• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Engine Rear Main

  • Thread starter Thread starter RangerJoe
  • Start date Start date May 11, 2015

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
2,560
1,146
184
Georgia
May 11, 2015
#1
  • May 11, 2015
  • #1
Fighting a leak from bellhousing. I had a leaking main years ago on another motor, but can't recall specifics.

Oil is currently dripping from the area between the bellhousing and the backing plate. None on the backside of the backing plate, and appears as if there is an oil film inside the bellhousing.

I used loctitie on flywheel bolts. I assume this is the rear main seal, but I am baffled as to why oil is only in the bellhousing.

Is this typical of a rear main leak? No oil on backside of the motor btw.

Joe
 

mikestang63

SN Certified Technician
Aug 27, 2012
11,606
8,859
214
In the garage
May 11, 2015
#2
  • May 11, 2015
  • #2
Could be

  • rear main seal
  • Rear lower intake gasket
  • Rear galley plug
  • Excessive crank case pressure

You use loctite on the flywheel bolts, what about thread sealer? If not, there's your leak.
 

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
2,560
1,146
184
Georgia
May 11, 2015
#3
  • May 11, 2015
  • #3
1. Rear main seal: probably so...

2. Lower intake gasket: Nope, checked that.

3. Rear galley plug: the only one I can picture is the plug for the cam bore, is there another?

4. Loctite: that is what I have always used without a leak, but, it was on my mind because of the oil being only in the bellhousing.

So intake it from your response that you don't think it would be too out of place for the rear main leak to be totally isolated inside the bellhousing?

Joe
 

Jared Hess

Member
Dec 18, 2012
76
9
18
Six Mile Run, PA
May 11, 2015
#4
  • May 11, 2015
  • #4
I just replaced my rear main with the same issue just inside the bellhousing would then drip from flex plate and also ruined clutch but yea definitely plausable.
 
Reactions: RangerJoe

elarm1

10 Year Member
Dec 17, 2010
1,428
652
154
N.Va
May 15, 2015
#5
  • May 15, 2015
  • #5
I just put this motor together and mine does the same. Can't really explain it because everything and I mean everything is new..... I guess I can live with it
 
You must log in or register to reply here.

Similar threads

P
Engine Mysterious coolant leak at back of engine
  • palerider94
  • Jan 18, 2026
  • Fox 5.0 Mustang Tech
Replies
1
Views
164
Fox 5.0 Mustang Tech Jan 19, 2026
AeroCoupe
S
Drivetrain 8.8 Pinion and 302 rear main seal leaks after replacing. 93 5.0 with t-5
  • Steigy4827
  • Jun 23, 2025
  • Fox 5.0 Mustang Tech
Replies
10
Views
613
Fox 5.0 Mustang Tech Apr 1, 2026
Steigy4827
S
N
Edelbrock 1405 Setup
  • nathantaylor200
  • Nov 4, 2025
  • Classic Mustang Specific Tech
Replies
3
Views
196
Classic Mustang Specific Tech Nov 5, 2025
nathantaylor200
N
J
2004 Mustang 3.8L V6 vibrations above 65 MPH and differential leaks
  • joeybuddy96
  • Mar 16, 2026
  • SN95 V6 Mustang Tech
Replies
13
Views
388
SN95 V6 Mustang Tech Monday at 2:45 PM
joeybuddy96
J
New Member with a 1992
  • Clutchfork
  • Oct 18, 2025
  • The Welcome Wagon
Replies
5
Views
259
The Welcome Wagon Oct 19, 2025
Clutchfork
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?