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| | | Forums66 Topics128,042 Posts1,055,520 Members48,424 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Apr 2010 Posts: 126 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2010 Posts: 126 | I have a 63' 327 with the original road draft setup for the oil- with the breather cap on the filler neck on the front of the intake manifold. i have been looking around at a new intake manifold and the ones that i like the most do not have the hole for that filler neck/ breather cap. i replaced the old valve covers with new ones that have a breather cap on each one; would that be about the equivalent as the one on the front of the manifold? or will the new manifold still need some kind of vent in it? i know that air from the valley travels through the valve covers via the oblong push rod holes, so it makes sense to me that it should still function properly with the venting in the valve covers instead of the manifold. . . .right? o_0
66' Chevy C-30 Rat
| | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy BrianToste, if your valve covers both have venting in them, that should be adequate, hope that helps. | | | | | Joined: Dec 2003 Posts: 2,733 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 2,733 | Actually one will do fine so it is more than adequate. The only manifolds you will find with the oil filler tube in them are the originals or maybe some aftermarket ones from the day. They were changed after GM changed to using the valve cover. | | | | | Joined: Apr 2010 Posts: 126 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2010 Posts: 126 | ok cool. . .but where would i fill the oil at, take off one of the breathers and just dump it into the valve cover?
66' Chevy C-30 Rat
| | | | | Joined: Feb 2003 Posts: 452 Shop Shark | | Shop Shark Joined: Feb 2003 Posts: 452 | Yup. That's how a lot of V8s get their oil. Not sure if a plan breather is much different than a breather-oil cap or not... My dad's 318 in his Plymouth Satellite had an oil cap with a hose to th air cleaner. Just pulled off the tube mounted to the top of the valve cover.
Current fleet (subject to change w/o notice) \'49 GMC 3/4-Ton , 60 Austin Healey Frog-eye Sprite (some assembly required), 2011 Dodge Avenger, 2015 Jeep Cherokee. No, they don't all run. My other ride is a (B737)no, (B767)no, A320.... Update... was Embraer E190, now Boeing B787. Knowledge is a wonderful thing, but ignorance means you don't know you can't do something.
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