.....plus 10. It's hard to diagnose noise sight unseen. Get it to a shop asap.
help engine noise!!
Thread Starter
Intermediate
Joined: Mar 2010
Posts: 27
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From: MELBOURNE FLORIDA
help engine noise!!
Hello,
I just bought my first c5- a 2002 Z06 with 17,000 miles. When I first start it up the lifters are loud for a period of time then quiet down a bit, but always seem to hear them is this normal?
Also as the engine gets warmer I have a bearing noise (drives me crazy -everyone asking what's wrong w/ it). I thought maybe the belt tensioner, but that feels good and spins fine without and noise? I pulled the belt off and that did take the noise away....(also have a new dealer installed belt) I do have some movement in another tensioner- The one on the drivers side of the harmonic balancer (not sure the correct name for the part) but the belt goes up over and down around it looks like a tensioner, but does not move back & forth. Would really appreciate some help. Thanks!
I just bought my first c5- a 2002 Z06 with 17,000 miles. When I first start it up the lifters are loud for a period of time then quiet down a bit, but always seem to hear them is this normal?
Also as the engine gets warmer I have a bearing noise (drives me crazy -everyone asking what's wrong w/ it). I thought maybe the belt tensioner, but that feels good and spins fine without and noise? I pulled the belt off and that did take the noise away....(also have a new dealer installed belt) I do have some movement in another tensioner- The one on the drivers side of the harmonic balancer (not sure the correct name for the part) but the belt goes up over and down around it looks like a tensioner, but does not move back & forth. Would really appreciate some help. Thanks!
Tech Contributor
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From: Dyer, IN
Former Vendor
Joined: Apr 2006
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From: Portland OR
St. Jude Donor '10-'11-'12
Are you sure its lifter noise and not piston slap?
IIRC GM in the owners manual at 100k says to check or replace them (lifters) so at 88k your getting close to that mark obviously.
The bearing noise ( squeal I'm guessing) could still be the tensioner, just needs a load n it to produce the noise is why you don't hear it when you turn it by hand maybe.
IIRC GM in the owners manual at 100k says to check or replace them (lifters) so at 88k your getting close to that mark obviously.
The bearing noise ( squeal I'm guessing) could still be the tensioner, just needs a load n it to produce the noise is why you don't hear it when you turn it by hand maybe.
Tech Contributor
Joined: Jan 2007
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From: Dyer, IN
Thanks......
http://www.gmpartshouse.com/download...02corvette.pdf
Former Vendor
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From: Portland OR
St. Jude Donor '10-'11-'12
It was in the owners manual that cam with my car when I was looking through the maintenance suggestions section, 15k ,30k etc
I'll see if I can find it anywhere. ( But thats why I put IIRC as a disclaimer ..LOL just not totally sure)
I'll see if I can find it anywhere. ( But thats why I put IIRC as a disclaimer ..LOL just not totally sure)
Tech Contributor
Joined: Jan 2007
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From: Dyer, IN
I attached a 2002 owners manual for you. You can also go to GMpartshouse.com.......and download any year c5 manual.
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Thread Starter
Intermediate
Joined: Mar 2010
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From: MELBOURNE FLORIDA
Thanks for your suggestions-took the vette to our local corvette guy who stated engine is fine... has piston slap when first statred up and last for about 2-3 minutes or until warmed up awhile and then will go away. Also, was told that I need an upper belt tensioner pulley and a new belt ( I wouldn't think after 17,000 miles) that this would be the case, but I will roll with it as from what tech is saying these are common issues on a LS6.
Pro
Joined: Nov 2005
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From: Fresno CA
Thanks for your suggestions-took the vette to our local corvette guy who stated engine is fine... has piston slap when first statred up and last for about 2-3 minutes or until warmed up awhile and then will go away. Also, was told that I need an upper belt tensioner pulley and a new belt ( I wouldn't think after 17,000 miles) that this would be the case, but I will roll with it as from what tech is saying these are common issues on a LS6.
Drifting
Joined: May 2007
Posts: 1,515
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From: Gig Harbor WA
Interesting that you said you "just bought it," and no one said to take it back to where you got it and have it checked out. Private sale?
As for the tensioner, I had one go bad on my 1500 Chevy pickup at 13,700 miles. The whole thing shattered doing 5mph in a parking lot -- instantly lost all power steering, brakes, and coasted into a parking space. Scary since 5 minutes earlier I was doing 70mph on an interstate.....
As for the tensioner, I had one go bad on my 1500 Chevy pickup at 13,700 miles. The whole thing shattered doing 5mph in a parking lot -- instantly lost all power steering, brakes, and coasted into a parking space. Scary since 5 minutes earlier I was doing 70mph on an interstate.....
Former Vendor
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From: Portland OR
St. Jude Donor '10-'11-'12
Ok did some checking through my manuals and could not find it so I must have been dyslexic or something and misread that you should swap them out if your going to a new cam... Although I can swear I read it in a repair manual, sorry guys wasnt the service manual didnt mean to lead anyone astray.
Although I did get the piston slap right
Although I did get the piston slap right
Team Owner
Joined: Mar 2001
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
All I can say is WOW
I just have to shake my head at some of this input...
to the op, If youtook the drive belt off and the noise stopped then its one of the component of the drive belt system, my guts says its the idler pulley of the Belt drive system but then hey what do I know...
Piston slap.. the motors have been tested to 200,000 miles,,I have a few guys who keep in tough with me via PK with over 300,000 miles, motos have never been opened..
As Ive said in other posts and threads... not following the OLM, or changing every year , which ever comes first will cause bearing wear both rods and mains.. it will also cause premature wrist pin damage which causes piston slap.. so make sure you change your oil and use the GM spec oil.. because it has the precises addative package for the dynamics of this engine. If you or your grandfather knows more about this care than we do , then you deserve what you get....
to the op, If youtook the drive belt off and the noise stopped then its one of the component of the drive belt system, my guts says its the idler pulley of the Belt drive system but then hey what do I know...
Piston slap.. the motors have been tested to 200,000 miles,,I have a few guys who keep in tough with me via PK with over 300,000 miles, motos have never been opened..
As Ive said in other posts and threads... not following the OLM, or changing every year , which ever comes first will cause bearing wear both rods and mains.. it will also cause premature wrist pin damage which causes piston slap.. so make sure you change your oil and use the GM spec oil.. because it has the precises addative package for the dynamics of this engine. If you or your grandfather knows more about this care than we do , then you deserve what you get....
Last edited by Evil-Twin; Mar 23, 2010 at 04:00 PM.
Tech Contributor
Joined: Jan 2007
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From: Dyer, IN
Ok did some checking through my manuals and could not find it so I must have been dyslexic or something and misread that you should swap them out if your going to a new cam... Although I can swear I read it in a repair manual, sorry guys wasnt the service manual didnt mean to lead anyone astray.
I'm just wondering, because you must have read it somewhere, and frankly, I've never heard it before(freely admitting that just because I don't know about it, doesn't mean it's not true).
Thanks,
Racer
Joined: May 2009
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From: Cincinnati OH
Thread Starter
Intermediate
Joined: Mar 2010
Posts: 27
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From: MELBOURNE FLORIDA
Interesting that you said you "just bought it," and no one said to take it back to where you got it and have it checked out. Private sale?
As for the tensioner, I had one go bad on my 1500 Chevy pickup at 13,700 miles. The whole thing shattered doing 5mph in a parking lot -- instantly lost all power steering, brakes, and coasted into a parking space. Scary since 5 minutes earlier I was doing 70mph on an interstate.....
As for the tensioner, I had one go bad on my 1500 Chevy pickup at 13,700 miles. The whole thing shattered doing 5mph in a parking lot -- instantly lost all power steering, brakes, and coasted into a parking space. Scary since 5 minutes earlier I was doing 70mph on an interstate.....
Thanks!
Former Vendor
Joined: Apr 2006
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From: Portland OR
St. Jude Donor '10-'11-'12
Ok......can you tell me ANY production GM V8 engine made for a passenger car or light truck in the last 20 years, that requires the lifters be changed at 100K miles?
I'm just wondering, because you must have read it somewhere, and frankly, I've never heard it before(freely admitting that just because I don't know about it, doesn't mean it's not true).
Thanks,
I'm just wondering, because you must have read it somewhere, and frankly, I've never heard it before(freely admitting that just because I don't know about it, doesn't mean it's not true).
Thanks,
so I'll say I did not recall correctly. It happens from time to time. ** Found it***** IT was from a mech on a european Car performance site..LOL I was doing a few things at once and jumbled it all together ..Sorry for the confusion.
been crazy here for a few weeks. " Actually, you should replace lifters every 100,000 miles...it's a good way to keep the engine happy."
that was the end of what he was saying
Tech Contributor
Joined: Jan 2007
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From: Dyer, IN
Myth #12
Adding a quart of ATF the day before an oil change will clean your engine. ATF added to the motor oil will clean the engine due to the high levels of detergent in ATF.
Fact
ATF does not contain detergent chemistry. ATF does contain dispersants, which have properties similar to detergents. But ATF is not formulated to withstand the combustion environment inside the engine. We recommend that you keep the fluids where they belong: motor oil in the crankcase, and automatic transmission fluid in the transmission.