specific variable about a particular injector characteristic. The 3406e likely needed fewer numbers because either the injectors were simpler with fewer variable characteristics, or were held to tighter tolerances with less variability.
Hope dis Engineer are WATCHING YOUR CHANNEL SO THEY CAN LEARN
I definitely feel your pain 🥺
Please make a video of softwares you think mechanics should have in Thier laptops..truck mechanics preferably
Hast to be easier to assemble at the factory is my guess
Little thought is given to work on these components
There thinking is.....why dose someone need to work on this engine..the design is perfect
I have c7.1 engine in 329d2l machine and the throttle is not working
Josh, you’re not going to like this, but the most likely reason for the inverted Torx fasteners is that the engineer likes them. Often, things like that are simply what the engineer likes to use. I am a retired engineer, not engines though. We get to include things in our designs that sometimes are simply what we want to use. As for some of the other idiosyncrasies, well, it’s British.
Thank you Bill, probably makes me more mad that someone would just choose them as a preference for no good reason.
Good day Mr Ape! Question- what u think bout doin a subscriber giveaway? Say grand prize could b a platinum rebuild for idk maybe a 3406e? Hmm just thinking out loud ;)
I will let you win the grand prize for the small entrance fee of $30,000
Well that seems fair! 🙄😆
Honestly I like torxs but I I don’t like when they start mixing them with regular bolts
Dont get me started on the use of Triple square with regular bolt hardware on engines...looking at you VW group!
@@Ratkill9000 oh dont forget about the 5 side bolts on Perking fuel pumps
The real question is: tell us how you REALLY feel about torx fasteners !! hahaha, ooooh.
😂👏👏👏👏
Oh I like it when he gets spicy! 😜