Nothing wierd re: the valves... they were actually a bit loose, not the nuts but the clearence. I adjusted and got the same compression.

I understand the concept of a leak down test but have never done one. Should just turn the engine till the valves on No-1 are closed and hook up the compressor and listen... is that it? How will I tell if air is escaping from the bottom end?

How likely is it that this could just be the head gasket? or am I just dreaming.

Thanks
Steve

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