M38A1 engine gaskets

Discussion topics on Willys Overland M series vehicles
Post Reply
User avatar
ChiGuy82
Member
Posts: 41
Joined: Sat May 02, 2009 6:00 pm

M38A1 engine gaskets

Post by ChiGuy82 »

Hey guys,
I am about to mate the T-90 transmission bellhousing to the back of the F-134 engine and before I do, I was wondering if anyone knows about a gasket that is supposed to go in between? I have looked at the different downloads and my manual that I have at the house and I can't find anything that says I should.

Anyone have any answers? Where I can find it so I can buy it?

If there is no gasket, does anyone have any tips on mating the bellhousing and engine?

Thanks,
Mike
User avatar
wilfreeman
Jeep Legend
Jeep Legend
Posts: 1079
Joined: Sun Mar 12, 2006 6:00 pm
Location: Richburg, SC
Contact:

Post by wilfreeman »

The gasket came with my gasket set. I'm sure you can buy it from one of the main dealers, or order it from a parts store. I didn't use mine (can't recall why), and have had no problems - I would imagine they were used to provide a water tight seal for fording?
Matt
1953 M38a1
1964 USMC M38a1
'51 USMC M100 trailer, '54 M100 trailer, '90 M101a1 trailer
Http://wilfreeman.wordpress.com (M38a1 build blog)
http://m38a1usmc.wordpress.com (USMC M38a1 rebuild blog)
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16468
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

There are gaskets listed in the ORD 9 for both front and rear sides of the bell housing adapter plate. Yes they were for fording sealing. The jeep will do just fine without them unless you want the fording system functional.

Don't forget there are two dowel bolts to insure accurate positioning of the bell housing. Don't forget the two reinforcement angles at the bottom front side of the adapter plate and the angle that goes above them against the oil pan to block mating area.
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules. ... _album.php
User avatar
ChiGuy82
Member
Posts: 41
Joined: Sat May 02, 2009 6:00 pm

Post by ChiGuy82 »

Thanks for the tips guys! I feel funny asking but I think this is it!

http://www.jeep4x4center.com/front-engi ... 41096.html

Also, Wesk, I am in the process of getting all the different bolts for the engine. I have all 10 of the originals, with those two long dowl bolts. I am trying to get new bolts since the originals are worn down. I do have questions about these "angles" you are talking about. I will take pictures before I attach them together. Going to team training for the next few weeks, so it will be a bit.

Thanks again,
Mike
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16468
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

Sorry Mike but that gasket goes between the front engine mount plate and the front of the engine block.

The two gaskets that seal the rear bell housing adapter plate to the tranny and the REAR of the block are:

Willys # 804337 Gasket, bell housing to rear engine plate
Willys # 804379 Gasket, cylinder block to rear engine plate.

These are found on page 38 of the 1956 ORD 9 SNL G-758 parts manual.

The three angles were just discussed in an earlier post thread.

Image
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules. ... _album.php
User avatar
ChiGuy82
Member
Posts: 41
Joined: Sat May 02, 2009 6:00 pm

Post by ChiGuy82 »

Wesk,
WOW! Those angels were absolutely not on my Willys when I took her apart! I was very good at keeping all the parts I took off and I still have them in boxes!
Great, new parts to get! Thanks again! Will send pics when ready!
User avatar
Oland
Member
Posts: 15
Joined: Wed Apr 04, 2012 6:00 pm
Location: Stockholm, Sweden

Post by Oland »

I did not have the two smaller brackets on my M38, and also was not aware that they existed. Thanks to Wesk, I learned about them and was able to get them from Midwest. The longer bracket has a rubber gasket vulcanized on it, my rubber was in bad condition so I got that one from Midwest as well.

Regarding the gaskets, I cut them by hand from gasket paper. Punched the holes with hand punches (2 sizes). It was not a big job, quite fun actually and it looks OK.
Jeep M38 1952
GMC CCKW 353 1945
International M9A1 1942
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16468
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

When fabricating these two gaskets be sure to use the very VERY THIN
gasket paper. Thicker paper will result in a recurring problem with the bell housing bolts coming loose.
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules. ... _album.php
User avatar
STXM38A1
Contributor
Contributor
Posts: 140
Joined: Fri Jul 24, 2009 6:00 pm
Location: Fair Oaks Ranch, Texas

Post by STXM38A1 »

I also went and took a peek at my engine. The two smaller reinforcement brackets were missing. I doubt I would have known if not for this post. Wes, thanks for highlighting that detail.
Warren
M38A1 12/54 MD 78343

PHOTO ALBUM:
http://www.willysmjeeps.com/v2/modules. ... _album.php
User avatar
Oland
Member
Posts: 15
Joined: Wed Apr 04, 2012 6:00 pm
Location: Stockholm, Sweden

Post by Oland »

I made the gaskets out of .020 (0.5 mm) paper which was a little bit thicker than the original one.

Maybe it is better to skip these two gaskets to avoid the bell housing problem? I don't have any intention to ford with the jeep right now.
Jeep M38 1952
GMC CCKW 353 1945
International M9A1 1942
Post Reply