Chevy TrailBlazer Engine Noise and Oil Additives
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- Опубліковано 22 сер 2024
- Today we're working on trying to reduce an engine noise on this 2006 Chevy Trailblazer 4.2 Liter engine. Starting off with an oil additive that claims to reduce noise and engine wear. Tools used in this video are linked below for you to purchase and support the channel.
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I have the same “knocking” noise on my 2004 Trailblazer 4.2L. My oil pressure is great. Mechanic said it’s not a rod knock. I’ve put thousands of miles on it sounding like that. Currently at 192k and counting…
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I don't get it 🤦♂️ explain
Replace the engine! Open this engine up and show everyone what failed 👌
Those Motive X funnels will come in handy when I'm in my 70's or 80's and can't hold my hands steady anymore.
If and when you swap that engine, enjoy the work. Just as well service the 4wd disconnect and maybe new seals on the front diff while they are out with the engine.
They’re good funnels, specially when servicing vehicles with an anti-baffle built into the valve cover.
Rebuild it sounds like a rod knock , I had the same knocking noise in my Honda Civic ended up replacing the rods .
rod knock get faster as u give it gas. i think its a damper
Disconnect each coil one at a time and if it's a rod or piston noise it'll quiet down and you can identify which cylinder it is. If it's a piston skirt the noise will be worse the colder the engine usually be reduced or go away as it warms up & the skirt expands. If you increase the viscosity of the oil and it reduces the noise more than likely a rod bearing and if unaffected wrist pin knock.
I am suprised that no one knows how to check for rod knock that I learned as a kid. Slowly open the throttle, we call it rock the throttle. If its a rod it will knock as the engine accelerates. Its a sure give away. There is another way and have heard it on two different cars. Let it sit a day or two and start it, a slightly lose rod will knock till oil pressure builds up. The rock the throttle method can often detect a lose rod that other wise cannot be heard. Give a try, its free.
That sounds exactly what I would wright to the letter.
My trailblazer will do that if the oil gets low or low viscosity oil gets put in.. run some high mileage 10w-40 and some half a bottle of Lucas oil stabilizer and problem fixed
Kool... I'm doing that exact thing tomorrow.
yep I accidentally did a B12 acetone engine flush - actually CRC right into the camshaft via the PCV nipple. So I drove it to try burn off the acetone - and the engine was super loud - scary. So then I got LUCAS poured in there - and drove it - sounded better - got the oil changed then to get the acetone out. Then added MORE Lucas in. ... Sounds like it used to now. Not as scary. My silicone seals are leaking so I'm getting that silicone polymer additive that repairs the seals - Titan.
I would check torque convertor bolts back out against the engine, alone with internal engine diag. I have had torque converter bolts stay noisey, or quite under RPM raise.
This will be it..
Rod knock or wrist pin seems most likely. What's interesting is that the early Vortec I6es also had issues with the cylinder bore liners cracking; I think that issue was resolved after the first couple years ('02-03) but it points to a weakness in the bottom end of those 4.2s in general perhaps...
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YO! that is one sick funnel, love the video, and im guessing whatever you guess.
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What do you use for recording your videos?
That's a good one. It will be interesting to see what you find in the future.
intake runner? flex plate bolts loose? timing chain components? wal mart oil?
It’s a long shot..... loose torque converter to flexplate bolts? But I’d put money on the bottom end.
Yeah, that's what I was thinking. A must check.
yes its does sound like flex plate como decimos los mexicanos el volante de motor lol
Yup TC slightloose. Having bolts backed out a bit.
For the knocking, I would check each individual piston. Disconnect each piston one by one and start the car until you can rule out which piston it is. Then when you figure out which piston it is, I would first check the spark plug. Replace it even. If it continues, check the power to the spark plug. If it's not the cable and coupling, I would then check the compression and compare it to the other pistons.
Rod bearings is what I’m thinking. Drop the pan and check if they’re bad replace them. You should be able to turn the idle up a bit 😁.
How do you check a rod bearing visually or otherwise
If you watch ChrisFix, he has a trick to make oil pour smooth. If you pour it the way you did it (like most people do), it tends to splatter. If you hold it with either the front or back faced down, it pours smooth no matter what.
But! That funnel is DOPE tho! You don't have to worry about the splatter at all! Ima grab one.
That Mr.Landlord knocking for the rent!
Its a bearing because it half the noise went away when the oil pressure rose after the air left the system.
Hey brother, it’s me Joel. Just wanna wish you and your family a Merry Christmas and a Happy New Year!!! Much love to your success and pretty soon I will be needing your expertise on an engine swap on a BMW soon
will be interesting to find out what was causing the knock
I have a 4200 trailblazer 219k 05. It has some kind of impossible to pinpoint tap like knock. Mine does it with without gas idle you name it. I have good oil pressure; no codes. Oil looks good. Going to try Lucas. I have a feeling it's timing related like the cam phaser or a valve/lifter. You I could probably tell you it's an intermittent collapsing lifter or the phaser. That is a damn clean blazer fyi.
It would be nice to see a rebuild even if it’s probably not worth it. But then again I say rebuild everything 😅
My first thought was rod knock. Either way it needs to be torn down with no oil pressure.
I wonder if you can "fix" it with a set of bearings and dropping the oil pan.
Sounds like a hipop beat! I would use Lucas. Like the sweater 😂.
Drop your oil pan. I bet the pickup is restricted. You are some master mechanic.
Your low oil pressure experience says it needs an overhaul. Often worn cam bearings lower oil pressure and then rod knock follows.
Replace the motor fam if the rod failed or even the wrist pin it would have caused more damage to the cylinder valves and piston.. Thought about it. Check coolant for oil and check compression.. Could be a spun bearing your hearing causing the rod knock which would explain why it quites down when you bring up the rpm if that is the case definitely just scrap the 4.2 inline pretty good for like 200k. Another thing to check that i just ran across was the 4200 has variable valve timing and the solenoids are pron to fail it should be on the driver side front of the motor pull the connector if its dry it might be okay but if you find oil try replacing the vvt solenoid apparently that can cause engine knock as well.
Yo! What is up, welcome to another episode of “nut busting torque”
Frank Tran 😎
Why don't u check the torque converter & pulleys first
that noise sounds more like a dampener dont sound like a rod knock cuz it does not gets faster as you give it gas. some harmonic balancers have a bushing like rubber that fails. should be outer metal then rubber center then another inner metal over time the center rubber wears and it hits metal on metal and also can cause belt aligment issues
Remove spark plugs and coils put a long 1/4 extension turn engine by hand and when you see extension to start to go down push on extension to see if you can push piston down to see if you have a spun rod bearing . . . Repeat for each cyl to pin point witch cyl is the problem child !!
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had similar problem was the flex plate that had loosen bolts due to previous person put a transmission in but didn't torque the flex plate bolts to engine and they had loosen out
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I had that same noise in my Yukon and it was the rod bearings, lasted about a week then my motor blew.
14:09-14:11 You're a lucky guy Hector
Share that thing Hector
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When I Watching the video.
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A main bearing sounds similar, but there's a lot of moving parts in the 4.2 l motor and they are a bitch to take apart. You have to remove axles and 4 wheel drive actuators to get oil pan off,pack a lunch when you do this motor and a dinner,and another lunch and another dinner cause this was fun,but got a lot of quality time b.sn with the guys in the garage.my boys trailblazer that I worked on had water in motor, and had similar noise,someone switched a bolt in water pump fan and it was thumping on side of water pump,goobers need to be careful on their bolt sizes and not put too long of one .back into turning parts it almost took out plug in side of water pump and the roller rockers were a blast. I know that they always fly out on a the ford triton because the vvt clogs which the 4.2 has and has a variable cam adjuster on exhaust side.massive loads of fun there.maybe it will throw some onsite in on this motor IceQ
Rod bearing homie!!! had the same thing happen to me on a trailblazer, 109,000 miles. gear lube and trade it in!!!
I have a 2002 trailblazer laser same noise early in the morning more so than later what did you end up doing tried oil changes additives same thing I do notice that when you turn the key off it has a rumble shake when it turns offI have a 2002 trailblazer laser same noise early in the morning more so than later what did you end up doing tried oil changes additives same thing I do notice that when you turn the key off it has a rumble shake when it turns off?
Trailblazer
Hardworking Family man. Got a sub Homie
Had a 07 trailblazer all black i loved it man it was slick but the motor shut down after 8 months of payments...
Which vehicles are easy to work with and which vehicles are just a headache
2 years old but hope you got it fixed. My engine in my 2006 had a knock and vibrating a bit. I changed the oil no additives noise is gone but still has a small vibration. Torque convertor/ tranny probs have been ruled out. Even took the fan and balancer off and the vib was still there. Thinking your issue was internal as well. I am still driving mine today though!
I hope you got that truck reAl cheap. The 6 cylinder in that vehicle with 4wd is the dumbest design I've ever saw. Let's run the axle through the oil pan🤦 good videos my man.
Sounds like a bottom end issue, main bearings or conrod Bearings. Probably mains. You could strip the bottom end and hope the crank isn't scored and try to just replace the bearings. If not i'd replace the engine depending on what ever is cheaper. This is usually the result of poor maintenance if anyone is wondering, or just age. Regular oil (Synthetic) and filter changes for long engine life.
Our vote is pull the valve cover - maybe a collapsed lifter or something? But yeah, I don't think thicker oil or additive is fixing that one... nice funnel, btw
It's a DOHC i don' believe this engine uses lifters.
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I've used HyperLube with success in 88-92 GM 5.7 engines...
duralube takes about 200 miles before it will start to work, it's good stuff.
Did this get sorted??
Sounds like hydraulic timing belt tensioner to me,
We had same issue yrs ago with a Mazda mpv
Keep up the good work
It definitely sounds like a rod bearing.
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Thats a nice funnel set. Been eyeing that for a while.
Lets make that trailblazer an SS
I love that motivx funnel chingadera bro , very nice!
I have the same problem.I think rod nock also.and was thinking to replace the bearing..good luck
Rod knock for sure. Probably got bearing shavings in that pan if you pull it.
Hey Hektor what are you recording on? The quality is really good.
I’m using a Sony a5100 with a 16mm f1.8 Sigma lens, sometimes I use my iPhone. It all depends on what I have...
Knock Knock ! Who’s there ? A New Engine please! 😂 I did buy a funnel for my Avalon however 👍🙏
Pro tip: that noise happens when the big chingadera causes friction with the small chingadera...most likely low tire pressure.....youre welcome :) feliz navidad
That knock is caused by the vvt ( variable valve timing) solenoid which is right beside the power steering reservoir, engine sounds great other than that. Common issue on Trailblazer's
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I wonder if the engine is sludged up starving a rod bearing for oil. I don't miss working for general motors at all 😂
Hektor I meant remove plug wire or coil , what ever the case may be in the truck, but I think yours got coils, sorry and good luck
14:10 jaja Saludos hector and merry Christmas
Vvt selinoid
Sounds like the battery is low or maybe needs blinker fluid
Sounds like the rod knock I had in my old '79 Mustang with the 2.8 V6.
Fords are supposed to do that there junk this is a chance Chevy
This like a infomercial at 3 a.m. 😆
Just change the oil put rotella diesel oil in and run it till blows. Bearings bottom end.
Those engines call for 7 quarts of oil sometimes they take 7 3/4 . You put in 5 and a quart of duralube.
Ken Oger was thinking the same thing
Nice call!!!
That will not make it knock.
Feliz Navidad a ti y tu familia.
Sounds like piston slap or maybe a broken skirt lifters sound quieter and will usually quite down with a thicker oil or additive
What flashlight you Rockin Homie? I like the strong magnetic that it has.
larry lucas it’s the Harbor Freight Braun light 😎
Check water pump hektor sounds like pump bearing check first,good luck,
Feliz Navidad Hektor! 🎄🎄🎄
Hector my man. I just bought one of these. Exact same shit. Been a year I gotta know if you found it. Its crazy. I been working on m forty yrs. A rod don't come and go like that. A wrist pin either. I drove it home and haven't looked at it again yet. I've seen some stuff about that VSS. And a cracked flexplate will fool ur asss. I'm leaning that way. Could be dead wrong. But gut telling me its NOT a rod. I SURE as hell hope you see this and hit me back something away from that crank. Its cpl hundred videos on this and I aint seen nobody fix it yet.
What’s the proper idle rpm for this trucks 4.2
hold them bottles sideways for a smoother pour.
Yeo. What happen with the engine. Did you replace with a used motor and was our diag correct with rod noise??
Tolerances between the crank and the rod bearings are too great. I’d use 1qt Lucas and 20w50 or you could try straight 50 weight
Sounds like clutch fan #homie
Rod bearing or main bearing. Put a load on the engine and see if the noise gets louder
Ever fid out what noise was or is??
if that is a four wheel drive they are a hand full to take the engine out on the ground so there is no patching in frame even if it's two wheel drive it's still really tough to get the pan off . So once it's out I would I see a salvage yard in that trailblazers future.
Did you ever find out exactly what was going on mines doing that but how many would be our time in chain tensioner
Remove one coil or plug at time and see in which piston goes away if that an internal engine piston or something else,
Good idea
What was the outcome of the trailblazer? I have a trailblazer ext 5.3 and have had a similar noise for some time about 2 years or so and doesn't sound like that, but i think its getting worse. I think its just a lifter.
have the same noise, just redid upper end and the noise is still there, would like to know what it was
Definitely rod knock to me.. but phone/video sound is harder to tell.
As far as rebuild or get a rebuilt or put a used from the yard, it all depends on costs and what you expect to make off it.
Cuba's Automotive might just fill it up with Lucas and take it to Carmax, collect a check and save a head ache 🤷🏻♂️
@@HomieHektor 😂😂😂 at least get your money back. That sounds like a plan
Happy holidays homie to you and your family
My truck does the same thing but it’s more a tap tap tap
Put each cylinder a tad bit after TDC and use a long screwdriver to push it down. If it indeed moves a bit. Then the rod bearings are junk. I use this method on many vehicles that I suspect lower end
Put an engine in it and tear this one down so we can see what it is and yes sounds like a piston knock
I had the exa c t same thing with a 06 I bought . Within a week it was knocking . The rod bearings were shot
To me, doesn't matter what it is specifically. It's 100% bottom end noise. Rodknock is my opinion, but again, all I need to do is differentiate lower end noise, from top end noise. The engine needs to come apart, specifically the bottom end, it will show its signs then.
+1 on rod knock.
If you drop an engine in it, can you break the old one down? See where it nuked itself?