1991 OCC. Changing valve cover gaskets as part of preventive maintenance. Understand that by 1991 the differences between the Chevy 305 and Olds 305 were gone in favore of a "corporate". Rather than sandblast and paint original valve covers came across these but they're speced for SBC 305. Will they fit without problem?
They will "fit" but I only see one large hole in each cover. The driver side needs a smaller hole for the PCV Valve. Been a long time since I was under the hood of a TBI car but I believe the passenger side has a smaller hole in the factory one as well.
Subject: Re: Valve covers Wed Apr 21, 2021 9:26 am
good point, 94Woody. The 91 305 has a PCV grommet in each side. What's missing from these is the oil filler cap opening. They won't work. THX
Posts : 5985 Join date : 2009-11-13 Age : 72 Location : Largo, FL 33774
Subject: Re: Valve covers Wed Apr 21, 2021 10:59 am
You can use a different oil filler. They make them with grommets on the valve cover, and a push in cap. I have that style of filler on my 454. The issue with these is that the extra hole would look odd without the "flat" to mount it.