Re: Aren't 230 & 251 exhaust seats hardened inserts?


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Posted by Russ on Wednesday, March 21, 2001 at 12:40PM :

In Reply to: Aren't 230 & 251 exhaust seats hardened inserts? posted by Brian in Oregon on Wednesday, March 21, 2001 at 11:41AM :

When I had the 218 engine for my '40 VD-21 machined, I had stellite inserts installed under all of the exhaust valves. There were non in place before this. I believe the premium truck and industrial engines with sodium filled exhaust valves all came with inserts. The other engines may have had their exhaust valve seats heat hardened, but did not have actual inserts. Does anyone else have the real story on this?



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