Re: Compression Results

Posted by PackardV8 On 2017/3/25 9:44:39

Do the EASY things FIRST!!!

At this point u really don't know (or never mentioned) valve lash. So one or more of the valves maybe running reall tite and all u need is a valve adjustment.

Altho pulling the valve cover on a flat engine is often almost as difficult as pulling a cylinder head there is no need to pull the head if valves are running tite and it only needs valve adjustment.

If u do pull the head i will echo Ross's warning above to NOT mill the head unless there is conspicuous problems.


The Leak Down Compression test procedures are alot of much to do about nothing. The standard compression test is as good as it gets for diagnosis.

There is another procedure to blow air or smoke thru the spark plug hole then to look or listen at the carb or tail pipe for evidence of the smoke or rushing air. I won't detail it at this time. But that will give more evidenceof exactly what the problem is BEFORE risking any unnecessary disassembly of the engine.