cylinder heads

[j66b]

Do any of you slicksters out there have any thoughts on prolonging the life of the valve seats in older engines which now have to use unleaded fuels? thanks, j66b

[ICEMAN6166]

you can have hardened seats installed in the heads

[bruceandersson]

I've never installed the hardened seats. My understanding is that with the use most older vehicles get, they never have the time to erode.

[ICEMAN6166]

you can also use the bottles of lead substitute, and a bottle of marvel mystery oil added to a tank of gas provides upper end lubrication as well.