Crankcase Breathers

jlhall_10

New Member

Sep 12, 2003

95

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St Mary's, MD

Dec 15, 2003

#1

• Dec 15, 2003

• #1

what are these used for? they look like airfilters but sit on top of the valve covers.

K&N Crankcase Filters

 

Psychdaddy

Founding Member

Jun 14, 2002

304

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Derby, KS

Dec 15, 2003

#2

• Dec 15, 2003

• #2

jlhall_10 said:

what are these used for? they look like airfilters but sit on top of the valve covers.

K&N Crankcase Filters

Click to expand...

These are to help evacuate extra pressure (i.e. crankcase) build-up; especially in supercharged applications.

 

jlhall_10

New Member

Sep 12, 2003

95

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0

St Mary's, MD

Dec 15, 2003

#3

• Dec 15, 2003

• #3

Psychdaddy said:

These are to help evacuate extra pressure (i.e. crankcase) build-up; especially in supercharged applications.

Click to expand...

ok so they are not really needed in N/A applications?

EDIT: nevermind i found my answer at the bottom of the page!

 

Michael Yount

Mustang Master

Apr 10, 2002

9,039

6

79

Charlotte, NC

Dec 15, 2003

#4

• Dec 15, 2003

• #4

With a boosted application, unless the pcv system is altered, manifold boost can pressurize the crankcase -- a big no-no. The easy way around that is to be sure the pcv system has a check valve capable of keeping manifold boost out of the crankcase, and then venting the crankcase with breathers so the pressure there can escape. On a normally aspirated car, all that is handled by a properly operating pcv system.

 

mr.nitrous

New Member

Dec 13, 2003

54

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Southern California

Dec 15, 2003

#5

• Dec 15, 2003

• #5

Remove Crankcase pressure