Thread: my new rebuilt 350 knocks

Tweet

i just built a 350 4 bolt main had the block and crank taken to machine shop had it cleaned honed and new cam bearings and freeze pluck put in. the crank was turned 10/10 put in the same stock pistons back in with new rings (top is molly) put my heads off of my 305 iroc engine that i had rebuilt and ended up throwing a connecting rod. It sounded like i had valves knocking so i figured that maybe there were some bent valves because of the fact that i threw the rod bearing on the motor the came off of. so i took my LT-1 heads to the shop and had manley 202's and 160's machined in i put those on and still valve clatter ive put in a cam from summit racing (sum_1105) new stock pushrods and new sealed power hydrolic lifters. I feel that I have done everything correctly putting it together several times now and still valve clatter. can someone clue me in on why this is happening and what i need to do to fix it?

is it valve clatter or piston knock?

im betting its valve clatter

Once again, it sounds like the back cam bearing is not letting oil past it to the lifter galleys.

now there is a possibility cuz when i primed the oil pump it only would prime the drivers sid lifters or is that normal? they are pumping oil now though but it still clatters

Sounds like the rear of cam oil galley/port is blocked