Rear main leaking

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   Hey Guys
 I know this subject has been beating with a dead stick but I need some help. The rear main on my 1948 c2ja with a motor number of J202199 is leaking  pretty good again. Seems like about every 2 years it starts leaking and I have done several things to stop the problem. The oil is dripping from between the engine plate and bell housing I have check the PVC system several times for blockage and have never found any. I had the crank turned and had new main and rod bearings and the surface for the seal cleaned up and all the surfaces looked really good before we put it back in. I have tried a lot of different seals and they all last about 2 years and then start leaking. This time it is leaking almost running out. I have about 50 pounds of oil pressure when I start it up and after it is hot the oil pressure runs about 20 pounds. We have tried a rope seal but couldn't get installed right so we put a different seal in. I use Shell Rotella 15-40 oil but don't think that should have anything to do with the leak. I order a new seal from Kaiser Willys and will try this seal. I have never used one of theirs.
   Does anyone have any other ideas???

Thanks 
Pat

Edited by Pat T. - 02 July 2015 at 1:52am

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Pat T. Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 Feb. 2006 Location: Central IL Status: Offline Points: 675	Post Options Post Reply Quote Pat T. Report Post Thanks(0) Quote Reply Topic: Rear main leaking Posted: 22 June 2015 at 11:45pm
	Hey Guys I know this subject has been beating with a dead stick but I need some help. The rear main on my 1948 c2ja with a motor number of J202199 is leaking pretty good again. Seems like about every 2 years it starts leaking and I have done several things to stop the problem. The oil is dripping from between the engine plate and bell housing I have check the PVC system several times for blockage and have never found any. I had the crank turned and had new main and rod bearings and the surface for the seal cleaned up and all the surfaces looked really good before we put it back in. I have tried a lot of different seals and they all last about 2 years and then start leaking. This time it is leaking almost running out. I have about 50 pounds of oil pressure when I start it up and after it is hot the oil pressure runs about 20 pounds. We have tried a rope seal but couldn't get installed right so we put a different seal in. I use Shell Rotella 15-40 oil but don't think that should have anything to do with the leak. I order a new seal from Kaiser Willys and will try this seal. I have never used one of theirs. Does anyone have any other ideas??? Thanks Pat Edited by Pat T. - 02 July 2015 at 1:52am

lowenuf Members Profile Send Private Message Find Members Posts Add to Buddy List Member Sponsor Member x 2 Joined: 29 Aug. 2006 Location: Ohio Status: Offline Points: 9122	Post Options Post Reply Quote lowenuf Report Post Thanks(0) Quote Reply Posted: 23 June 2015 at 12:46am
	When you re-installed the crank, was the "end-play" issue addressed? Was a "before" and "after" measurement taken? Even with the replacement of thrust washers, correct "run-out" needs to be attained. If the crankshaft has too much fore/aft movement, it will eat up a rear main seal in a short amount of time... Splash welding, and regrinding end play journal on a crankshaft is a high priority for my machinist.....
	45 #10012 45 #10033 ACM #47 45 #10163 ACM #188 57 CJ5 Dauntless V6, T-18 4-speed, D-44 rear/D-30 front, D-20 twin stick

Pat T. Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 Feb. 2006 Location: Central IL Status: Offline Points: 675	Post Options Post Reply Quote Pat T. Report Post Thanks(0) Quote Reply Posted: 23 June 2015 at 1:44am
	Lowenuf Can't really say if that was ever check before but it will before this seal is. Seams like when we had the the crank out to turn the surfaces that we looked at it but like I said don't know for sure. Thanks for the advise. Pat

dennisanvil Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 07 June 2008 Location: ia Status: Offline Points: 1645	Post Options Post Reply Quote dennisanvil Report Post Thanks(0) Quote Reply Posted: 25 June 2015 at 2:51am
	[ Edited by dennisanvil - 05 July 2015 at 1:49am
	dennisanvil 1948 cj2a, maker of tailgate hooks & hand forge iron ware there not any knowen cure for jeep fever. serial # 164136<

johnnybravo Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 Feb. 2008 Location: Glen Lyn, VA Status: Offline Points: 2075	Post Options Post Reply Quote johnnybravo Report Post Thanks(0) Quote Reply Posted: 25 June 2015 at 11:44am
	Can you post a photo of the seal you remove for future reference.
	Ret. USAR-Vet, 6-GPW's,, 1-M38 w/M-100, 1-47 WO "Jeep" 4X2 Wagon, several ruff CJ2&3A's, 1-CJ3B,

Pat T. Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 Feb. 2006 Location: Central IL Status: Offline Points: 675	Post Options Post Reply Quote Pat T. Report Post Thanks(0) Quote Reply Posted: 25 June 2015 at 12:47pm
	Yes I will and I am going to try and get some dye and put in the engine and run it and see if it will tell where to oil is coming from. I am waiting on the new seal to come. Pat

Pat T. Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 Feb. 2006 Location: Central IL Status: Offline Points: 675	Post Options Post Reply Quote Pat T. Report Post Thanks(0) Quote Reply Posted: 02 July 2015 at 2:10am
	These dowels were pull out of the main caps this way. Part of them had pushed past the oil pan even. I have more pictures but am having trouble getting them to post. I will keep trying Pat

Pat T. Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 Feb. 2006 Location: Central IL Status: Offline Points: 675	Post Options Post Reply Quote Pat T. Report Post Thanks(0) Quote Reply Posted: 02 July 2015 at 2:19am
	Here are a couple more pictures or the seal that I got to post. I have 2 more which are the best but having trouble getting them to post Pat

Pat T. Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 Feb. 2006 Location: Central IL Status: Offline Points: 675	Post Options Post Reply Quote Pat T. Report Post Thanks(0) Quote Reply Posted: 02 July 2015 at 2:31am
	Well I have one more picture to post but this is going to have to be it. I haven't had this much trouble before.

Pat T. Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 Feb. 2006 Location: Central IL Status: Offline Points: 675	Post Options Post Reply Quote Pat T. Report Post Thanks(0) Quote Reply Posted: 02 July 2015 at 2:37am
	This is how the seal came out of the engine. I have been using Shell Rotella oil and I don't think this would have caused the problem. The seals turned about half way so that the joints were up and down instead of crosswise. The plugs where pushing out past the oil pan a little. I have never seen anything like this before. I can't find where the seals came from but will keep looking. What do you guys think Pat

Ridgerunner Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 05 Aug. 2005 Location: New Jersey Status: Offline Points: 71	Post Options Post Reply Quote Ridgerunner Report Post Thanks(0) Quote Reply Posted: 03 July 2015 at 4:43pm
	Wow. I have never seen that before! That's crazy. Also, you wrote that you use a 15w 40w oil. That maybe part of the leaking problem. I bevieve that means it protects like a 40 w at the viscocty of a 15w. I think that makes it thinner oil making it easier to leak out in places. Personally I use a straight 40 w oil in older engines. My everyday runner jeep is a '42 GPW with a CJ2 block, an older rebuild, I run straight 30 w in him. That guy leaks too.
	'41 MB,1-'42 GPW,1-'44 MB,1-'46 CJ2A column Shift, 1-'48 CJ2A,1-'54 M38A1, '51 M38

Pat T. Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 Feb. 2006 Location: Central IL Status: Offline Points: 675	Post Options Post Reply Quote Pat T. Report Post Thanks(0) Quote Reply Posted: 03 July 2015 at 6:06pm
	I switched to napa 10-30 and see how that works. I can't figure out how the seal turned 90 degrees from the way it was installed