I was faced with a similar situation with a set of old Edelbrock valve
covers. There really is only two solutions. If the block is old enough to
have a draft tube, use it w/a pcv valve and let the oil filler tube breather
cap (if the intake manifold has one) be the source of outside air. If it is
a "modern" block you don't have any choice but to cut holes. I was going to
put small holes in the rear-facing portion of the valve cover, weld in
fittings, and use hard line (polished or chromed) to connect to the pcv
vacuum source. I saw this done on a car and it looked very good - and the
holes in the valve covers were virtually unnoticeable. As it turned out, I
did neither of these. I decided not to cut/drill the old valve covers
because I didn't like my choices - so I went with aluminum valve covers that
have holes in them for pcv valves. I will plumb them together on the back
side of the engine and tee into manifold vacuum at the base of the carb.
For venting I used an Edelbrock Performer manifold with the proper casting
blank that allowed me to drill a hole to put in an oil filler tube and use a
vented filler cap. The baffles will help but I don't think they are
absolutely necessary. Be careful putting in the baffles plates. Most of
them come with self-tapping screws and they are easy to break off in the
valve cover. I generally don't use them because I don't like the idea of a
sheetmetal screw coming loose and potentially causing damage to the valve
train. -Bob
----- Original Message -----
From: <rchansle@us.ibm.com>
To: <oletrucks@autox.team.net>
Sent: Thursday, September 30, 1999 2:45 PM
Subject: [oletrucks] Corvette Valve Cover mods
>
>
> I have an old set of Corvette aluminum valve covers that I would like to
use on
> my small block. However, the Corvette covers dont have any holes for the
pvc
> valve or a breather. I was thinking of adding some holes somewhere in the
covers
> to allow for a pcv valveon one side and a breather/oil filler area on the
other
> one. Anyone have any advice on doing this? I assume if I do I will need
some
> baffle on the inside to keep the oil from spashing out the hole. Anyone
else
> ever done this?
> Thanks,
>
> Bob Chansler
> '56 3200
>
>
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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