Quote:
Originally Posted by dave lincs
Geoff do a leak test first simple to do and will point you in in the right direction
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What Dave says ^.
All a compression test will tell you is either, compression not within spec, low compression, or no compression and that's all !
A leak test will let you know in what area to expect problems, to evaluate what is needed for further investigations ( and potential costs ) and as SD 1 says, whipping off the cam cover is quick and easy, it will allow you to see if all the valves and springs and followers are doing what they should from upstairs, though this is not a 100% confirmation of the valves being OK.
There are rare and unusual happenings with valves in the combustion chamber from burnt valves / seats, dropped seats, dropped valve heads, cracks between inlet and exhaust ports / seats and so on.
With symptoms that you have my son with the garage would do the above, plus checking in the combustion chamber with his camera.
He hates disturbing / stripping anything down until he is pretty certain that that's the only way forward.
None of these are particular to your engine, but given to let you know there are sometimes some weird happenings with engines.
Keep us informed, the investigations and results adds to the knowledge on here and can help others .