I have a 292 chev that has been rebuilt twice and still has the same knock. The last rebuilt replaced pistons, pins, rods, machined all bearing surfaces and everything else was new. The only thing not new was the Comp camshaft (very Mild). It had less than 300 miles from the first rebuild, so they just instaled new lifters. Could it be possible that the notches for the rod clearence was not machined right by comp cams. Has anybody had a clearence problem? Also, might note that the knock is louder when the engine is pulling. Any help would be great... not looking forward to tearing down this engine a third time.
