I did the valve seats myself with a home made tool to get the valve keepers off/on (search on the forum and there are pics). The seals are a piece of cake, the *seats* on the other hand, require some pounding, lapping, and potentially grinding of the valves. Was there a specific problem with low compression caused by a bad valve? also, is the head warped (thus requiring resurfacing)?

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89 300te 222,222
92 300e 190,000