JasonAndreas

If you don't find anything out of the ordinary with your valve-train then check your hydraulic chain tensioner on the left side. When they fail (busted spring/blocked orifice/installed backwards (don't ask)) it also sounds exactly like your engine except the noise happens at all RPMs.

Eli K

Yes, the noise can be heard at all RPMs on my car as well...

PC2

Siberian - Any updates to the cause of the loud valve noises?

Rally Guy

Sorry to revive a VERY old thread - but this was really useful - the sound clip is very similar to how a car I've found, and I want to buy, sounds.

Any resolution to this issue for the original poster's issue? Any one else have (and solved) a similar issue?

Thanks in advance,

RK

Guards964

I couldn't get the sound like to work...

Scott
'92 Guards Red C2

Rally Guy

Here's the direct link - working for me...

https://www.sharemation.com/karchov/BAD_ENGINE.mp3

RK

BlueHeeler

Sounds like a sewing machine. I hope it is not too bad.

Rennen

I had a very similar sound two years ago when, of all things, one of the locking nuts on a valve adjuster came off when I over-reved at VIR. I took the car home and ran compression, leak-down, and also inspected the cylinders with a borescope. All was fine. Once I took the valve covers off and found the loose nut, I performaned a full valve adjustment, buttoned it back together, and it ran fine. I hope yours is something similar. I learned a good lesson about not assuming the worst and being methodical with that mishap. Good luck!

BTW, I now own a borescope. Don't know where you live, but I can bring it by for a look-see if you're close.

Rally Guy

That's a great story, Rennen - here's hoping!

I'm going to send the car for a PPI - get the comp and leak down #'s to be sure. Regrettably - I'm in Toronto and not nearly close enough - thanks though!

I'll report back on how things turn out.

RK

rob964.c4

i have got the same sound now,
after some one borought my car

my car is going to the garage this week,


keep you posted,


robert

AlfredF

Rob,

I'll hope Erwin will find also a lose nut like Rennen and everything will be OK without damage to your engine.

Good Luck,
Alfred (ook uit Nederland)

Wachuko

Updates?

rob964.c4

for mine no update yet,
it has to be picked up to night or tomorrow.



robert

rob964.c4

car was being pick up yesterday evening, i was not around.
First short conclusion,

cilinder 4 is not working properly
today al leak test on cilinder 4 and lets see what happens then.


robert

rob964.c4

so an update:


two valve rockers are broken, most likely due over reving.

that really hurts now because somebody took my car to wash it en when he got back, the problem was there.

i will post pictures later on.


robert