Originally Posted by libertyflyer
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.
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.
2003 Renegade, Black
- 3.7L, 42RLE, 4.10's, 4X Guard Trans skid, Factory Engine, T-case, Tank skids, Modded BoulderBars sliders, OME 927/948, Bilsteins, JBA A-Arms & 1/4" top plate, 1 extra rear iso/side, Moabs with Firestone Destination AT's 255/70-16