Click here to search for Mopar cars and parts for sale.


Moparchat - Home of MOPAR enthusiasts worldwide!  

Go Back   Moparchat - Home of MOPAR enthusiasts worldwide! > Technical Forums > Performance Talk
Register FAQ Members List Calendar Mark Forums Read


Welcome to the Moparchat - Home of MOPAR enthusiasts worldwide! forums.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.
Reply
 
Thread Tools Display Modes
  #1  
Old 06-10-2000, 07:32 PM
origcharger origcharger is offline
Registered User
 
Join Date: Feb 2000
Location: Iowa
Posts: 91
Question

Someone told me that the knurling on the crankshaft where the rear seal rides will not work with the rubber seals. He said you have to use a rope seal or machine the knurling off of the crank. I have never heard of this being a problem. I have never heard of any one removing the knurling and doubt that many people use the rope seal. As you can probably surmise I have a leak on my newly assembled 383 and am second guessing myself. Does anyone have any input on this topic? I am not sure if my leak is from the side seals or the main seal. I just slipped in the rubber seal, slightly offset, dipped the side seals in diesel fuel and slid them home. Comments??????
Reply With Quote
  #2  
Old 06-10-2000, 09:47 PM
Larry Larry is offline
Registered User
 
Join Date: Dec 1999
Location: Alexandria, VA
Posts: 104
Post

I just recently freshened up my 71 383 and have the same problem. Used good quality Felpro gaskets, I followed the directions and still ended up with a leak at rear main. It is not to bad but sure makes a mess on concrete and the undercarriage of the car. If anyone has any ideas I'm all ears. Larry

---------------------
71 Charger 383
Reply With Quote
  #3  
Old 06-10-2000, 10:26 PM
Belvedere65 Belvedere65 is offline
Registered User
 
Join Date: Nov 1999
Location: Milford, N.H. U.S.A.
Age: 73
Posts: 155
Post

Lightly oil the rubber rear main seal. Make sure the lip is towards the inside. Forget soaking the side seals in this or that! Use a gasket maker sealant on the seal housing & the sides of the block that the seal touches, install carefully. Have never had a problem doing it this way.

------------------
BFRACN
Reply With Quote
  #4  
Old 06-11-2000, 03:57 AM
Glen440's Avatar
Glen440 Glen440 is offline
Registered User
 
Join Date: Jan 2000
Location: Richmond Hill, Ontario, Canada
Age: 36
Posts: 633
Post

Belvedere is right on. I just broke in my 440 today. Rear main sealed. I put oil on the seal and only put gasket maker on the sides. My only leak is from a header bolt.
Reply With Quote
  #5  
Old 06-11-2000, 11:41 PM
Larry Larry is offline
Registered User
 
Join Date: Dec 1999
Location: Alexandria, VA
Posts: 104
Post

When I put in the rear seal it was in a motor with about 90,000 miles and was previously leaking. I did a valve job on the heads,new oil pump etc. When I replaced the oil seal I put some light grease on the lip of the seal and double checked it was in correctly. I soaked the side seals in mineral spirits and also used gasket maker just to be on the safe side. When I first got the engine running it was not leaking. I did not notice a leak until I added and extra qt. of oil due to having the wrong dipstick installed. It has leaked a little bit ever since. The motor has some blowby but runs great. Even with the leak I only add a qt of oil every 1000 miles or so. It is just embarrasing to park in someones driveway and leave your mark. Help ? Thanks. Larry.

--------------------
71 Charger 383
Reply With Quote
  #6  
Old 06-12-2000, 12:51 AM
Gary Gary is offline
Registered User
 
Join Date: Aug 1999
Location: Argyle, TX, USA
Posts: 506
Post

I've had the same problems, but the last couple of big blocks I rebuilt, I put a thin coat of blue silicone sealer between the seal halves and the block/seal retainer. Neither has leaked one drop, so it's a coincidence or previous leakage was not between the seal and the crank, but between the seal and the seats.
Reply With Quote
  #7  
Old 06-12-2000, 02:16 PM
bsbn bsbn is offline
Registered User
 
Join Date: Sep 1999
Location: clearwater,minnesota,usa
Posts: 91
Post

last summer I replaced the rope rear main seal in a 400. i couldnt find a rope seal so i used a rubber seal with a small dab of silicon on the ends, the crankshaft was knurled. the side seals are suppposed to be soaked in mineral spirits to make them swell and seal, but silicon sealer works too. when I was done it still leaked. so I bought a couple cans of oil stop leak and after a couple months of driving it no longer leaks, and my garage floor doesnt have a pile of floor dry where the car parks.
Reply With Quote
  #8  
Old 06-18-2000, 04:06 AM
Larry Larry is offline
Registered User
 
Join Date: Dec 1999
Location: Alexandria, VA
Posts: 104
Post

Thanks for the ideas. I had already tried some stop leak to see if that would help and it seams to be working. Still do not understand what went wrong but...... Thanks again. Larry

----------------
71 Charger 383
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


Want to contribute to Moparchat?  Click below!




120x60_green

rollback0306_120X90.gif




New 2006



468 x 60 with phones
2GB Totally Free Online Backup!  Compliments of Mozy!


All times are GMT -4. The time now is 04:58 PM.


Powered by vBulletin® Version 3.6.3
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

www.pchelp.com

Forums Directory