M38 fuel linkage help

Discussion topics on Willys Overland M series vehicles
Post Reply
User avatar
vrod02
Member
Posts: 30
Joined: Thu Jan 27, 2011 6:00 pm
Location: st. louis Mo.

M38 fuel linkage help

Post by vrod02 »

Short story is this.
Bubba installed a f-head.
I installed 2a lhead.
I have no linkage from pedal to carb as well as no vacuum lines.
I have the correct ys installed, correct fuel pump is on the way, oil bath breather is painted and ready to install.

I have searched for a exploded view pic with parts with no luck.
Somebody kick me in the right direction please! :)

heres some pics
Thanks in advance Barry

Image

Image

Is this part right?

Image
User avatar
evanso1975
Jeep Enthusiast
Jeep Enthusiast
Posts: 615
Joined: Sun May 09, 2010 6:00 pm
Location: North Yorkshire, UK

Post by evanso1975 »

Check out page 65 of the G740 ORD-9, available to download here (5th link down):

http://www.willysmjeeps.com/v2/modules. ... oad&cid=39

This may help with the vent lines (late M38 is about half way down the page, early M38 is to the bottom):

http://www.cj3a.info/sibling/m38vent/vent.htm

Gas pedal linkage is very similar to the MB/GPW jeeps. You can probably just make out the M38 linkage here:
Image
Hope Wes doesn't mind me raiding his photo album! :D

And here's a good photo of an MB/GPW linkage:

http://www.g503.com/forums/viewtopic.php?f=4&t=55336

Btw, do you have a copy of Ryan Miller's M38 reference guide? If not, I suggest you get one; it's worth it's weight in gold!
Owen

1951 US Air Force M38
1944 F-1 1/2-ton Airdrome Trailer
1940 C15 Chevrolet CMP 11-cab
1939 DKW KS200 Motorcycle
MVT # 19406
User avatar
vrod02
Member
Posts: 30
Joined: Thu Jan 27, 2011 6:00 pm
Location: st. louis Mo.

Post by vrod02 »

Thank you sir Evan!
User avatar
SledDog
Contributor
Contributor
Posts: 91
Joined: Sat Aug 13, 2011 6:00 pm
Location: Litchfield Park Arizona

Post by SledDog »

Sorry to barge in but I keep hearing about Ryan's M38 reference book. Who currently sells the book?
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16468
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

Take a peek at my photo album M38 fuel system page:
http://www.willysmjeeps.com/v2/modules. ... php&page=2

Image

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
vrod02
Member
Posts: 30
Joined: Thu Jan 27, 2011 6:00 pm
Location: st. louis Mo.

Post by vrod02 »

Well that just got simplifed!
Thank you Wesk!
The oil line your speaking of lubes the timing chain?
Can I rob the foot pedal linkage that bolts to the engine off a parts jeep 2a?
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16468
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

It should work. I believe the only real difference is the rod at the pedal due to the M38 pedal to rod connection.

That oil line is normally the pressure line to the oil filter. You shouldn't run it without the filter. Also it should be at least a 2 ply fabric layered line with a separate liner skin. Saving a dime there can cost you dearly on the road both in money and labor to remove the pump to deal with the barb and hose fitting. A healthy engine in cold weather on startup can throw 80 PSI at that hose no matter where the end of it goes. Is that a timing chain 638632 engine or a timing gear 641087 engine?
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
vrod02
Member
Posts: 30
Joined: Thu Jan 27, 2011 6:00 pm
Location: st. louis Mo.

Post by vrod02 »

I believe timing gear. I had the motor overhauled and cover was installed . This picture shows front of motor where the oil line in ? was run to.

Image

Image
User avatar
vrod02
Member
Posts: 30
Joined: Thu Jan 27, 2011 6:00 pm
Location: st. louis Mo.

Post by vrod02 »

Got it, oil line. does the exit line out of the oil filter canister go to timing gear cover? The oil filter canister I got with the 2a engine is factory orange original. correct for m38 other than color?
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16468
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

Yes the exit line from the oil filter goes to the timing cover. On the early chain drive cam engines it was helpful in lubricating the chain. On the gear drive cam engines it is not needed since there is a pressure port and nozzle at the front of the block connected to the main oil gallery that sprays at the two gears where they mesh. The timing cover on your block is the later gear drive cover.

The civvy Fram oil filter that came with your engine is not the same as the original Cuno Filter all production M38's came with. Nor is the same as the military Junior filter that often replaced the Cuno's in the field and was used on the WWII MB and the later M38A1.

Image
Here's the Cuno on a M38

Image
Here's the military junior on a MB.
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
evanso1975
Jeep Enthusiast
Jeep Enthusiast
Posts: 615
Joined: Sun May 09, 2010 6:00 pm
Location: North Yorkshire, UK

Post by evanso1975 »

Sorry to barge in but I keep hearing about Ryan's M38 reference book. Who currently sells the book?
Here's a copy on Ebay:
http://www.ebay.com/itm/M38-Willys-Jeep ... 2a162ae206

Peter DeBella has them listed on his site too:
http://www.debellajeepparts.com/m38m38a1holiday09.htm

I think a lot of the M38 jeep dealers will have a copy, or know where to get one. :wink:
Owen

1951 US Air Force M38
1944 F-1 1/2-ton Airdrome Trailer
1940 C15 Chevrolet CMP 11-cab
1939 DKW KS200 Motorcycle
MVT # 19406
User avatar
vrod02
Member
Posts: 30
Joined: Thu Jan 27, 2011 6:00 pm
Location: st. louis Mo.

Post by vrod02 »

m38 Fuel pump is in need of repair,sent off. Can I trick the ys to do its job, fuel/air mixturepluging vacuum holes? . would like to fire engine this weekend
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16468
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

Just hook a can of gas and a hose to the inlet port of the carb and hang it from the ceiling so it is a foot or two higher than the carb.
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
vrod02
Member
Posts: 30
Joined: Thu Jan 27, 2011 6:00 pm
Location: st. louis Mo.

Post by vrod02 »

Wesk right on time as usual. Thanks! what is the vacuum line on the YS's job?
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16468
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

The YS only has two tubes. Fuel supply and bowel vent. I suspect you are referring to the bowl vent that goes over to the intake crossover pipe and allows dry clean air to replace fuel in the bowl as it feeds the engine and provides for the occasional release of trapped pressure.
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
Post Reply