Quick Question
Thread Starter
CF Veteran
Joined: May 2012
Posts: 3,004
Likes: 1
From: Wilmington,NC
Year: 1989
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
If that filter were to plug up on the inside, crank-case pressure might get high from blow-by. (past pistons). Then it will try to leak anywhere it can. Push up the dipstick, front and rear seals, ect. It'll run down and look like a Rear Main seal. Then it blows back on to the exhaust pipe where it crosses behind the bell housing. It might burn on that and make you look like a comet with a trail. No prob. You just cut a piece of aluminum trailer siding and wire it so the oil doesn't hit the pipe. (carry a piece or cardboard in case you want to park). (makes great fire starter once soaked). Mine vents OK. 
Thread Starter
CF Veteran
Joined: May 2012
Posts: 3,004
Likes: 1
From: Wilmington,NC
Year: 1989
Model: Cherokee
Engine: 4.0
If that filter were to plug up on the inside, crank-case pressure might get high from blow-by. (past pistons). Then it will try to leak anywhere it can. Push up the dipstick, front and rear seals, ect. It'll run down and look like a Rear Main seal. Then it blows back on to the exhaust pipe where it crosses behind the bell housing. It might burn on that and make you look like a comet with a trail. No prob. You just cut a piece of aluminum trailer siding and wire it so the oil doesn't hit the pipe. (carry a piece or cardboard in case you want to park). (makes great fire starter once soaked). Mine vents OK.
Thread Starter
CF Veteran
Joined: May 2012
Posts: 3,004
Likes: 1
From: Wilmington,NC
Year: 1989
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Dec 2012
Posts: 4,169
Likes: 6
From: York, PA
Year: 1998
Model: Cherokee
Engine: 4.0
If that filter were to plug up on the inside, crank-case pressure might get high from blow-by. (past pistons). Then it will try to leak anywhere it can. Push up the dipstick, front and rear seals, ect. It'll run down and look like a Rear Main seal. Then it blows back on to the exhaust pipe where it crosses behind the bell housing. It might burn on that and make you look like a comet with a trail. No prob. You just cut a piece of aluminum trailer siding and wire it so the oil doesn't hit the pipe. (carry a piece or cardboard in case you want to park). (makes great fire starter once soaked). Mine vents OK.
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
On that front vent? no I don't think so, unless it drips oily goo. Idk, on a new engine it might actually suck IN there. My blow-by isn't bad for 273K, but it will get worse soon enough! Next time I have my valve cover off I'll do Cruisers valve cover Mod. Unless I'm doing an autopsy.
Thread Starter
CF Veteran
Joined: May 2012
Posts: 3,004
Likes: 1
From: Wilmington,NC
Year: 1989
Model: Cherokee
Engine: 4.0
On that front vent? no I don't think so, unless it drips oily goo. Idk, on a new engine it might actually suck IN there. My blow-by isn't bad for 273K, but it will get worse soon enough! Next time I have my valve cover off I'll do Cruisers valve cover Mod. Unless I'm doing an autopsy.
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