It is currently Fri Dec 19, 2014 3:12 am





Post new topic Reply to topic  [ 48 posts ] 
rear main seal installation... 
Author Message
Registered User

Joined: Tue Feb 01, 2011 12:38 am
Posts: 33
Post rear main seal installation...
hello all, i have searched and cannot find any information in this forum about installing the rear main seal. i am about ready to put my motor together and would rather know ahead of time what i need. thanks in advance. paul.

_________________
1966 f250 300/4sp/dealer a/c 1966 dodge d300 318 4sp dually 1963 d100 318 4sp 1962 ihc 266 4sp 8.5 ft bed dually by or. owner


Tue Mar 22, 2011 1:40 pm
Profile
VIP Member
User avatar

Joined: Sat Nov 09, 2002 10:25 pm
Posts: 4689
Location: FRENCHTOWN
Post Re: rear main seal installation...
tHE REAR MAIN SEAL NSTALLS AFTER THE REAR mAIN CAP IS TORQUED IN PLACE. It is best done using a seal driver w/ a hammer but it can also be hammered into place by placing a piece of flat hardwood on the edge of the seal and tapping it in. Start one side and then tap the opposite side and move around the seal tapping it until the edge of the seal is flush with the rear surface of the block/cap. Don't tap it in too far. Be sure to lube the crank and seal lip with oil.

By the way, a dual-lip seal from a Modular V8 works too.

_________________
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING


Tue Mar 22, 2011 4:25 pm
Profile
Registered User

Joined: Tue Feb 01, 2011 12:38 am
Posts: 33
Post Re: rear main seal installation...
thanks FTF, so what you are saying the rear main seal from a 4.6/5.4 has two lips and is better? thanks in advance... paul.

_________________
1966 f250 300/4sp/dealer a/c 1966 dodge d300 318 4sp dually 1963 d100 318 4sp 1962 ihc 266 4sp 8.5 ft bed dually by or. owner


Tue Mar 22, 2011 6:53 pm
Profile
VIP Member
User avatar

Joined: Sat Nov 09, 2002 10:25 pm
Posts: 4689
Location: FRENCHTOWN
Post Re: rear main seal installation...
They have an inner sealing lip and an outer "dust shield" lip. The extra lip provides an extra measure of protection against wearing a groove in the crank.

_________________
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING


Wed Mar 23, 2011 9:56 pm
Profile
Registered User

Joined: Tue Feb 01, 2011 12:38 am
Posts: 33
Post Re: rear main seal installation...
thank you FTF, i appreciate the clarification. i will try to post some pictures when i assemble the motor. right now i am painting the sheet metal for the motor. the bigger prodject is cleaning up the garage. i have a substantial INVENTORY to catalog. yah right. to add to this my friend mailed the title to his 1968 international 4x4 this week. like i can pass on that for six bills. did not even ask when i was going to pay him. i live old school. i digress. tommorow i pick the block up in colfax. sheet metal and intake hot tanked , pistons and rods hung, and cam bearings installed- $97.00. later. paul.

_________________
1966 f250 300/4sp/dealer a/c 1966 dodge d300 318 4sp dually 1963 d100 318 4sp 1962 ihc 266 4sp 8.5 ft bed dually by or. owner


Wed Mar 23, 2011 10:27 pm
Profile
Registered User

Joined: Sat Mar 24, 2007 5:38 pm
Posts: 847
Location: Fresno, CA.
Post Re: rear main seal installation...
A short piece of 4" Schedule 40 PVC is a very good size for making a seal driver. I think I might have went around it with a file to get the size just right, but it worked great. Put a chunk of 2 x 4 on the end of the PVC and tap it in the center of the pipe.

John/Fresno


Thu Mar 24, 2011 1:25 am
Profile
Registered User

Joined: Tue Feb 01, 2011 12:38 am
Posts: 33
Post Re: rear main seal installation...
thanks john, i honestly would have bought the real tool if i could have found one. i will look at the hardware store today. between my box of hardwood scraps and pvc pipe it should not be a problem. paul.

_________________
1966 f250 300/4sp/dealer a/c 1966 dodge d300 318 4sp dually 1963 d100 318 4sp 1962 ihc 266 4sp 8.5 ft bed dually by or. owner


Thu Mar 24, 2011 9:47 am
Profile
Registered User

Joined: Sun Nov 17, 2002 11:52 pm
Posts: 600
Location: Pascagoula Mississippi
Post Re: rear main seal installation...
THE FRENCHTOWN FLYER wrote:

By the way, a dual-lip seal from a Modular V8 works too.



Its good to know this, seeing as I'm assembling my new engine. I'll have to consider the dual-lip seal as an upgrade to the factory one piece unit. FTF you are just a wealth of knowledge!

_________________
83 F150 2wd: Clifford 4bbl intake, Holley 4160, EFI long-reach plugs, EFI exhaust.
3.55 Axle swap coming soon...


Thu Mar 24, 2011 10:27 pm
Profile YIM
Registered User

Joined: Tue Feb 01, 2011 12:38 am
Posts: 33
Post Re: rear main seal installation...
good news! i found the rotunda ford 4.9 rear seal driver. thirty and change shipped. i am thrilled.(tool fetish) paul.

_________________
1966 f250 300/4sp/dealer a/c 1966 dodge d300 318 4sp dually 1963 d100 318 4sp 1962 ihc 266 4sp 8.5 ft bed dually by or. owner


Fri Mar 25, 2011 12:48 am
Profile
Registered User
User avatar

Joined: Tue Feb 23, 2010 11:59 am
Posts: 52
Post Re: rear main seal installation...
Not meant to be a hijack, but does anyone have the part number for the correct modular seal? If not, what years/sizes work?

Counter monkeys at the local parts stores can't seem to find a windshield wiper without knowing if you have an auto or manual trans, so I am sure if I walk in and ask for a rear main seal for a mod motor their eyes will roll up into their heads and I will stand there.... waiting .... while they call the manager .... :bang:

Thanks for any assistance!

Eric

_________________
Got Ford?
3 Early Broncos, 2 Classic Mustangs, 68 F100, 71F250 4x4, 2 Lincoln Mark VIII - BF Penn


Fri Mar 25, 2011 8:39 am
Profile
FSP Moderator

Joined: Fri May 16, 2003 10:25 pm
Posts: 6274
Location: Careywood, Idaho
Post Re: rear main seal installation...
NAPA has a pretty good on-line parts list. Trouble is, I don't have a clue what a "Modular V8" is.

So, my question is: What is a Modular V8 called? What size, year?

_________________
74 F-350 300-6, EFI manifolds into single exhaust, Carter YF, T-18B, Dana70 w/4.11, Flatbed dually w/dump bed. Great farm truck!
Image


Fri Mar 25, 2011 9:09 am
Profile
Registered User

Joined: Tue Feb 01, 2011 12:38 am
Posts: 33
Post Re: rear main seal installation...
hi JW, i believe the moduler engine is the 4.6/5.4 . this may also include the 3.0 v-6 as when i was looking for the main seal installer i had to look up other applications, the look thru the stores inventory. i found a tool for removing the 4.6/3.0 rear seal then searched store for what i wanted. PLEASE VERIFY as i have not checked this out beyond this. may the more knowledgable masters share their wisdom. paul.

_________________
1966 f250 300/4sp/dealer a/c 1966 dodge d300 318 4sp dually 1963 d100 318 4sp 1962 ihc 266 4sp 8.5 ft bed dually by or. owner


Fri Mar 25, 2011 11:06 am
Profile
FSP Moderator

Joined: Fri May 16, 2003 10:25 pm
Posts: 6274
Location: Careywood, Idaho
Post Re: rear main seal installation...
Anyone know what year/type vehicle in which this elusive Modular V8 may be lurking?

_________________
74 F-350 300-6, EFI manifolds into single exhaust, Carter YF, T-18B, Dana70 w/4.11, Flatbed dually w/dump bed. Great farm truck!
Image


Fri Mar 25, 2011 11:22 am
Profile
Registered User

Joined: Tue Oct 14, 2008 11:11 am
Posts: 91
Location: Maryland
Post Re: rear main seal installation...
I am wondering about this seal as well. According to the Timken seal application book, the 300 takes a Timken 2377 seal. The 4.6L and 5.4L modular V8 takes a Timken 3909. However:

Timken 2377 is for a shaft diameter of 3.75" and presses into a bore of 4.501"
Timken 3909 is for a shaft diameter of 3.625" and presses into a bore of 4.24"

Maybe I looked up the wrong engines?


Fri Mar 25, 2011 12:58 pm
Profile
Global Moderator
User avatar

Joined: Sun Jan 03, 2010 5:46 pm
Posts: 6004
Location: Flagstaff, Az. 86005 near the old Route 66
Post Re: rear main seal installation...
The 4.6 V8 Mod motors were first put in the Lincolns in 1991, 92 into the Crown Vic's, Tbird's about 95 in Mustangs about 96 or 97. 97 for trucks.

_________________
A bad day Drag Racing is still better than a good day at work!

My fleet of Sixes: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.


Fri Mar 25, 2011 3:54 pm
Profile
VIP Member
User avatar

Joined: Tue Mar 21, 2006 11:14 pm
Posts: 2669
Location: LaFollette Tn.
Post Re: rear main seal installation...
:? Just a quick question.What year did Ford start with the one piece seal in the 300?
Thanks.
Leo

_________________
"People never lie so much as after a hunt,during a war,or before an election".
Otto von Bismarck


Fri Mar 25, 2011 11:20 pm
Profile
VIP Member
User avatar

Joined: Sat Nov 09, 2002 10:25 pm
Posts: 4689
Location: FRENCHTOWN
Post Re: rear main seal installation...
Lazy JW wrote:
So, my question is: What is a Modular V8 called? What size, year?


4.6, 5.4, 6.8

Unless there has been a change in the modular seal it should fit. I've been using them.

_________________
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING


Sat Mar 26, 2011 9:49 am
Profile
VIP Member
User avatar

Joined: Sat Nov 09, 2002 10:25 pm
Posts: 4689
Location: FRENCHTOWN
Post Re: rear main seal installation...
woodbutcher wrote:
:? Just a quick question.What year did Ford start with the one piece seal in the 300?
Thanks.
Leo


1965

The one piece pan seal came along about 1986.

_________________
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING


Sat Mar 26, 2011 9:51 am
Profile
Registered User
User avatar

Joined: Tue Feb 23, 2010 11:59 am
Posts: 52
Post Re: rear main seal installation...
FTF,

I am not trying to be obtuse, nor am I trying to be difficult, but if the information provided by FordJim is correct, how are you using the ones he listed? There is over 1/4" diference in the OD of the seals, and even for an intereference fit that is a bit much... ;)

I will probably just use the C7 seal I already have, but I find the situation interesting.

Can you please add some more information to clarify?

Thanks in advance for your additional input.

_________________
Got Ford?
3 Early Broncos, 2 Classic Mustangs, 68 F100, 71F250 4x4, 2 Lincoln Mark VIII - BF Penn


Sat Mar 26, 2011 10:01 am
Profile
FSP Moderator

Joined: Fri May 16, 2003 10:25 pm
Posts: 6274
Location: Careywood, Idaho
Post Re: rear main seal installation...
FordJim wrote:
I am wondering about this seal as well. According to the Timken seal application book, the 300 takes a Timken 2377 seal. The 4.6L and 5.4L modular V8 takes a Timken 3909. However:

Timken 2377 is for a shaft diameter of 3.75" and presses into a bore of 4.501"
Timken 3909 is for a shaft diameter of 3.625" and presses into a bore of 4.24"

Maybe I looked up the wrong engines?


Hmmmmm...
I looked up the rear main seal for the 300 (1985) and the 4.6 (1997) on the NAPA website; I came up with the same dimensions as FordJim.

I had previously done some searching and found that the NAPA Part# FPG BS40645 seal can be used on early and late 300's also the late 351W. In my notes I wrote "Is this the same as a FM 5278"?
The quest continues.
Joe

_________________
74 F-350 300-6, EFI manifolds into single exhaust, Carter YF, T-18B, Dana70 w/4.11, Flatbed dually w/dump bed. Great farm truck!
Image


Sat Mar 26, 2011 1:07 pm
Profile
FSP Moderator

Joined: Fri May 16, 2003 10:25 pm
Posts: 6274
Location: Careywood, Idaho
Post Re: rear main seal installation...
Also found this seal listed for a 351W.




Qty

Rear Main Seal Set - Hi-Perf
Product Line: FEL-PRO Gaskets
Part Number: FPG 2942RS
Price:
Price
Unit
:
:
21.49
Each
Features & Benefits Premium PTFE; High Performance One Piece Rear Main Bearing Seal.; Designed for High Vacuum Applications.
Warranty Warrantied to be Free from Defects in Workmanship or Material for One Year from Date of Purchase. Breach of Warranty is Limited to Free Exchange of Product if Part Found to be Defective. Liability for Neglect, Misuse or Incidental Damages is Disclaimed.
Warranty PDF
Material Safety Data Sheet There is no MSDS for this item
Application Information: 1995 Ford Truck F150 1/2 Ton - Pickup
Engines : 5.8 L 351 CID V8 Windsor
Engine VIN Codes : H
Comments: Windsor Eng.;Premium PTFE;1 Piece High Vacuum;3.684" X 4.515" X .390"
Per Car Qty: 1

Engines : 5.8 L 351 CID V8 Windsor
Engine VIN Codes : R
Comments: Windsor Eng.;Premium PTFE;1 Piece High Vacuum;3.684" X 4.515" X .390"
Per Car Qty: 1

I may have to see if I can inspect one of these in person.
Joe

_________________
74 F-350 300-6, EFI manifolds into single exhaust, Carter YF, T-18B, Dana70 w/4.11, Flatbed dually w/dump bed. Great farm truck!
Image


Sat Mar 26, 2011 1:19 pm
Profile
Registered User

Joined: Tue Feb 01, 2011 12:38 am
Posts: 33
Post Re: rear main seal installation...
all good imformation, i hope someone can verify this. say a little prayer to the all knowing ford gurus.. paul.

_________________
1966 f250 300/4sp/dealer a/c 1966 dodge d300 318 4sp dually 1963 d100 318 4sp 1962 ihc 266 4sp 8.5 ft bed dually by or. owner


Sat Mar 26, 2011 1:49 pm
Profile
VIP Member
User avatar

Joined: Tue Mar 21, 2006 11:14 pm
Posts: 2669
Location: LaFollette Tn.
Post Re: rear main seal installation...
:beer: Hi FTF.Thanks.
Leo

_________________
"People never lie so much as after a hunt,during a war,or before an election".
Otto von Bismarck


Sat Mar 26, 2011 8:14 pm
Profile
VIP Member
User avatar

Joined: Sat Nov 09, 2002 10:25 pm
Posts: 4689
Location: FRENCHTOWN
Post Re: rear main seal installation...
Hmmm. Unfortunately I'm in the Florida Keys working on my tan for a while so I'm unable to check my records. My recollection was that the dual lip seal I am using was originally for the mod motor. I hope nobody acted on my erroneous info if that be the case.

_________________
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING


Sun Mar 27, 2011 1:53 pm
Profile
FSP Moderator

Joined: Fri May 16, 2003 10:25 pm
Posts: 6274
Location: Careywood, Idaho
Post Re: rear main seal installation...
THE FRENCHTOWN FLYER wrote:
Hmmm. Unfortunately I'm in the Florida Keys working on my tan ....


Tough duty, but someone has to do it :lol:

_________________
74 F-350 300-6, EFI manifolds into single exhaust, Carter YF, T-18B, Dana70 w/4.11, Flatbed dually w/dump bed. Great farm truck!
Image


Sun Mar 27, 2011 4:32 pm
Profile
VIP Member
User avatar

Joined: Tue Mar 21, 2006 11:14 pm
Posts: 2669
Location: LaFollette Tn.
Post Re: rear main seal installation...
:rolflmao: Hi FTF.Tan OR surface rust?
Have fun.
Leo

_________________
"People never lie so much as after a hunt,during a war,or before an election".
Otto von Bismarck


Sun Mar 27, 2011 5:01 pm
Profile
Registered User

Joined: Sat Jun 05, 2004 10:47 pm
Posts: 1002
Location: The Emerald City
Post Re: rear main seal installation...
He means tan. Surface rust is what we get in Seattle.

My memory isn't what it used to be, and never was, but I thought I recalled the 240 in my '66 Econoline having a rope seal . . . maybe I'm thinking of a couple of old Rambler sixes I built in those years . . .

I am becoming more and more cognizant of the wisdom of this assertion by J. Danforth Quale: "What a waste it is to lose one's mind. Or not to have a mind is being very wasteful. How true that is!"

_________________
"A woman is only a woman, but B Stock Hydro is a Ride!


Tue Mar 29, 2011 3:57 pm
Profile
Registered User

Joined: Tue Feb 01, 2011 12:38 am
Posts: 33
Post Re: rear main seal installation...
Seattle Smitty, all 240/300s have a one peice main seal including my 65. paul.

_________________
1966 f250 300/4sp/dealer a/c 1966 dodge d300 318 4sp dually 1963 d100 318 4sp 1962 ihc 266 4sp 8.5 ft bed dually by or. owner


Tue Mar 29, 2011 6:19 pm
Profile
Registered User

Joined: Sat Jun 05, 2004 10:47 pm
Posts: 1002
Location: The Emerald City
Post Re: rear main seal installation...
I have an excellent memory; it's just short.

_________________
"A woman is only a woman, but B Stock Hydro is a Ride!


Wed Mar 30, 2011 4:32 pm
Profile
Global Moderator
User avatar

Joined: Sun Jan 03, 2010 5:46 pm
Posts: 6004
Location: Flagstaff, Az. 86005 near the old Route 66
Post Re: rear main seal installation...
:rolflmao: got that same condistion

_________________
A bad day Drag Racing is still better than a good day at work!

My fleet of Sixes: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.


Wed Mar 30, 2011 11:01 pm
Profile
VIP Member
User avatar

Joined: Tue Mar 21, 2006 11:14 pm
Posts: 2669
Location: LaFollette Tn.
Post Re: rear main seal installation...
:rolflmao: Hi SS.X2.
Leo

_________________
"People never lie so much as after a hunt,during a war,or before an election".
Otto von Bismarck


Thu Mar 31, 2011 1:42 am
Profile
Registered User

Joined: Tue Aug 24, 2010 11:09 am
Posts: 78
Location: KS
Post Re: rear main seal installation...
Use Ford part # F4AZ-6701-A

fits the Duratec and Triton line of engines from 92 to current in sizes 2.5L,3.0L,4.6L,5.4L and 6.8L

OEM part #F1TZ-6701-A is the one for the 4.9L


Now going by Napa #NOS-37338 which interchanges with the F1TZ-6701-A

Specs are
Rear Main Seal I.D. : 3.75"
Rear Main Seal O.D. : 4.517"
Rear Main Seal Width : .381"

which measuring a F4AZ-6701-A in the package still with a micrometer it is close enough I think it would work and will try it on my own 4.9L

BTW I work in a Ford dealership parts department, I just didn't have an F1TZ-6701-A in stock to compare.

_________________
1990 F-150 4.9L (project)
2010 F-150 5.4 (daily driver)


Thu Mar 31, 2011 12:36 pm
Profile
VIP Member
User avatar

Joined: Sat Nov 09, 2002 10:25 pm
Posts: 4689
Location: FRENCHTOWN
Post Re: rear main seal installation...
I'm home now.

Here are photos of the single lip 300 seal and the dual lip seal - in brown - I have been using.

Unfortunately I can't locate the part number of the seal. Can anyone identify it by looking at the photo?

Image

Image

_________________
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING


Fri Apr 01, 2011 6:36 pm
Profile
Registered User

Joined: Tue Aug 24, 2010 11:09 am
Posts: 78
Location: KS
Post Re: rear main seal installation...
Info is in my previous post for parts #'s to cross reference

_________________
1990 F-150 4.9L (project)
2010 F-150 5.4 (daily driver)


Fri Apr 01, 2011 6:40 pm
Profile
VIP Member
User avatar

Joined: Sat Nov 09, 2002 10:25 pm
Posts: 4689
Location: FRENCHTOWN
Post Re: rear main seal installation...
90F150Custom wrote:
Info is in my previous post for parts #'s to cross reference

Thanks. We seemed to have homed in on it.

_________________
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING


Fri Apr 01, 2011 7:01 pm
Profile
Global Moderator
User avatar

Joined: Sun Jan 03, 2010 5:46 pm
Posts: 6004
Location: Flagstaff, Az. 86005 near the old Route 66
Post Re: rear main seal installation...
Was doing small repairs on my old 94 Wednesday and noticed the oil bottom of bell. Looks like it will be time to replace it.

_________________
A bad day Drag Racing is still better than a good day at work!

My fleet of Sixes: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.


Fri Apr 01, 2011 8:37 pm
Profile
Registered User
User avatar

Joined: Tue Feb 23, 2010 11:59 am
Posts: 52
Post Re: rear main seal installation...
Well,

I would have to say that there are some errors here.

I just crossed F4AZ-6701-A to National 3909. It is 3.85" OD

I measured the one I removed from my engine C7AE-9701-B. It is 4.5" OD.

I am not sure how these are supposed to be compatible.

Tomorrow I will buy the one for the 351W as suggested by Lazy JW.


Any other suggestions?


TIA,

Eric

_________________
Got Ford?
3 Early Broncos, 2 Classic Mustangs, 68 F100, 71F250 4x4, 2 Lincoln Mark VIII - BF Penn


Sat Apr 02, 2011 8:41 pm
Profile
Registered User

Joined: Tue Aug 24, 2010 11:09 am
Posts: 78
Location: KS
Post Re: rear main seal installation...
I can't speak for non oem parts. Just what I had in my hand off the shelf

_________________
1990 F-150 4.9L (project)
2010 F-150 5.4 (daily driver)


Sat Apr 02, 2011 9:05 pm
Profile
Registered User
User avatar

Joined: Tue Feb 23, 2010 11:59 am
Posts: 52
Post Re: rear main seal installation...
Ok,

Just got back from Advance Auto.

They list the same part for:
95 F150 5.8 (H)
95 F150 4.9
78 F150 4.9

Of course they didn't have it in stock... :roll:

The mod motor (F4xx part number listed above) won't work.

I ordered the part from NAPA so we will see how it fits Tuesday...

hth,

eric

_________________
Got Ford?
3 Early Broncos, 2 Classic Mustangs, 68 F100, 71F250 4x4, 2 Lincoln Mark VIII - BF Penn


Sun Apr 03, 2011 3:17 pm
Profile
Registered User
User avatar

Joined: Tue Feb 23, 2010 11:59 am
Posts: 52
Post Re: rear main seal installation...
So,

i just got back from NAPA...

FelPro BS 40645 is the correct hi-performance seal (Teflon). I have it in my car and will take pics and install it tonight.

By label it fits the 351W as suggested by Lazy JW and is listed to fit the 300 (4.9) too.

HTH,

Eric

_________________
Got Ford?
3 Early Broncos, 2 Classic Mustangs, 68 F100, 71F250 4x4, 2 Lincoln Mark VIII - BF Penn


Tue Apr 05, 2011 12:53 pm
Profile
Registered User

Joined: Tue Aug 24, 2010 11:09 am
Posts: 78
Location: KS
Post Re: rear main seal installation...
I ordered in the seal for the 4.9( I have to replace mine anyway) and will take pics when it gets here

_________________
1990 F-150 4.9L (project)
2010 F-150 5.4 (daily driver)


Tue Apr 05, 2011 2:19 pm
Profile
Registered User

Joined: Tue Dec 28, 2004 2:00 pm
Posts: 427
Location: Strasburg, VA
Post Re: rear main seal installation...
my rear main has been leaking for a while. really dreading replacing it though.. good info on the double lip. i'll have to keep an eye on this thread.

_________________
87 F150 with a big six.

finally got the wheels on.. only after 5 years..


Tue Apr 05, 2011 4:52 pm
Profile
Registered User
User avatar

Joined: Tue Feb 23, 2010 11:59 am
Posts: 52
Post Re: rear main seal installation...
OK,

Felpro BS 40645 works. It is the teflon version (~$21). There is one that is not teflon (~$14).

It is the 2 lip seal for the 351W (after 7/10/83-91), (4.9L) 300 65-97

I have pics, but probably won't get them uploaded tonight.

Enjoy!

Eric

_________________
Got Ford?
3 Early Broncos, 2 Classic Mustangs, 68 F100, 71F250 4x4, 2 Lincoln Mark VIII - BF Penn


Tue Apr 05, 2011 9:46 pm
Profile
Registered User

Joined: Tue Feb 01, 2011 12:38 am
Posts: 33
Post Re: rear main seal installation...
thanks to everyone for all the information. this forum and others like it make it much easier than the old way of asking one or two sources and hoping for the best. i think i need the teflon seal! paul.

_________________
1966 f250 300/4sp/dealer a/c 1966 dodge d300 318 4sp dually 1963 d100 318 4sp 1962 ihc 266 4sp 8.5 ft bed dually by or. owner


Tue Apr 05, 2011 11:44 pm
Profile
FSP Moderator

Joined: Fri May 16, 2003 10:25 pm
Posts: 6274
Location: Careywood, Idaho
Post Re: rear main seal installation...
71PA_Highboy wrote:
OK,

Felpro BS 40645 works. It is the teflon version (~$21). There is one that is not teflon (~$14).

It is the 2 lip seal for the 351W (after 7/10/83-91), (4.9L) 300 65-97

I have pics, but probably won't get them uploaded tonight.

Enjoy!

Eric


Thanks Eric!
:thumbup: :nod:

_________________
74 F-350 300-6, EFI manifolds into single exhaust, Carter YF, T-18B, Dana70 w/4.11, Flatbed dually w/dump bed. Great farm truck!
Image


Wed Apr 06, 2011 9:50 pm
Profile
Registered User
User avatar

Joined: Tue Feb 23, 2010 11:59 am
Posts: 52
Post Re: rear main seal installation...
Pics as promised.

The Felpro seal:
Image
Image

an original ford C7 seal:
Image
Image

if there are any questions, just ask!

_________________
Got Ford?
3 Early Broncos, 2 Classic Mustangs, 68 F100, 71F250 4x4, 2 Lincoln Mark VIII - BF Penn


Fri Apr 08, 2011 9:43 am
Profile
Registered User

Joined: Tue Aug 24, 2010 11:09 am
Posts: 78
Location: KS
Post Re: rear main seal installation...
Ok, Got the F1TZ6701A in stock. It is a superseded part # that is a double lip seal and it also fits the 351W. So a Mod Engine seal will not fit.



So the above statements are correct.

_________________
1990 F-150 4.9L (project)
2010 F-150 5.4 (daily driver)


Tue Apr 19, 2011 3:49 pm
Profile
Registered User

Joined: Mon Jun 30, 2003 5:12 pm
Posts: 547
Location: Parkville, MO
Post Re: rear main seal installation...
I confess that I don't come back here often enough. Took me 15 minutes of h*ll to get logged in....

Here is the text of my 2009 post on this subject -- too bad the search function either doesn't work or was not used...

____________________________________________________________________________________________________

The late era 4.9 takes the same seal as the 351. Interestingly, the early 351w had smaller rear main seals than the 4.9. Somewhere along the way (I researched this in detail before I replaced my rear main) Ford redesigned the seal for the 351w (and I think 302 etc as well, same block....) and used the same dimentions as the 300. (Another example of a 300 being superior to a SBF)

The material is differnt and the seal has an outer plastic dust seal. It is NOT a double lip seal as some have suggested. However, it is possible that the newer style seal does run in a little different location on the crank, which would be of advantage if there was some scorring (and you were too lazy to sleave the crank).

You don't have to ask for the modular V-8 seal -- just get one for a 95 4.9 The part numbers are the same. FWIW, My Federal Mogul / National Box has #5278 on it, and I can vouch that it drops into an early 240 block quite nicely.

I have no idea why they still make the old rubber seal with a spring in it. But if you look up the rear main for an early 300 you will get the old seal. If you look up the seal for a 95, you get the new one. Block and crank are the same......

As suggested, two sheet metal screws at 180 degrees. I used a cats paw (nail puller for nails) that I had laying around and it worked incredibly well. I also took a nice soft piece of 2x4 and whittled (I work with wood as well) a wood block that matched the curve of the new seal. Its large and tapping around the periphery of the thing often results in it just tilting in the race. Anyhow, the whittled wood tool worked real nice too, but a hammer and little block of any old soft wood works too I'd guess.....

_______________________________________________________________________________________________________

_________________
'65 F100 240, swapped to C4, Autolite 1101, Pertronix


Mon Apr 25, 2011 11:32 pm
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 48 posts ] 


Who is online

Users browsing this forum: Google [Bot], Yahoo [Bot] and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © phpBB Group.
Designed by Vjacheslav Trushkin for Free Forum/DivisionCore.