Tramminc

LS motor knocking - YouTube

Sounds mechanical, or can it be tuned out.
C5R motor, LS7

01CamaroSSTx

iTrader: (3)

What was the oil pressure like when doing this? Although it does sound valve train related I'd try to pinpoint just exactly where the sound is coming from. Also I'd inspect the engine oil and cut open the filter and examine the filter element looking for any signs of bearing material. You could also get an oil analysis and that will tell you if it's bearings or not. Anyway that's where I would start.

Tramminc

no broken valve springs. I thought it was bad lifters, installed new ones, oil pressure is 30 at idle raises while revving.

slothman

oof. sounds like rod knock to me. I would do a compression test. and look at the oil for metal.

Tramminc

Looks like copper pieces and others in bottom of oil pan.

Tramminc

Will be sending the bottom block out to be rebuilt

slothman

sorry to hear that man. go with some nice forged parts on the rebuild ! may low compression for boost !

Tramminc

cylinder #1
builder found the knock, I told him to check everything

Tramminc

All the bearing need replaced. So much for not driving it in 14 years, only starting it every month or two.

Che70velle

iTrader: (6)

If your REMOTELY interested in selling that block, send me a PM.