Finned Valve Covers With No Vent Hole????

I recently ordered some finned valve covers from JEGS for my 302 engine and didn't notice until I received them that there was no vent hole. I thought maybe I would just return them and order some from Mooneyes. The specific valve covers for the 302 that Mooneyes offers also have no vent hole. Can anyone enlighten me as to why this is missing on the valve covers for the 302?

THANKS!

 

A drill can be your friend.

A-C but not D



The 1st 3 are Moon. Remove the top & foam insert to add oil.

 

I have a set of Moons on the Merc they work great. Unscrew the top of teh breather to add oil. Nuttin to it.



-Abone.

PS. I was kind of suprised, they were only like 38 bucks each...

 

Cathy, don't worry, it's not just valve covers for a 302 that don't have vent covers, they make no vent covers for all makes and models. The stock vette finned valve covers for my L79, 327 don't have them either, but I did two things. #1 use a oil filler cap that has a vent breather (yes I have an oil fill tube that goes down through my intake), and #2 did exactly what my brother above suggested using style c mounted on the carb side of the valve cover, or add the to your valve covers on the outside, either way they work great and look different that the car parked on either side of you. Look at this picture in my photo album and you'll see what I mean. http://www.jalopyjournal.com/forum/album.php?albumid=983&pictureid=80616

 

To answer your original question. Early Small block chevy engines
(283/327) had a down draft tube, which ventilated spent fumes out the back of the motor via a port just behind the distributor hole. A downdraft tube plugged into the port and carried the spent crankcase g***es down and under the car between the motor and trans. It served the same purpose as breathers on the valve covers, and is one of the few distinguishing characteristics of the late fifties, early sixties small block chevrolets.

 

Unless. of course, you're talking about the Ford 302. In that case....nevermind...

 

Actually until the PCV valve came about, they all had a downdraft tube somewhere on them, probably the earliest small block Fords too.

 

Speedway sells the finned ones with the holes already in em.