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By 29abone - 14 Years Ago
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 I have my heads off, looks like a recent valve job was done, but that was several years ago, and I'm thinking that I should replace the valve seals as they are probably getting rotten. Replace intake and exhaust or just intake? What would be the best ones to use? Engine is a 1957 312.
Thanks,
Larry
56 f100 bw
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By lovefordgalaxie - 14 Years Ago
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If you have the heads off, it's a good idea to replace the seals. If you can do it yourself, better yet, because probably the labor would cost more than a set of seals.
Replace them all, better safe than sorry.
A good choice would be going for vitton seals, as they last longer, and seal better. John Mummert should have them for sale.
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By DANIEL TINDER - 14 Years Ago
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[quote][b]lovefordgalaxie (4/19/2011)
A good choice would be going for vitton seals
Then you will likely need to have someone machine the guide bosses, or buy the special tool to DIY.
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By Craig Seyfried - 14 Years Ago
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Hi Daniel I used some umbrella seals from Mac's parts, or you could use Perfect Circle seals but the valve guide would have to be machined to accept the P.C. seals. You should also check the wear on the valve guides when you have the springs off and check the condition of the valve seats and condition of the valves plus the valve spring tension. If you are just doing a freshen up and are not racing it all you would need to do is check the guides and put new umbrella seals on the valve stems. If the guides aren't real sloppy you could easily put new seals on the valve stems. Check to see if the old seals are hard as a rock. The seals should be soft and pliable if not replace them.
Andy of Mayberry
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By Craig Seyfried - 14 Years Ago
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29ABONE sorry I called you Daniel seems like everyone who responded to your question has great ideas. Andy
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