2.5l Question
#1
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Year: 1999
Model: Cherokee
Engine: 4.0
Long story short. Bought a 86 2.5l 4 speed. It's a Comanche. Was told it would crank but not fire. So I replaced the CPS. Changed the firing order. It ran. But has massive oil coming into the airbox. I pulled the valve cover. Cleaned the cover inside and out. As well as the 2 bushings up top. Plan on redoing the entire pcv/ccv (whichever this has) and wondering why it looks like no oil has been getting up top to the valves?
Last edited by Outlaw Star; 03-04-2015 at 07:20 PM.
#2
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Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Take the pushrods out and make sure they are clean inside. Also inspect the lifters because they "pump" oil through the pushrods. Also have you checked the oil pressure?
#3
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Year: 1998
Model: Cherokee
Engine: 4.0
Check oil, and pressure, you can start it without the valve cover and check to see if oil is sraying out of the pushrods/rocker arm holes, could just look like that from sitting, most of the oil sprays onto the top of the valve cover than drips down.
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Year: 1999
Model: Cherokee
Engine: 4.0
I haven't really tested much. It's in a portable garage. And the oil that comes out. Hits the inner fender then drops on the exhaust so makes a giant smoke house.
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Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Seeing as we have Chevy style rocker arms, I can suggest a tool/clip that allows you to run without a valve cover to inspect the valvetrain. But then again by "shooting out" are we talking small spritz or actual gushing out? Because if its gushing out, we got a problem.
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Year: 1999
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Seeing as we have Chevy style rocker arms, I can suggest a tool/clip that allows you to run without a valve cover to inspect the valvetrain. But then again by "shooting out" are we talking small spritz or actual gushing out? Because if its gushing out, we got a problem.
#7
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Year: 1998
Model: Cherokee
Engine: 4.0
If its "flowing" out of the air box you have a problem. You need to find out exatly were its coming from, (probly one of the ccv hoses) remove the airbox and hoses and start it, its hard to believe that much oil would be coming from the intake...
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#11
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Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Ok, that's way to excessive on the blow by. Let's start with a few basics. 1) check routing and proper hookup of all CCV/vacuum hoses. 2) Check oil pressure 3) do a compression check.
Seems like excessive crankcase pressure and/or blowby is forcing oil up into the intake.
Seems like excessive crankcase pressure and/or blowby is forcing oil up into the intake.
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Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Obviously the PCV system is not functional. That large hose is an air INTAKE. The PCV (rear hose) should be sucking the vapors out of the valve cover. If that line or valve is clogged, or improperly hooked up, oil will come out of the front one due to excessive crankcase pressure.
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