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Topic: 4.0L Engine Swap Question

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OtsiderCherokee
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4.0L Engine Swap Question
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I am wondering if I can put an engine that is advertised as a 1992-1996 4.0L engine into my 1989 Cherokee.

I would use my intake, exhaust and accessories, basically only using the long block.

My engine suddenly started having a lot of blow-by, to the tune of using 1 qt of oil to go 20 miles....

Thanks in advance for your assistance, this board hasn't let me down yet!



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1999 Jeep Cherokee Sport 4X4 4.0L Auto
1989 Jeep Cherokee 4X4 4.0L 5-spd (Using more oil than gas...)
LEAD_NOT_FOLLOW
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Before you go swapping motors and all (your more than welcome to if you want), why don't we try to see what the problem with your current motor is first.

Sounds like your CCV system is jacked up.

Pull the back "plug" on the valve cover and see if it's clogged. This is a VERY common problem on the Renix era XJ's...

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OtsiderCherokee
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Swapping engines is the last thing I want to do, especially when there is snow on the ground as I do not want to have to rely on my Camaro to get me around!

I know that the line is clear and there is strong vacuum coming out of the intake manifold, but I do not know about the fitting inside the valve cover though....

It just started blowing by after I took it on a 120 mile round trip the other night. When I got back to town I had a major oil leak going on and it left a huge puddle underneath. Just today I had to go to the next town which is 20 miles away and it used 1 qt going over, and 1 qt coming home...

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1999 Jeep Cherokee Sport 4X4 4.0L Auto
1989 Jeep Cherokee 4X4 4.0L 5-spd (Using more oil than gas...)
LEAD_NOT_FOLLOW
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Check that grommet 1st than report back.

Your 100% sure that the smaller hard line going into it is clear?

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'93 XJ Cherokee Sport - build thread
'89 XJ Cherokee Laredo - build thread
'88 MJ Comanche Pioneer SWB - build thread
'87 MJ Comanche LWB
'94 YJ Wrangler - build thread


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OtsiderCherokee
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Yup, the hard line is clear.  I will have a chance to look into the grommet tomorrow afternoon when I can pull it into my friend's shop.


LEAD_NOT_FOLLOW wrote:

Check that grommet 1st than report back.

Your 100% sure that the smaller hard line going into it is clear?






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1999 Jeep Cherokee Sport 4X4 4.0L Auto
1989 Jeep Cherokee 4X4 4.0L 5-spd (Using more oil than gas...)
OtsiderCherokee
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Well, it is breathing fine out of the crankcase ventilation on the back of the valve cover. I think it had some blockage in it, but after I cleaned it out, it is still blowing oil.

I took it out on the highway and flogged it and it is blowing some oil out of the tailpipe....

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1999 Jeep Cherokee Sport 4X4 4.0L Auto
1989 Jeep Cherokee 4X4 4.0L 5-spd (Using more oil than gas...)
HuNtS
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probably not something you'd feel like doing, but if i had the problem i'd pop off the valve cover, and give the insides a nice thorough cleaning... worst comes to worst, even if it doesnt help or fix anything, at least you know that's the last thing you'll have to worry about..

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1993 Green xj 4x4
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2007 Ninja 650r
1994sport
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If you need an engine hoist lemme know. I'm in indy and have a mint one i'll let go cheap.

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