OK, weird one here. My 1990 62 had an oil filler cap that was terrible hard to screw on, so I thought it was a poor aftermarket fit. The gasket was on it was as hard as a rock anyway, so I ordered a new one from the dealer.
It fits even worse than the first one, which I now think is original. Any ideas? I have to really crank on to get the gasket to compress, and my father could not even get it off after I put it on. Crazy I say.
Clean the "CRUD" out of the threaded area of the valve cover.
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'73 FJ40- F power plant- " HI-Ho, Silver Away!" "puff "of blue smoke on start-up, "puff" of black smoke when I frog it, but I'm work'n on it! (It's All About Love! )
" HI-Ho, Silver Away!" 
"puff "of blue smoke on start-up,
"puff" of black smoke when I frog it, 
but I'm work'n on it! 
(It's All About Love! )
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