What is the purpose for the crankcase breather?
Thread Starter
Member
Joined: Apr 2001
Posts: 162
Likes: 0
From: Elgin, IL
What is the purpose for the crankcase breather?
I just recently put on the open breater (best 30 bucks i've ever spent) and i havent put on an after market crankcase breather...my question is what is the purpose of this part? Is it majorly important or is it just something thats there and should really not be given a second glance. I still plan on getting an aftermarket one, but i wanna know if i need to get one soon or later..thanx
------------------
1991 Camaro RS (Red)
-TTops
-Custom quad exhaust
-Edelbrock 14x3 open air element
------------------
1991 Camaro RS (Red)
-TTops
-Custom quad exhaust
-Edelbrock 14x3 open air element
Senior Member
Joined: Dec 2000
Posts: 886
Likes: 0
From: Raleigh, NC, USA
The crankcase breather can be mostly forgotten about... The pcv should be replaced semi-regularly though.
Check the breather filter. If it's black, dirty, oil stained, etc., go ahead and replace it with a new one. It's only a few bucks. And while you're at it, you might as well get an aftermarket one.
------------------
89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else
Check the breather filter. If it's black, dirty, oil stained, etc., go ahead and replace it with a new one. It's only a few bucks. And while you're at it, you might as well get an aftermarket one.
------------------
89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else
TGO Supporter
iTrader: (2)
Joined: Jul 1999
Posts: 13,579
Likes: 9
From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
I pitched my PCV valve in favor of a second breather.
To answer your question, it's function is to remove the positive pressure that can build up in your crankcase as a result of blowby. Without it, you'd have positive pressure in the crank case, which can cause all sorts of leaks in valve cover gaskets, oil pan gaskets, etc.
------------------
The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah
To answer your question, it's function is to remove the positive pressure that can build up in your crankcase as a result of blowby. Without it, you'd have positive pressure in the crank case, which can cause all sorts of leaks in valve cover gaskets, oil pan gaskets, etc.
------------------
The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah
Thread
Thread Starter
Forum
Replies
Last Post
Pac J
Tech / General Engine
3
May 17, 2020 10:44 AM
