| Compression over 160 all cylinders so can't be piston rings, head intake valves are free of oil when checked with a camera passed through opened throttles and transfer tube plenum holes. I don't think it shall come form heah gasket so I will remove exhaust manifold and guess that I will find out oil in the exhaust valves cylinder 6 which spark plug had oil on tip...the 4 one tip was black color but dry... The pain in a neck job is to open all front of engine to remove sprocket, cam and timing belt. Anyone used to have same problem and know a trick to save labor time? Like TUFOIL or anything similar in the engine oil that will boost the valve seal material size ? I used to hear many years ago that automatic transmission oil had this boost effect on rubber seals... Thanks
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