95 LS2 engine noise

Hi all.

Just found the group and am inquiring for a friend. He has recently had his
engine rebuilt. When he got it back from the shop, it had, and still does, a
lot of top end noise. At first we thought it might be the valve/rocker
clearance was not set right but being a DOHC, there isn't any clearance
there. We also didn't have the means to pull the engine so we couldn't check
to make sure everything was torqued right. After a closer listen to the
engine, it soulds like it could be a connecting rod. It sounds like a loud
tapping noise. Any suggestions? Any info. would be greatly appreciated.

Thanks in advance,
Brad

 

Hi, Brad,
Not that I'm anything resembling an expert, but I've heard that symptom
described in association with a timing chain problem.
Good luck!

 

Just found the group and am inquiring for a friend. He has recently had his

Just to rule other things out, you might try pulling the accessory belt,
starting the engine and listening to see if the sound is still there.