GMPP BBC valve covers

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65Chevelle502
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GMPP BBC valve covers

Post by 65Chevelle502 » Tue Oct 05, 2010 10:10 pm

I have a set of the GMPP valve covers for a big block chevy. I need to drill them for pcv and breather. They are both 3/4". There are no baffles in the valve covers. Can I just use baffled grommets? I don't really want oil mist all over the place. Thanks

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Alan Roehrich
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Re: GMPP BBC valve covers

Post by Alan Roehrich » Wed Oct 06, 2010 11:48 am

The holes for standard grommets are 1.22", if memory serves correct. Baffled grommets will help, if you don't have a clearance problem, but they will not work as well as good baffles in a valve cover.

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