Valve cover question
Thread Starter
Senior Member
Joined: Oct 2005
Posts: 874
Likes: 0
From: Waldorf, MD
Car: 91 Formula, 89 IROC
Engine: LB9, LB9
Transmission: 700R4, 700R4
Axle/Gears: Posi 2.73, Posi 2.73
Valve cover question
How small is the hole in the valve cover where the oil breather goes? I have gone through 2 different sizes and cannot find one that will fit. Where can I get one that will fit? Thanks guys, I kinda need it cause I messed up the stock rubber groumet that holds the stock one in.
Supreme Member
Joined: Feb 2004
Posts: 1,231
Likes: 1
From: Greenville, SC
Car: 1991 Chevy Camaro
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.42
The oil breather? Are you referring to the PCV valve on the driver's side valve cover or the crankcase breather on the passenger side valve cover? Either way, the hole in the valve cover is 1". The hole in the grommet itself for the PCV valve or breather is 3/4".
Thread Starter
Senior Member
Joined: Oct 2005
Posts: 874
Likes: 0
From: Waldorf, MD
Car: 91 Formula, 89 IROC
Engine: LB9, LB9
Transmission: 700R4, 700R4
Axle/Gears: Posi 2.73, Posi 2.73
Thanks guys, I was talking about the crankcase breather. Now where in the hell can you find a 1" breather lol?
Member
Joined: Jun 2002
Posts: 491
Likes: 1
From: Hockessin, Delaware
Car: Red 91 RS Camaro
Engine: LO3 with Comp Cam
Transmission: 700R4
Axle/Gears: 4th gen rear
KN make a 3/4 inch breather that is 4 inches in diameter. Using the same grommet as the stock tube you can push the KN one in just fine.
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