Fror the last month so with the car in Park I can hear a slight knocking that sounds like a bottom end knock from the LT1--165k miles btw


So the other day I was under WOT and I heard a high pitched screeeeam from the engine bay....no other sounds....

Now when I floor it to above 4k and let off I hear....noises...from the engine. But I havent noticed any loss of power or oil pressure...

I can still hear the knocking, and it might be louder, and it might not be.

I've spun bearings in carbed small blocks before and it is a lot louder than this.
But, I still think that might be it.

 

crap, that really blows.

If it was me, I'd bring it into a shop to diagnose it if you aren't 100% sure what it is, and stop driving it.

Brian

 

I would stop driving it as well. You can easily make things worse just like me. Check the sig.

 

I thought I had the same problem, but it turned out to be a cracked flexplate. But it wouldn't make the noise when my converter was engaged, only at idle, or when I let off the gas.

 

Check the oil filter and oil.

 

Thanks guys..I will definitely check the flexplate, as this sounds like a possibility. To the mechanic!

 

check your belt tensioner because at idle mine would make a noise and at wot on shifts it would screach. how many miles on the tensioner? if its stock i would look into that first before anything. im on my 3rd one in 3 years and i change the belt as well.

 

The screaming sound is scary. Cut open the oil filter and check it for metal and drain the oil and put a baby diaper or fine cheesecloth over the bucket and strain it for metal.
Don't drive it until ya find it.

 

Get an automotive stethescope and put it on the block and see if you can hear the knocking inside the block. That will give you a better idea if you would like to do a little diagnosing yourself. That tool is only like 15 bucks from autozone.