The Ford Barn

Special Coupe Frank · 06-21-2016, 05:20 PM

If refacing the valve seats in the block ( for new, Stainless valves, etc. ), is it worth-while to go for a 3-angle grind, or just stay with the original-style single-angle ?

Block is a diamond-block with hardened seats on the exhausts.

Thanks !

Frank

Ron W · 06-21-2016, 06:08 PM

I went with 3-angle. I used at least 1/16 to 3/32 flat contact surface. Seems OK so far.
Ron W

Patrick L. · 06-21-2016, 06:41 PM

Original was a single angle ?

Three angles are needed and need to placed correctly for proper seat width [.060-.080" intake and .080-.090" exhaust]and location on valve face. There should be a lot of info in archives or search.

jetmek · 06-21-2016, 06:45 PM

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3 angles are needed to get correct contact . My experience has been you seldom need to narrow it from bottom mainly need the 60 and 45

06-21-2016, 05:20 PM	#1
Special Coupe Frank Senior Member Join Date: May 2010 Location: Northeast Penna Posts: 2,108	Re-facing valve seats in block: seat angle ? If refacing the valve seats in the block ( for new, Stainless valves, etc. ), is it worth-while to go for a 3-angle grind, or just stay with the original-style single-angle ? Block is a diamond-block with hardened seats on the exhausts. Thanks ! Frank

06-21-2016, 06:08 PM	#2
Ron W Senior Member Join Date: Jan 2011 Location: Central Me. Posts: 260	Re: Re-facing valve seats in block: seat angle ? I went with 3-angle. I used at least 1/16 to 3/32 flat contact surface. Seems OK so far. Ron W

06-21-2016, 06:41 PM	#3
Patrick L. Senior Member Join Date: May 2010 Location: Largo Florida Posts: 7,225	Re: Re-facing valve seats in block: seat angle ? Original was a single angle ? Three angles are needed and need to placed correctly for proper seat width [.060-.080" intake and .080-.090" exhaust]and location on valve face. There should be a lot of info in archives or search. Last edited by Patrick L.; 06-21-2016 at 08:03 PM.

06-21-2016, 06:45 PM	#4
jetmek Senior Member Join Date: May 2010 Location: albany Posts: 487	Re: Re-facing valve seats in block: seat angle ? Sponsored Links (Register now to hide all advertisements) 3 angles are needed to get correct contact . My experience has been you seldom need to narrow it from bottom mainly need the 60 and 45 __________________ engine and component overhauls my specialty! Website- www.godevilgarage.com