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**mattfranklin** · 10-12-2017, 10:54 AM

There is a tool you can use to machine down the outer valve guide diameter to fit the positive valve stem seals if you want them. Fits in a drill. I've not yet had to do that myself, but there are youtube videos on it. I think Comp Cams is one of the companies that offers it.

10-12-2017, 10:54 AM	#19
mattfranklin Senior Member Join Date: Dec 2011 Location: Moraga, CA Posts: 799	Re: Need advice on fixing broken rocker stud on Big Block.. There is a tool you can use to machine down the outer valve guide diameter to fit the positive valve stem seals if you want them. Fits in a drill. I've not yet had to do that myself, but there are youtube videos on it. I think Comp Cams is one of the companies that offers it. __________________ (Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 Last edited by mattfranklin; 10-12-2017 at 10:55 AM. Reason: typo