For anyone that has replaced the valve seals in a Olds 307 mine is an 86' so I am looking for the best quality valve seals that will fit stock heads without issues or modifications.
86' Olds 307 valve seals
- Thread starter 565bbchevy
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The stock seals are pretty much indentical between brands, the same hard nylon seals. Just buy the ones for the best price. I am sure glad someone spent the time and upgraded to the positive seals on the last 2 sets of Olds heads I bought, which require machining to the guide. There are white and black seals, one must be intake, the other exhaust. Both fit the same.
I bought the Fel Pro ones a while back, I guess I am just used to the performance style seals because I look at these and think how can these huge hard nylon pieces possibly seal a valve, the only stock ones I have replaced were years ago in a SBC with umbrella seals.
I agree, not the greatest design. Look for melted or broken seals. My 307 headed 350 Olds was puffing blue smoke on start up like a 70's sbc. I found all the center exhaust seals melted, Olds have that huge exhaust cross over in the head, makes a lot of heat. I also found a couple missing chunks. Doing in truck in with compressed air wasn't so bad.
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