Breather inserts? (valve cover)
Thread Starter
Instructor
Joined: Nov 2002
Posts: 193
Likes: 0
From: Bloomington IN
Breather inserts? (valve cover)
What the purpose and how do you know if you should use one?? I had and insert on my old valve covers and my new chrome ones don't...
Any opinions?
Any opinions?
Drifting
Joined: Jul 2002
Posts: 1,855
Likes: 0
From: Cocoa Beach FL
Re: Breather inserts? (biltogo)
generally they're there to let the crankcase breathe, like with the PCV system.
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Breather inserts? (wayne_69_427)
On my car I have the PVC valve on the lrft side cover and a K&D breather on the right. Check my web sight for a picture.
Le Mans Master
Joined: Feb 1999
Posts: 6,807
Likes: 0
From: Hoosier
Cruise-In III Veteran
Re: Breather inserts? (Mystery Machine)
generally they're there to let the crankcase breathe, like with the PCV system.
Stupid question then...if I have a PCV valve can I just remove it and put a breather filter in there instead?
Stupid question then...if I have a PCV valve can I just remove it and put a breather filter in there instead?
Usually, you can expect the PCV system to minimze crankcase pressures helping the rings to seal and reduce some power loss. Sometimes those pressures also cause or accelerate oil leaks past gaskets. Look at many race engines. They use a vacuum pump to get the job done.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Re: Breather inserts? (biltogo)
You want some ventilation system.
Early system- There was a "breather" & a draft tube hanging down- worked when running (moving).
Positive Crankcase Ventilation uses breather & PCV valve. For emissions the breather was connected to the air filter.
Early system- There was a "breather" & a draft tube hanging down- worked when running (moving).
Positive Crankcase Ventilation uses breather & PCV valve. For emissions the breather was connected to the air filter.
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