Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: Mudhawg on September 28, 2009, 01:25:00 AM

Title: 4.0L Rear Main Seal?
Post by: Mudhawg on September 28, 2009, 01:25:00 AM

How hard is it to do? guessing the motor has to come out? mine blew up on the way to maclean saturday and leaked oil all over my exhaust causing alot of smoke/embarasment

Title: Re: 4.0L Rear Main Seal?
Post by: hps4evr on September 28, 2009, 05:49:07 PM

all you do is remove the ngine oil pan. drain oil first of course. remove the rear main bearing cap. its a two piece seal so you pull the one half from the bearing cap. and push the other half out around the crank. clean everything up, do not damage the main bearings at any point. and reverse the install. add oil and a new filter, done.
oh, its that easy on a wrangler with a stick. life is more difficult when its a grand with an auto.

Title: Re: 4.0L Rear Main Seal?
Post by: cLAY on September 28, 2009, 08:32:36 PM

Also check the adapter housing, its got o-rings in it that can leak pretty good.

And check the dipstick, got a CJ in once for a rear main seal, turned out the motor was shot and blowing oil/exhaust out the dipstick tube. The way it ran down it looked like the rear main let go. I've never heard or a rear main suddenly blowing out. Usually they just start leaking and then progressivly get worse.