rusty bolts
Petty Officer 2nd Class
- Joined
- Aug 20, 2004
- Messages
- 148
1987 460 FORD OMC I think its a valve or head gasket . or both The compression on two adjacent cylinders are at 110 ONE CYLINDER COMES UP WITH A LITTLE OIL to about 120 the other stays the same .The others cylinders are all close to 135 . ther is no water in the oil .Would you think head gasket or and a bad valve .The motor will go pop pop once in a while i was told that the valve will turn when running and may have a carbon on or i think rust because of water either way is it time to pull it apart ? if so what will be looking for Thanks for any input