RSchanz
Full Access Member
Yes. This makes it MUCH easier to R&R your heads.
Yes cavitation and a pin hole are the same thing. The fix is to have the cylinder sleeved. You will have to tear the engine down to the bare block to have this done. A compression test won't help at all. the compression only goes up when the piston travels to the top of it's stroke which is above the level of the pin hole. A leak down test may work if the piston's below the pin hole. If the hole is toward the bottom of the cylinder, then the piston won't be able to travel down far enough to get the rings below it. Then you won't know of the air you're hearing in your oil fill is from the ring gaps or a pin hole.
So really the only way to determine if this is the actual issue would be to inspection/repair head gasket and put on new valley pan... then of course inspect any other obvious areas where a coolant leak may occur? If none of these things seem to be the issue then I have to assume cavitation?