I've been hunting the cause of a severe oil leak in a '73 camper van. The engine was nearly new - 3000 miles when it was sold to us and 2000 since. I replaced the small crankshaft seal, to no avail.
Upon more investigation, I found the #1 cylinder wasn't firing. Compression check gave 30-50 psi - less, the more I futzed with it. I poured some oil in the cylinder and it didn't improve the compression at all. Ok, valves!
I popped off the valve cover (cold cold engine) and had a look - all of the rocker arms were severely tight! Like, I had to back them off a few turns just to get them clear of the valves, when they were "closed". Listening to the engine crank, I could hear a pop-pop-pop-foosh! I now believe the #1 exhaust valve was burnt out in the classic "valves too tight" chain of events.
So, a few questions - first, did the guy that sold me the engine screw me? The engine has been in the van for a while, but has only a few thousand miles on it since it was installed. Could the valves have gotten this out of whack in that short a time? I'm sorting out my recourses right now...
Second - can you remove the cylinder head with the engine in the car? It would save me a lot of hassle, obviously...
Third - can anyone think of a reason this would cause an oil leak? I'm hoping against hope that it's not a burnt/siezed rings situation - all the other cylinders are firing just fine, though I haven't compression checked them all (cheap checker is a bear to use through the fan shround... )
What sort of flow should I observe out the PCV hose?
Jeez, thanks, anyone that can answer this stuff, I'm floundering for a solution.
Elijah