Visible Oil Leak near rear of engine - JeepForum.com
 
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post #1 of 5 Old 01-30-2014, 10:08 AM Thread Starter
libertyflyer
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2004 KJ Liberty 
 
Join Date: Jan 2014
Location: dover
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Visible Oil Leak near rear of engine

Hi everyone. I'm having trouble finding an oil leak.

Been driving this jeep since 20k miles and haven't had any oil issues. Im now at 108k and there is a visible leak.

We recently moved to NH and I've been using the 4WD quite a bit because of the snow. I noticed a burning oil smell and recently saw some smoke coming from the engine near the rear.

Upon further investigation, I saw oil dripping down from the left side of the engine (if you are facing the Jeep). It's dripping from the rear somewhere and it falls directly onto the exhaust right before it meets the Cat Converter. I can't seem to see where exactly its coming from.

Any ideas?

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post #2 of 5 Old 01-30-2014, 11:12 AM
Bnova
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Join Date: Nov 2013
Location: Minneota
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I just saw a post here recently that the valve covers can leak at the rear end of the cover and drip right down onto the exhaust and not be seen probably without a mirror and flashlight.
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post #3 of 5 Old 01-31-2014, 06:41 AM
TwoBobsKJ
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Quote:
Originally Posted by libertyflyer View Post
Hi everyone. I'm having trouble finding an oil leak.

Been driving this jeep since 20k miles and haven't had any oil issues. Im now at 108k and there is a visible leak.

We recently moved to NH and I've been using the 4WD quite a bit because of the snow. I noticed a burning oil smell and recently saw some smoke coming from the engine near the rear.

Upon further investigation, I saw oil dripping down from the left side of the engine (if you are facing the Jeep). It's dripping from the rear somewhere and it falls directly onto the exhaust right before it meets the Cat Converter. I can't seem to see where exactly its coming from.

Any ideas?
The valve cover gasket is known to leak at the rear closest to the firewall. Oil seeps out from under the gasket, forms a drop on the cylinder head, and then falls down to the exhaust manifold and/or the catalytic converter. When the oil is burnt it rises up and is sucked into the HVAC cold air intake at the cowl - makes for a glorious smell in the passenger cabin

The gasket replacement isn't that difficult - but on the passenger side it's a bit more challenging due to the heater core lines that must be removed from the firewall and the coolant reservoir must be moved out of the way. Neither of those two tasks is difficult - just a couple more things to do vs the driver's side.

When you install the new gaskets be sure to use the new grommets that come with the gasket set - pop the old grommets out of the valve covers and press in the new grommets.

Bob

2003 Renegade, Black
- 3.7L, 42RLE, 4.10's, 4X Guard Trans skid, Factory Engine, T-case, Tank skids, Custom BoulderBars, OME 927/948, Bilsteins, JBA A-Arms & 1/4" top plate, 1 extra rear iso/side, Moabs with Goodyear Duratracs 265/70-16
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post #4 of 5 Old 01-31-2014, 01:50 PM
USPLiberty
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Join Date: Feb 2002
Location: CA
Posts: 126
You can check the valve cover for leaks, and there is plastic "something" on the lower passenger side just below the valve cover that can also leak. Having an inspection camera helps a lot, you can't see very far into these tight modern engine compartments.
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post #5 of 5 Old 01-31-2014, 02:28 PM
tommudd
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Join Date: Aug 2008
Location: Central OH/ Kilimanjaro,Tanzania
Posts: 5,535
98% sure its the valve cover, easy fix
Took me longer to grab tools than to fix it almost

04 KJ 4.5 JBA lift, 03 KJ 2.5 JBA coilovers,
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