We've all been zeroing in on the valve guides, which Jim reckons are fine (I think).

What about giving the whole engine compartment a good clean-up (degrease it), and then observe the engine block and seals/gaskets for any minor/microbe leak? Sometime it could be a very fine leak - so much so that whatever excess of it burns up with the engine heat.

A probability if we assumed the valve guides are fine?

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... Kerry

126 tailed by a 203, 129 leading the pack.