pastorjeep
Full Access Member
Hopefully today I will pull them off and see if I can spot anything without removing the valley pan yet.
BTW, do yourself a favor when you do so... don't bother putting valve stem seals on the new heads. My own testing shows it doesn't cause smoke, and no noticeable oil burning, but it should lube the valve guides more than now which should make them last a lot longer.
All of the heads I've seen have lots of carbon buildup on the intake valves, whether the seals were intact or not. I attribute this to the fact that you are sucking engine oil down the intake tract(via the CDR), not the valve stems.Btw, doing so will cause excessive amounts of oil consumption and carbon buildup on valves, especially on a worn engine. I've seen many idi cylinder heads with shot valve stem seals and the carbon buildup is unbelievable. Imagine if they didn't have them
This goes the other way, though. Up through the guide and out into the valve cover chamber.Don't forget about boost pressure on intake valve guides causing blowby for a turbo engine.