martyinco

This is my first Jeep, so also Ny first 4.0 engine

I've already changed the valve cover gasket. But am still getting a decent size spot over night. Plan this weekend is to get it up on stands and clean the undercarriage and hopefully see if I can identify the source.

Where are some good places to start looking? Do rear mains go out often? Stuff like that?

Thanks in advance!

pikapp504

Valve cover gasket, oil pan gasket, rear main seal, and the oil filter adapter. Those are about the 4 main areas you'll get an oil leak. Start from the top and work your way down.

TrekkerJmm

Hi and welcome to the "Jeep" sickness...lol
OK lets start with the O-rings on the oil filter adapter then move t the rear main seal and oil pan...all most common oil leaks on 4.0's but they last for a LONG LONG time if taken care of...Tj

threeriversbound

Take at peak at the distributor gasket too. The PO on mine left the hold down clamp off which kept the distributor from being helpd down properly which leads to a pretty good leak.

Brando26

ive got a leak at the front of the oil pan, cant tell if its coming from the oil pan or the crank. is it possible to come from the crank?

martyinco

Thanks for all the replies, going to go ahead with the major clean up hopefully this weekend and start tracing the dreaded "drip"