AMC Eagle Den Forum

The Mighty 258 => The Engine => Topic started by: whiteandbronze4 on June 25, 2012, 11:37:59 PM

Title: rear main seal
Post by: whiteandbronze4 on June 25, 2012, 11:37:59 PM
I've let my rear main seal leak for too long and now I've finally got time to fix it. does anyone have any tips or tricks to changing it? The Chiltons manule says i only have to pick up the engine and remove the oil pan to get to it. is this true? should i drop the trans as well? or leave the oil pan and just drop the trans? Maybe leave the trans and yank the whole engine?  :help:
anyone have any pictures of when they did this to share?

Thank you
Title: Re: rear main seal
Post by: thereverendbill on June 26, 2012, 12:05:08 AM
the best plain of action I'd say is to drop the trans to get to it or pull the motor.  Some say that you can take take the oilpan off without pulling the engine but when I tried i ended up having to pull the engine after we forced the old oil pan off
Title: Re: rear main seal
Post by: milliard431 on June 28, 2012, 10:42:36 AM
I could swear there is an article on how to replace by just dropping the oil pan but just give this post a couple days and one or more members will let you know.
Title: Re: rear main seal
Post by: carnuck on June 30, 2012, 12:06:59 PM
It depends on whether you have the 4 cyl or 6 cyl.
Title: Re: rear main seal
Post by: whiteandbronze4 on June 30, 2012, 09:00:35 PM
it's a 6
Title: Re: rear main seal
Post by: carnuck on July 02, 2012, 12:20:35 AM
Then drop the oil pan and rear main cap. The lower half is easy. The upper half is tougher. When I did mine, I thought it was still leaking, but it turned out it was the valve cover all along and then the oil pressure sender blew off on the freeway!
Title: Re: rear main seal
Post by: whiteandbronze4 on July 04, 2012, 06:15:02 AM
I had just the opposite problem. I changed the Valve cover but it was the rear Main. I don't need to do anything fancy to the engine like pick it up a bit to get the pan off?
Title: Re: rear main seal
Post by: Eagleearl on July 04, 2012, 08:41:34 AM
I've never done it but the engine would need to be raised quite a bit to get the oil pan to slide below the front of the transmissionand below the crankshaft in the front.
Title: Re: rear main seal
Post by: vangremlin on July 04, 2012, 01:50:00 PM
You can go one of two ways - raise the engine, or drop the front drivetrain.  Either way you have to gain enough clearance to remove the oil pan, like Eagleearl said.
Title: Re: rear main seal
Post by: milliard431 on September 08, 2012, 08:46:21 PM
And replace the appropriate mounts while you are at it!