2002 Z28 Rod knock? Lifters? See video below any info would help!
 

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Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

My iphone is under the car drivers side

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

This belongs in LS1 Engine Tech.

Moving.....

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

sorry, thnx

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

i almost wanna say it sounds like an exhaust leak...

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

Rv thats exactly what I thought also, I went to the muffler shop yesterday and he told me it was in the engine maybe I will just go get a second opinion. It is doing it less and less from yesterday and today

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

i would go for a second opinion. doesnt sound like anything valvetrain. could be piston slap, i guess, but my bet is still on exhaust leak.

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

Look, Im gonna be the naysayer and not go with the exhaust leak theory. Given the type of exhaust gaskets these cars use; how often does that really happen? Plus, an exhaust shop already said thats not it. I hope Im wrong, though.

Time to start looking at it more seriously before its really hurt (if not already).

Does it still make the noise with the belt off? (dont run it long, but rule out acessory drive noise). also, you can probably use a long handled screwdriver and listen to various parts of the block or heads and see what you can pinpoint as far as noise. Maybe narrow it down to up top, or bottom end.

Then, drain the oil into a CLEAN pan and filter it through some coffee or paint filters. Cut the oil filter open and look for happy metal flakes there too.

IF you get nothing, and are up to it; pull the tappet covers are check for bad rockers and bent pushrods. Other than that, its lifters or bottom end. (or, in my case when I had a similiar noise; bad camshaft. Factory cam had a defect and partially wiped a lobe off.)

http://www.facebook.com/media/set/?s...563.1598320401

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

Yep it sounds a lot like when Rod's cam wiped a lobe.

How's the oil pressure?

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

went to 2 different known mechanics today and they both said the same thing.... sticky lifter. I did a mobil 1 synthetic oil change the other day and its still around but not as much but im going to go with a sticky lifter. I have owned the car for 2 weeks so who knows how long the car sat before I bought it. Labor for this is insane so hopefully it might go away if its just sticking I was also told try this mystery marvel oil thing is it worth trying?

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

oil pressure im really not sure the oil tach just bounces but stays in the middle

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

if its a stuck lifter, maybe seafoaming the engine could help

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

I bought the marvels mystery oil you think that will help, I havent used it yet because I have to get rid of some oil

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

An oil change will NEVER fix a noise like that :lol:

That might be a lifter failure, but it's not a collapsed lifter. It could be a lifter that went sideways. Or it could be a bearing in the bottom end. Regardless, that noise is an indication of a serious engine problem.

Re: 2002 Z28 Rod knock? Lifters? See video below any info would help!
 

I Understand, I did the oil change because i bought the car 2 weeks ago and it needed one anyway. I am just confused because now it comes around for maybe 2 minutes then its gone sometime the entire day no noise