1fortyfanatic said: (quoted from post at 22:41:21 05/11/08) Teddy, I re-state that it is unlikely that a bad gasket could lead to "screwy" compression readings, but even you have admitted, that it is possible. To quote you in one of your earlier posts:
"The only thing running without manifolds will do is eventually burn the valves due to the heat not being carried away from them through the manifold."
Then in this last post, you state...."If the valves are not closing that either means you have poorly adjusted tappet gaps, burnt valves or....."
So, I hope you understand that my point was, as you have already stated, that A can lead to B.
Now with that said, while extremely enjoyable, none of this discussion between you and I is really of any help to francois in his original post. But it has kept me on my toes tonight :D
Dave
The "A" you listed will not lead to the 'B" you are inferring unless the headgasket could have a 1 or 2 inch round hole for a leak. A simple gasket leaking would not be a big enough problem to burn the valves. It would take running without an exhaust manifold for a period of time to burn the valves. You are missing the point here. I do not know how else to say that a leaking manifold gasket would not cause a compression test to give any different results. You could take the manifold completely off and still get the same compression reading.
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