Re: 23rd Series 356 Engine Noise

Posted by Owen_Dyneto On 2008/12/5 14:21:07

Lifters can't "overpump" and push the valve open, not enough hydraulic force to push the valve open against the valve spring. If I had to guess, I'd say either the cam lobe wasn't completely down before checking the stem to gauge clearance, or you either didn't keep the valves in the same order as they were removed, or didn't lap the seats on the valves you replaced.

Why not just do a thorough valve job by the book and be done with it?

Also when you replaced the rings, since the block wasn't bored you must check the ring end gap at the smallest portion of the bore. I don't see this as the cause of the problem unless you didn't and the rings immediately broke.