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Since you say you want to keep this rig running for another 100K you are probably going to need to replace the heads at some point. It is a much more time consuming job but you could probably do it yourself and be more sure that the engine is good for another 100K.

Some may disagree but it is at least worth considering.


I'm not surprised to hear that suggestion, and I'm aware that valve seals might not be the (only) problem, but I'm willing to throw this dart in an attempt to fix it before I part with hundreds for new heads. Plus - If I do decide I need new heads I will probably feel better about the job having done the seals previously.

Leaks are substantial - the trans is ALWAYS soaked. If I can stop most of those, and make some improvement replacing old valve seals I would like to think the oil consumption would be improved significantly.