Valve cover breathers ???

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Topic author
Fast Eddie
Posts: 53
Joined: Thu Nov 30, 2017 8:18 pm
Location: South Lyon, MI

Valve cover breathers ???

Post by Fast Eddie »

The PO of my J20 installed Edelbrock chrome valve covers w/4 breather holes. Stock 360 valve covers has no breathers! I do have PCV and air cleaner hose to intake stack hooked up. Do I really need those extra holes in the valve covers, just create more oil film on engine IMO??? THX for any insights!!
1979 J20, 360 w/NV4500/D300 Twin Stick/3.73 SOLD
1978 Cherokee Chief W/T Levi interior, 360 Q/T. SCRAPPED
1970 Gladiator J4800 Camper Special, Buick 350, 4spd. SOLD
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REDONE
Posts: 2678
Joined: Tue Sep 13, 2011 5:48 pm
Location: Lakewood and Bailey, CO

Re: Valve cover breathers ???

Post by REDONE »

Nope, you don't need them and you don't want them. The crankcase breathes through the cap on the fill tube. I've never been able to shrink myself down and hangout inside a valve cover while running the engine on the highway, but I've heard they pretty much fill up with oil at sustained high RPMs, which is why the AMC engineers didn't put breathers on the valve covers to begin with.
79 J-10 (Honcho Mucho) KE0LSU
304/Performance Fuel Injection TBI/MTA1/SP2P/Magnum rockers
T18/D20/D44s&4.10s/33" Mud Claws
Grizzly Locker Rear
4" front spring drop, 5" rear shackle flip
Chevy style HEI (ECM controlled)
Dolphin "Shark" gauges in a fancy homemade oak bezel
3/4 resto, rotting faster than I've been fixing it.

Topic author
Fast Eddie
Posts: 53
Joined: Thu Nov 30, 2017 8:18 pm
Location: South Lyon, MI

Re: Valve cover breathers ???

Post by Fast Eddie »

Thanks!! That is what I was thinking too! Yes, the Edelbrock valve covers are a nice addition, but not with all the breathers!! Much appreciated!!!
1979 J20, 360 w/NV4500/D300 Twin Stick/3.73 SOLD
1978 Cherokee Chief W/T Levi interior, 360 Q/T. SCRAPPED
1970 Gladiator J4800 Camper Special, Buick 350, 4spd. SOLD
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