Originally Posted by zipper06
Before you pull it down do a cold compression check, then a hot compression check, it could be a lot of factors, too much piston to wall clearance, rings not properly file fit. I'm thinking that the rings may be wiped out and possible cylinders scored from way too rich. A well sealed cylinder will definately run hotter than a cylinder with a lot of blow by.
JMO
Zip.
Thanks Zipper.
I will run another cold test and a couple of hot ones tomorrow and post the results. I am concerned that the overly rich conditins may have washed oil off the cylinder walls and lead to some scoring or ring damage.
When the engine was fresh and run on the dyno, without the vacuum pump, there seemed to be a lot of pressure in the crankcase. I had leaks from the pan gasket, rear seal and intake gaskets.
Your statement about the tighter cylinders running hotter makes a lot of sense.
BTW, all cylinders seemed to be leaking to the crankcase only. I couldn't detect any intake, exhaust or head gasket leaks.