Hardened Valve Seats

C

Charlie Stephens

Well-known member
When did Ford engines start coming from the factory with hardened valve seats? Is there any difference between a valve seat and a hardened valve seat? Did the Model B "diamond" engines have hardened valve seats?

Charlie Stephens
 
Last edited:
We install hardened seats in all our rebuilds. Most blocks have been rebuilt more than once, and there isn't enough original material left for a simple dressing of the seats.
 
Ive seen a couple of factory relived engines, with Exhaust hardened seats.
As i understand it Factory Reliving was for the truck's.
 
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