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R3 rear main leaking #1908945 09/08/15 11:29 PM 09/08/15 11:29 PM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	Looks like I'll be pulling the R3 motor out of my car the rear main is leaking. Any suggestions or tips on changing the rear main seal so it doesn't leak anymore? And which Seal should I use? Thanks

Re: R3 rear main leaking [Re: Plymouth340] #1908959 09/08/15 11:54 PM 09/08/15 11:54 PM
Joined: Dec 2006 Posts: 3,395 Pa Hot 340 master
Hot 340 master Joined: Dec 2006 Posts: 3,395 Pa	Make real sure its not your cam plug leaking. Dont ask me why I say that.

Re: R3 rear main leaking [Re: Plymouth340] #1908979 09/09/15 12:34 AM 09/09/15 12:34 AM
Joined: Jan 2003 Posts: 11,718 Portage,michigan B B3422W5 I Live Here
B3422W5 I Live Here B Joined: Jan 2003 Posts: 11,718 Portage,michigan	Or me...... Pulled pan off twice( in the car) second time even installed a rope seal..... before I had enough sense to put the car on a lift and yank the tranny.... Walla..... Oil dripping out the bottom of the cam plug..... 69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8

Re: R3 rear main leaking [Re: B3422W5] #1908994 09/09/15 12:57 AM 09/09/15 12:57 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	I had the cam plug leak on my R3.. after I put a new one in I siliconed the plug in.... I didnt have any rear main leaks but I also had the rear of the pan leak after I hit the pan coming back down

Re: R3 rear main leaking [Re: Plymouth340] #1912642 09/14/15 11:40 PM 09/14/15 11:40 PM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	got the motor out. theres oil everywhere. so how do you tell where its coming from? Doesn't look like any plugs are loose. so I guess I will put in a new rear main and hope for the best.

Re: R3 rear main leaking [Re: Plymouth340] #1912659 09/14/15 11:48 PM 09/14/15 11:48 PM
Joined: Oct 2010 Posts: 2,408 Ambridge, Pa. R rickraw top fuel
rickraw top fuel R Joined: Oct 2010 Posts: 2,408 Ambridge, Pa.	Clean the block, add a dye to the oil & prime the heck out of it.

Re: R3 rear main leaking [Re: Plymouth340] #1914697 09/17/15 09:44 PM 09/17/15 09:44 PM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	put low pressure air in motor and looks like cam plug is leaking.. installed new plug with sealer. didn't go In real tight but will check with air in 24 hours

Re: R3 rear main leaking [Re: Plymouth340] #1914799 09/18/15 01:13 AM 09/18/15 01:13 AM
Joined: Jan 2003 Posts: 11,718 Portage,michigan B B3422W5 I Live Here
B3422W5 I Live Here B Joined: Jan 2003 Posts: 11,718 Portage,michigan	Best to use a little anaerobic sealer on that plug, once you push it in it will set up nicely. Never had a leak after that. Last edited by B3422W5; 09/18/15 01:13 AM. 69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8

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