Re: 1941 One Eighty - curious engine problem

Posted by Owen_Dyneto On 2011/1/14 9:11:01

A bit of a long shot, but if the engine had a valve grind recently, perhaps whoever did it forgot to re-establish the clearance for the hydraulic lifters? When you grind the valve seats and faces, the valve stem drops closer to the lifters, and the clearance of 0.030 to 0.070 must be maintained for proper lifter operation. Failure to do this could result in some (all?) valves not closing completely. It's all covered very nicely in the shop manual, the the gauge block is readily available.

And an observation, 6 psi fuel pressure is out of range and too high.