I'm about to replace the failing valve stem seals in a stock 1971 Fj40. I've read countless posts about the process on the later 2f engines but not much on the 1f engines. Can the "improved" 2f engine valve stem seals be used on the 1f engine?
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I think the new 2f ones are suppose to work and are "better" from the post I've read. 1f seals can still be found here and there, maybe still being produced, but the 2f ones are apparently a better design. I too need to do this eventually. I've been driving around with at east one bad valve stem seal for about 7 years. Tons of smoke on start up so oil is burning from my tailpipe 
Ill will be interested to see what everybody else says about the 1f seals.
Ill will be interested to see what everybody else says about the 1f seals.
