Questions about the rear main on my 318 - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by Lonesome7.3, this thread has received 4 replies and been viewed 772 times.

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 04-07-2013, 01:22 PM Thread Starter
Senior Member
 
Lonesome7.3's Avatar
 
Join Date: Dec 2008
Location: Columbus, GA
Posts: 2,816
Points: 83,976
Thanks: 37
Thanked 44 Times in 35 Posts
Send a message via Yahoo to Lonesome7.3
Questions about the rear main on my 318

I pulled the 727 in my 72 D200 to rebuild it. When I did I found the rear main has been leaking for a while. That is the only leak I can find on that truck. While the tranny is out I figured I may as well do the rear main. The hang up is I have never been inside a 318 and I do not know what is required to get it done. I am using a friendís lift at his shop so I cannot take a much of stuff off that is not necessary I have to get it done quickly. Have any of you done this repair? If so can I get some guidance before I dig into it? What all has to come off? What kind of seal is it? Is it a two piece? DO I have to pull the rotating assembly to get to the seal?
Lonesome7.3 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 04-07-2013, 01:53 PM
Aimless Wanderer
 
Join Date: Jul 2011
Posts: 929
Points: 50,622
Thanks: 29
Thanked 359 Times in 285 Posts
Quote:
Originally Posted by Lonesome7.3 View Post
I pulled the 727 in my 72 D200 to rebuild it. When I did I found the rear main has been leaking for a while. That is the only leak I can find on that truck. While the tranny is out I figured I may as well do the rear main. The hang up is I have never been inside a 318 and I do not know what is required to get it done. I am using a friendís lift at his shop so I cannot take a much of stuff off that is not necessary I have to get it done quickly. Have any of you done this repair? If so can I get some guidance before I dig into it? What all has to come off? What kind of seal is it? Is it a two piece? DO I have to pull the rotating assembly to get to the seal?
It could be either the two piece "rope" seal or the one piece neoprene. Easy job to do. Drop the pan, remove the rear main bearing cap, check the oil pump pickup tube for integrity and install the new parts. I doubt you will be able to get the old rope style seal any longer but the two piece neoprene just "rolls in" with a gentle push and will ride around in the seal bore.

I have a few bolts I've cut the heads off of to use as guide pins to align everything when reassembling. Typically the oil pan gasket will be folded up into a box, (not always) and these alignment studs really help hold it in place until the pan is pulled up snug.

I like to use a small bead of silicone on the oil pan side of the gasket as the stamped steel pan sealing edge can be distorted from tightening the retaining bolts. I never use silicone on the cylinder block with the exception of the ends of the multi piece gaskets to ensure they do not leak at their joints. A small dab of sealant on the ends of the edges of the rear main seal where they butt up against one another is not a bad idea either. A small dab here as it will spread when you tighten the rear main cap and you don't want this stuff getting into the oil and sucked up by the pump.
Backslap is offline  
post #3 of 5 (permalink) Old 04-07-2013, 01:58 PM Thread Starter
Senior Member
Threadstarter
 
Lonesome7.3's Avatar
 
Join Date: Dec 2008
Location: Columbus, GA
Posts: 2,816
Points: 83,976
Thanks: 37
Thanked 44 Times in 35 Posts
Send a message via Yahoo to Lonesome7.3
Sounds like you have doen this a time or two. Sounds simple enough, but how to I check the oil pump tube?
Lonesome7.3 is offline  
post #4 of 5 (permalink) Old 04-07-2013, 02:14 PM
Aimless Wanderer
 
Join Date: Jul 2011
Posts: 929
Points: 50,622
Thanks: 29
Thanked 359 Times in 285 Posts
Quote:
Originally Posted by Lonesome7.3 View Post
Sounds like you have doen this a time or two. Sounds simple enough, but how to I check the oil pump tube?
It will be a round, stamped piece of tin with a screen in it. Just ensure it is tight to the tube itself. If it can be rotated, replace it, or braze it up solid at it's joint.
Backslap is offline  
post #5 of 5 (permalink) Old 04-07-2013, 02:15 PM Thread Starter
Senior Member
Threadstarter
 
Lonesome7.3's Avatar
 
Join Date: Dec 2008
Location: Columbus, GA
Posts: 2,816
Points: 83,976
Thanks: 37
Thanked 44 Times in 35 Posts
Send a message via Yahoo to Lonesome7.3
Ah, I see what you are saying.
Lonesome7.3 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Rear main seal Spanky636569 7.3L and 6.9 IDI (Pre 1994) 19 04-21-2013 01:43 PM
Rear main seal? ehopp88ss 5.9L Cummins (2003-2007.5) 2 04-01-2010 04:38 AM
Rear Main Seal broth 2008-2010 6.4L Power Stroke 13 11-05-2009 12:52 AM
rear main seal GilroyRacing 1994-2003 7.3L Power Stroke 9 02-08-2008 01:58 PM
Rear main ?'s kainers 1994-2003 7.3L Power Stroke 1 11-18-2006 08:37 PM

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome