Oil cap looks moist. Should I be worried?

[Gilles]

Originally Posted by JFP in PA

Possibly, but the water could be coming from an internal source as well.

Bad O-rings on the heat exchanger could be the cause for this issue as well..?
.

[911monty]

[QUOTE=Gilles;631655]Bad O-rings on the he heat exchanger could be a cause then, right?
.[/QUOTE

NO. This is physically not possible. 4 O-rings that contain pressures greater than atmospheric (oil at 15-50 psi and coolant at ~18 psi), cannot leak into each other separated by 2+ inches through the atmosphere @0 psi (14 psia) unless the O rings were gone and the leak was so bad they drained into the other from residual on the engine. But then I think the fluid on the ground would be hard to not notice.


Edit If I ruined a long standing joke like foglights then I apologize.

[flmont]

hopefully you have some oil that you could send out to get analyzed might help find the answer..

[djw8282]

Could be a cracked cylinder head..I would get it checked out before it gets worst.

[CharlesE]

Replying to my old dead thread just in case someone stumbles upon this thread...

The coolant leak I had ended up being a very small crack in the expansion tank.
Replacing it was a PITA but after that my coolant hasnt leaked.

My AOS also went bad shortly after this post.