Board index Flathead Power-Technical Questions, Answers, and Suggestions Knuckles Valve guide tolerance?

Valve guide tolerance?

Post Wed Sep 01, 2010 12:56 pm

Posts: 19
Location: Valentine, NE 69201
What is the proper interference fit between guides and the head? All I could find in the manual is "tight." Surely someone has figured out a more scientific method than that.
It's a hard life if you don"t weaken.

Post Wed Sep 01, 2010 6:29 pm

Posts: 159
Cast iron guides in cast iron on any application about 1 / 1/2 to 2 thou interference fit.

Post Fri Sep 03, 2010 7:45 am

Sounds about right, and they should be re-sized after insertion since some crushing is normal.

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