Rear Main Seal Ends And Pan Gasket Fitment

[DJ194950]

My low mileage rebuilt engine leaks at the replaced pan gasket (leaked since the rebuild).

 

Since I installed this engine about a year ago i've since followed this forum and found out per Don C.'s

post to NOT trim the overwide gaskets for the front and back- my mistake #1.

 

Now  planning on replacing  the pan gasket and also noticed that the rear main side seals for the rear main also are sticking out on the pan gasket surface about 1/8" plus per side right at the 90 degree junction -maincap/engine pan surface. Q.,  was this mistake #2 and should have been trimmed off cleanly?? Seem

s to me that the cork gasket would not be able to fit into 90 bend and wrap over the 1/2 round end of the seals also.?

 

Don, since you said you only use a sealer on one side the the surfaces, can I assume that was with the gasket to pan with only a small amout of silicone sealer at the 90 bends on the top side for the main caps??

 

Thanks,

I did some searching (about 1 hr.) on the seals but decided to try to not spend several days to find out this one detail on the search.

 

Best to ya,

 

Doug

 

 

[DJ194950]

Forgot to add - P 23 motor in car. Come on guys someone must have some clues.    I'd like to attemp to get this car drivable soon. Don't need to repeat past mistakes!

 

Car was  almost  sold but price was not right. May or may not sell in the future but still have the 50 Suburban to get back to and a new project 50 2 dr.project  with a friend.  . I do love the Plymouths, just  can't have them all  on my disability income.

 

Thoughts are appreciated!

 

Best to ya,

 

Doug

Edited August 16, 2013 by DJ194950

[greg g]

Which type of seal does your car take??  The older ones use a graphite rope style but some where along the way they switched to one that is now replaced with neoprene.  the newer ones also take two seperate little rubber gaskets that fit into the top of the retainer cap.  The maual sayt to lubricat them with a woater and soap solution to allow them to fully compress into their respective slots.

[DJ194950]

The new syle neoprene and had two differant shapes of rubber side seals.in the seal kit from EGGE. Afeter comparing them to the slots of the block/rear main seal cap it sealed obvious that one was mutch better match that the other and that's what I installed.

Did I not get them fully set into the cap? Both had/have a protrusion on them that stuck out into the cap/ pan gasket area. Anyway to tell short of removing the cap and spending for another set of rear main seals?

Take a chance and cut off the ends protruding from the caps into the pan gasket area? I did use a silicone (black) on the edges of the side seals.

 

Ideas appreaciated!

 

Doug

[Andydodge]

Doug, I know its a pain but it sounds like its just the short pan gaskets.......the two type of "ear" seals that fit into the main cap I think are fairly straightforward, at least that was the situation on my p11.......the PO hadn't bothered to even install either ear set......oil was positively pissing out..........lol........I'd give the pan seals another go and while there clean up everything and maybe give a small squirt of silicon around the edges, etc.............andyd

[DJ194950]

Ok it's time to quit thinking about this an get on with it! 

I'm going to cut off the extra rubber sticking out from  the rear main side seals, glue the other pan gaskets to the pan, put some black silicone sealer at that joint and Lightly grease the top side of the gaskets.

 

Well givin' it a try, suppose it can only get better? 

 

Wish me good mopar luck!

 

Doug

[Don Coatney]

I did trim the rear main rubbers as pictured on my engine and I did not use anything but grease on the end cork strips on the oil pan. I have a slight weep but no major leaks.

 

On the engine I assisted in assembling last week the owner elected to not trim the rubber and he put a dab of RTV on the strip jionts as you plan to do. He has not yet added oil nor ran his engine.

 

[DJ194950]

Well,  for sure I will never use a nice heavy dose of black silicone on both sides of the pan gaskets!

Took hours and a knife like edged that could be hammered on at the block side to Finally get a gap that I could hammer a 90 degree pry bar into the small gap and Finally get the pan to start loosening up. Way to much work and tottaly destroyed the gaskets! Not cheap these days.

Everything is cleaned up again after being apart for almost 3 wks.. Try to get my late night butt up early tomorrow before it's 95+ degrees out to get er' done!

 

Doug

[ptwothree]

Doug.....I used Permatex #1. Just a dab of it every few inches and all 4 corners. I have had no leaks.  #1 dries hard and is easier to scrape off then sillykon.

[DJ194950]

Doug.....I used Permatex #1. Just a dab of it every few inches and all 4 corners. I have had no leaks.  #1 dries hard and is easier to scrape off then sillykon.

 

Q.

Is that in the tube (aviation), somewhat a paste or what, not totally sure about what the #. is.

I tend to use the Super 500, in the can with a brush, it's a mess with me on the brush end and gets Very sticky over time  I see Don C. likes the permatex pipe dope which I do like, But it is very thick to start with and quickly hardens more in the container. I have only seen the Extra large at the home depots etc. I did have that once and wasted 90% of it. Got too hard and could not get the brush out. period. But does do an excellant job when fresh!

 

 

Thought I'd add that I would use Permatex non-silicones sealers as a first choice. I'll never use red hi-temp silicone sealers Ever again. Did that on this motor and EVERY place used leaked and needed to be redone.

 

Resealed with permatex sealers, no more leaks.

 

Thanks for the reminder!!

 

 

 

 

 

Tommorow.

 

Doug

Edited August 17, 2013 by DJ194950

[ptwothree]

Q.

Is that in the tube (aviation), somewhat a paste or what, not totally sure about what the #. is.

 

 

 

It's the aviation labeled  stuff that comes in a tube.  Numbered 1, 2, and 3.  Number 1 dries hard but you have plenty of time before it sets up.  Number 3 never sets.  Napa, Oreillys etc. carry it.  I'm not a big fan of silicon sealers although they do have their place.