Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1948 - 1956 F1, F100 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 07-02-2014, 02:20 AM
smallello's Avatar
smallello smallello is offline
Elder User
 
Join Date: Mar 2006
Location: NW Valley AZ
Posts: 599
smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.
Help find the leak

I need some help identifying the oil leak in my motor. It is a 1970 429 motor out of an LTD. I have an oil leak at the back of the motor that I thought may be a rear main seal.

I removed the oil pan and it seems like it is the pan gasket from what I can tell. I see no oil at the flex plate only at the pan gasket. (I'm assuming there would be oil on the flex plate if the seal was leaking)

Is there a way to determine which it is, the seal or the gasket?

Rear gasket:
Name:  DSC01293b.jpg
Views: 223
Size:  186.6 KB

No oil on the flex plate or in the bottom of the housing:
Name:  DSC01287b.jpg
Views: 213
Size:  159.6 KB
Reply With Quote
  #2  
Old 07-02-2014, 04:31 AM
truckeemtnfords truckeemtnfords is offline
Posting Guru
 
Join Date: Nov 2006
Location: Truckee, CA
Posts: 1,622
truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.
Look at the pan seal, it obviously looks like wrong. I would say that is your problem.
__________________
Dave
2002 F-250 XLT 4x4 7.3 Auto CC LB
1955 F-100 302 T-5 9"
Reply With Quote
  #3  
Old 07-02-2014, 11:49 AM
52 Merc's Avatar
52 Merc 52 Merc is online now
Post Fiend
 
Join Date: Oct 2009
Location: Kennewick, WA
Posts: 5,736
52 Merc is a name known to all52 Merc is a name known to all52 Merc is a name known to all52 Merc is a name known to all52 Merc is a name known to all52 Merc is a name known to all
Other causes of oil leaks at the back of the "385" series engines is the oil pressure sender, which is right behind the intake manifold, the rear seal of the intake manifold, and valve covers. Oil runs down from any or all of these areas and appears like it could be coming from the pan or main seal. Not saying it is, just something else to check.
__________________

Wayne
52 Mercury M-1
among other things.
Reply With Quote
  #4  
Old 07-02-2014, 11:45 PM
smallello's Avatar
smallello smallello is offline
Elder User
 
Join Date: Mar 2006
Location: NW Valley AZ
Posts: 599
smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.
Thanks guys. Yeah, I checked and there is no oil coming from the top of the motor. Valve covers and oil pressure sender intake, all dry.

I see what youre saying truckeemtnfords, that seal looks like its folded over on itself.
Reply With Quote
  #5  
Old 07-03-2014, 01:49 PM
truckeemtnfords truckeemtnfords is offline
Posting Guru
 
Join Date: Nov 2006
Location: Truckee, CA
Posts: 1,622
truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.
I could see something wrong but was not quite sure in the photo what it was. If it is folded over that definitely would cause you problems.
__________________
Dave
2002 F-250 XLT 4x4 7.3 Auto CC LB
1955 F-100 302 T-5 9"
Reply With Quote
  #6  
Old 07-03-2014, 03:05 PM
smallello's Avatar
smallello smallello is offline
Elder User
 
Join Date: Mar 2006
Location: NW Valley AZ
Posts: 599
smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.
I wanted to make sure it wasn't the rear main seal before I put it all back together but that gasket does seem to be the real problem.

I am going to replace the pan too, its pretty beat up. I don't know much about pans so I am going to start a new thread about select one... after I search.
Reply With Quote
  #7  
Old 07-04-2014, 12:58 PM
petemcl's Avatar
petemcl petemcl is online now
Still Learnin'
 
Join Date: Nov 2011
Location: Northville, MI
Posts: 1,340
petemcl has a good reputation on FTE.petemcl has a good reputation on FTE.
Most auto parts stores sell small bottles of UV dye. Then all you need is a cheap blacklight bulb to put in your shop light. This helps trace the source of your leak. It is particularly useful finding pinholes in castings like engine blocks but it works well for all oil leaks.
__________________
Pete
Northville, Michigan
2013 Jeep Grand Cherokee Overland Summit
2011 John Deere 2520
1950 Ford F2 w/flathead V8/4-speed
. . .
Reply With Quote
  #8  
Old 07-11-2014, 07:43 PM
smallello's Avatar
smallello smallello is offline
Elder User
 
Join Date: Mar 2006
Location: NW Valley AZ
Posts: 599
smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.
The UV dye would have been a good idea but I took it all apart already. I will have to keep that in mind if I get another leak... lets hope I never need it.
Reply With Quote
  #9  
Old 07-11-2014, 07:58 PM
smallello's Avatar
smallello smallello is offline
Elder User
 
Join Date: Mar 2006
Location: NW Valley AZ
Posts: 599
smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.smallello has a very good reputation on FTE.
So now that I have it all apart and cleaned up, I'm trying to decide if I should just change the rear main seal anyway.

It doesn't look like there's oil behind it. I don't know of a way to be sure it's bad but if I don't change it and it leaks after, I will have to do it all again!

I know, this seams like a therapy session but I am looking for opinions... this is what t looks like now.

Name:  20140711_152803c.jpg
Views: 63
Size:  134.8 KB
Reply With Quote
  #10  
Old 07-12-2014, 08:20 PM
truckeemtnfords truckeemtnfords is offline
Posting Guru
 
Join Date: Nov 2006
Location: Truckee, CA
Posts: 1,622
truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.
I don't see any signs of oil behind it, except what would have come from the pan seal. There is a lot of extra work to replace the rear main correctly so only you can determine if that is something you want to tackle now. Prime driving season right now for most us so I would throw it back together and drive it. If it leaks put "mechanic in a can" in the engine and wait until cooler weather to pull it apart, but then again you are in AZ which is always prime driving season unless you are in the mts like Flagstaff.
__________________
Dave
2002 F-250 XLT 4x4 7.3 Auto CC LB
1955 F-100 302 T-5 9"
Reply With Quote
  #11  
Old 07-12-2014, 08:31 PM
NumberDummy's Avatar
NumberDummy NumberDummy is offline
Ford Parts Specialist
 
Join Date: Nov 2006
Location: Hacienda Heights CA
Posts: 56,247
NumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputation
----------------
__________________
Bill / Retired Ford Parts Manager / SoCal Chapter Member / Part number research: 1928/2001 trucks & 1928/89 passenger cars.

2013 Escape FWD 2.0L Eco-Boost
Reply With Quote
  #12  
Old 07-12-2014, 08:43 PM
truckeemtnfords truckeemtnfords is offline
Posting Guru
 
Join Date: Nov 2006
Location: Truckee, CA
Posts: 1,622
truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.truckeemtnfords has a very good reputation on FTE.
Bill, I think you posted to the wrong thread, this one is about an engine oil leak at the rear of the engine.
__________________
Dave
2002 F-250 XLT 4x4 7.3 Auto CC LB
1955 F-100 302 T-5 9"
Reply With Quote
  #13  
Old 07-12-2014, 08:50 PM
NumberDummy's Avatar
NumberDummy NumberDummy is offline
Ford Parts Specialist
 
Join Date: Nov 2006
Location: Hacienda Heights CA
Posts: 56,247
NumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputation
Quote:
Originally Posted by truckeemtnfords View Post
Bill, I think you posted to the wrong thread, this one is about an engine oil leak at the rear of the engine.
I posted in the correct thread, but...

The post has gone bye bye now...
__________________
Bill / Retired Ford Parts Manager / SoCal Chapter Member / Part number research: 1928/2001 trucks & 1928/89 passenger cars.

2013 Escape FWD 2.0L Eco-Boost
Reply With Quote
Old 07-12-2014, 08:50 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Replaced oil pan gasket 4.0 jetfiremuck Aerostar 1 02-11-2013 10:26 PM
massive oil leak jack90 1973 - 1979 F-100 & Larger F-Series Trucks 3 09-07-2010 07:32 PM
5.8 oil pan seal and rear main seal questions BT885.0 1987 - 1996 F150 & Larger F-Series Trucks 13 07-26-2010 09:31 AM
TC Dust Cover (Plate Assy, Engine Rear) Gasket oltoole New Member Introductions 1 10-16-2007 05:45 PM
Oil leak at rear of engine Crumm FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428) 6 12-08-2003 09:28 AM


Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1948 - 1956 F1, F100 & Larger F-Series Trucks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 07:42 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup