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robert2323 · 02-12-2010, 02:38 PM

1969 Chevy C20 with GM Goodwrench 350. Frustrating situation. Bought a remaned distributor, installed it and when I fired it I had an extremely loud engine noise. Sounded like a sledge hammer banging against steel. Diagnostics being my weak suit, I assumed rod knock. Pulled pan and checked my bearings. No metal flakes anywhere, found one bearing with the slightest of play. The bearing had a wear spot in it, so repaced it. I installed everything back togheter, new oil (10w30) and filter and fired again. Still loud knock. The parts guy at Kragen said there was no way that distributor would make a loud knock. Being baffled, I've pulled heads to look for broken piston, but nothing obvious there either. I have a friend giving me a chevy 350 distributor today (after buying a head set and reinstalling top end). Any advice would be graciously welcome, because I'm at a loss, feeling like a jackass taking apart a perfectly good long block.

02-12-2010, 02:38 PM	#1
robert2323 Registered User Join Date: Nov 2009 Location: Redding, CA Posts: 1	sources of engine knock? 1969 Chevy C20 with GM Goodwrench 350. Frustrating situation. Bought a remaned distributor, installed it and when I fired it I had an extremely loud engine noise. Sounded like a sledge hammer banging against steel. Diagnostics being my weak suit, I assumed rod knock. Pulled pan and checked my bearings. No metal flakes anywhere, found one bearing with the slightest of play. The bearing had a wear spot in it, so repaced it. I installed everything back togheter, new oil (10w30) and filter and fired again. Still loud knock. The parts guy at Kragen said there was no way that distributor would make a loud knock. Being baffled, I've pulled heads to look for broken piston, but nothing obvious there either. I have a friend giving me a chevy 350 distributor today (after buying a head set and reinstalling top end). Any advice would be graciously welcome, because I'm at a loss, feeling like a jackass taking apart a perfectly good long block.