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Unread 03-08-2011, 05:12 PM   #1
96xjmyjoy
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Burning Oil...

Next problem to fix... Noticed that my white garage door had black splatter on it. (I back the XJ up) So I was thinking that maybe since this jeep has no o2/cat on it that would be it. However, when I pulled the cap off the Valve cover it was smoking slightly. This engine doesn't leak anywhere at least...

So am I burning oil for sure? Only way I will be able to tell for sure is after another oil change and a Cat gets put on...

Til then, a link to a good stroker writeup please!

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Unread 03-08-2011, 05:27 PM   #2
dukie564
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both those things are normal at startup when the engine is running in open loop. It will run very rich (thus the black on the door). It's also normal for the hole for the valve cover to "smoke" with the cap off when the engine is hot, only it's not smoke it's steam.

You would be getting blue smoke behind you if it were burning oil. 4.0L's are not known for being oil burners (just leakers )
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1995 XJ Cherokee Sport
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33x12.5 Mickey Thompson Baja MTZ Tires, 283,000 mi and runnin' strong
http://www.jeepforum.com/forum/f22/project-danger-cart-xj-1297118/
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Unread 03-08-2011, 05:42 PM   #3
tjwalker
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[QUOTE=96xjmyjoy;11119886]So am I burning oil for sure? /QUOTE]

Are you using "measurable" oil as shown on the dipstick?? And if so, how much?

That will tell the story if you are burning oil.
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Unread 03-08-2011, 06:59 PM   #4
96xjmyjoy
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Will wait and see. Just got an oil change so I will monitor all my symptoms.
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Unread 03-09-2011, 04:33 PM   #5
96xjmyjoy
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In another thread I think I have decided to check my MAT sensor along with replacing the o2 sensor before I diagnose it as burning oil. Will monitor it all though.
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Unread 03-09-2011, 06:16 PM   #6
dukie564
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you don't have a MAT. You have a MAP though...
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1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 283,000 mi and runnin' strong
http://www.jeepforum.com/forum/f22/project-danger-cart-xj-1297118/
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Unread 03-09-2011, 08:31 PM   #7
96xjmyjoy
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And is the MAP located at the front of the manifold?
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Unread 03-09-2011, 08:56 PM   #8
dukie564
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no it's above the back of the valve cover. Has a wiring harness and vacuum tubing running to it.
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1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 283,000 mi and runnin' strong
http://www.jeepforum.com/forum/f22/project-danger-cart-xj-1297118/
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Unread 03-10-2011, 12:39 AM   #9
96xjmyjoy
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Dukie-
If you look here http://www.jeepforum.com/forum/f11/e...es-go-1178627/
This is what I am trying to figure out. Will try to figure this out before I pursue thew burning oil issue if ,in fact, that is what it is.
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Unread 03-10-2011, 08:03 AM   #10
dukie564
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hmmm to your knowledge did it have an engine swap at some point? this is a 96 xj right?
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1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 283,000 mi and runnin' strong
http://www.jeepforum.com/forum/f22/project-danger-cart-xj-1297118/
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Unread 03-10-2011, 01:27 PM   #11
96xjmyjoy
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This has been discussed with a mechanic I go to and my uncle who is a gearhead. Yes it is a 96 classic. Should have the HO
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Unread 03-10-2011, 01:33 PM   #12
dukie564
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well then you don't need a MAT sensor, that was only used on early RENIX XJs. You can leave it disconnected.

Why someone would swap a renix intake onto your 96HO i don't know, but someone definitely has. They bolt up fine, but the ports are very mismatched. I'm sure your performance is suffering.
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1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 283,000 mi and runnin' strong
http://www.jeepforum.com/forum/f22/project-danger-cart-xj-1297118/
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Unread 03-11-2011, 02:23 AM   #13
96xjmyjoy
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That would explain the "exhaust leak" then. I guess I will just get a newamifold and headers while I'm at it. Good to know this is a possibility. Will post up my final solution. How would I tell if the motor is the orig? HO stamped somewhere on it?
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Unread 03-11-2011, 05:44 AM   #14
cruiser54
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Quote:
Originally Posted by dukie564 View Post
well then you don't need a MAT sensor, that was only used on early RENIX XJs. You can leave it disconnected.

Why someone would swap a renix intake onto your 96HO i don't know, but someone definitely has. They bolt up fine, but the ports are very mismatched. I'm sure your performance is suffering.
Dukie-The ports aren't that badly mis-matched. 1/4" max at the bottom of the port.

I did port match mine but I didn't have to.
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