breather filter!!
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
replacing the factory hose that goes to the air box with that filter is a nono that hose is there to draw crank case pressure from the motor during acceleration and load conditions the small one in the rear of the valve cover is to draw crankcase pressure out at idle
CF Veteran
Joined: Aug 2010
Posts: 2,038
Likes: 4
From: DIRTY SOUTH
Year: 1991
Model: Cherokee
Engine: 4.0 ho
Senior Member
Joined: Apr 2010
Posts: 615
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From: Bonney Lake, WA
Year: 1989
Model: Cherokee
Engine: 4.0 IL6
I use one to filter the incoming air for my A/C OBA conversion. Unless you did some modification to your motor or air filter box I cannot think of any reason why you would need one.
CF Veteran
Joined: Aug 2010
Posts: 2,038
Likes: 4
From: DIRTY SOUTH
Year: 1991
Model: Cherokee
Engine: 4.0 ho
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
if crankcase pressure is not drawn out oil will be forced out by the pressure from ,dip stick tube, and any other weak areas where gaskets are used to keep oil from leaking during normal usages
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Senior Member
Joined: Nov 2009
Posts: 834
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From: Delaware county PA
Year: 1998
Model: Cherokee
Engine: 4.0L
I beleve this is what your trying to do hope the pix help.


Only change i made since i did the intake was adding a heat/mud sheald..

Eta, been running this setup for about a year with no problem.


Only change i made since i did the intake was adding a heat/mud sheald..

Eta, been running this setup for about a year with no problem.
Last edited by DELCOZRT; Jan 4, 2011 at 11:27 PM.
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