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willysmjeeps.com :: View topic - m38a1 transfer vent line routing ?
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m38a1 transfer vent line routing ?
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Saberr
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Joined: Aug 21, 2015
Posts: 124

PostPosted: Sat Sep 24, 2016 11:34 pm    Post subject: m38a1 transfer vent line routing ? Reply with quote

About to drop my re-built engine into chassis, and was hooking up the vent and oil lines today. I was stupid and didn't get good pics before i took engine out. Have checked through all the info i can find and tm-9-8015. I can not find where the transfer case vent line ends. I know it runs from T on top transmission up and along the block. That was all. The none handled pumps it ran to front of, but what about on the handled pumps ? Only place i can think of is the T before the pvc valve and after pump. Can't figure out if something else hooks in that T. When i got the jeep, all lines existed, but were not connected since a single action pump was installed, the lines that were there just hung.
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wesk
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Joined: Apr 04, 2005
Posts: 16225
Location: Wisconsin

PostPosted: Sun Sep 25, 2016 1:54 am    Post subject: Reply with quote

You overlooked my photo albums!!!!

http://www.willysmjeeps.com/v2/modules.php?set_albumName=album115&op=modload&name=gallery&file=index&include=view_album.php
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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.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
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Saberr
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Joined: Aug 21, 2015
Posts: 124

PostPosted: Sun Sep 25, 2016 9:53 am    Post subject: Reply with quote

Looked through your album wes, ether im blind or its just going right over my head. Only picture was once again fg 110 engine vent system. Cant tell if the vent line goes in the T fitting or not, just too general of drawing and the fuel pump is pulled away in drawing. I didn't see any real pictures with the lines ran with the handled pumps ether.
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OKCM38CDN
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Joined: Feb 17, 2012
Posts: 530
Location: Del City, OK

PostPosted: Sun Sep 25, 2016 10:06 am    Post subject: Reply with quote

Transmission vent line; if equipped went from the Transfer case to the Bell Housing (Tee used here) then over along the engine to the Fuel/Vacuum pump to a one way ball check valve. This is the same as on the M-38...

Hope that helps...
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Hal, KB1ZQ
TSGT, USAF (Ret)
1952 M-38 CDN CAR 52-31313
1952 M-100 Strick #104
1951 Willys Wagon (For Sale)
1954 Willys M38A1 201001205
Tornado Alley
Del City, OK
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Saberr
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Joined: Aug 21, 2015
Posts: 124

PostPosted: Sun Sep 25, 2016 10:26 am    Post subject: Reply with quote

ok, the check valve is a missing piece of the puzzle. Now, how does that connect to the pump ? Where is this connection ?
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4x4M38
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Joined: May 30, 2014
Posts: 3440
Location: Texas Hill Country

PostPosted: Sun Sep 25, 2016 1:13 pm    Post subject: Reply with quote

It's right in front of you! But it's not!

The photo you posted shows an "axle " vent fitting screwed into the port
where your line goes. It's actually holding the priming handle on.

Where the vent system was removed or not installed they put that vent
fitting in there.

Go look at the M38 fording ventilation information. You are looking for the
late version.

Take care,
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Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php
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4x4M38
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Joined: May 30, 2014
Posts: 3440
Location: Texas Hill Country

PostPosted: Sun Sep 25, 2016 1:26 pm    Post subject: Reply with quote

Here's the link:
http://willysmjeeps.com/downloads/cjv35u.pdf

Go to the M38 section page 2.

Once you see it you can go back to Wes' pages and see it was there all along!

That vent fitting threw you.
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Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php
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wesk
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Joined: Apr 04, 2005
Posts: 16225
Location: Wisconsin

PostPosted: Mon Sep 26, 2016 12:14 am    Post subject: Reply with quote

Quote:
Looked through your album wes, ether im blind or its just going right over my head. Only picture was once again fg 110 engine vent system.


You are definately not seeing very well.

Here's how to access the correct album:

1: Click on my main album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

2: Click on my M38A1/M170 Fuel System Album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=album115&op=modload&name=gallery&file=index&include=view_album.php

3: On page 2 of my M38A1/M170 Fuel System Album, Click on Vent & Fording System Album.

Tyhe M38 system has many similarities but it may just confuse your issues.
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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.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
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ocwd
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Joined: May 14, 2007
Posts: 721
Location: Placentia, CA

PostPosted: Wed Mar 24, 2021 8:37 am    Post subject: Vented Cap Reply with quote

I would like to install a vented cap on my fuel pump. The vented cap is shown in Wes's illustration above. Just a couple of questions.

1. Where to buy such a cap?
2. What is the thread size and pitch?

Thank you,

Dave[/list]
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wesk
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Joined: Apr 04, 2005
Posts: 16225
Location: Wisconsin

PostPosted: Wed Mar 24, 2021 8:53 am    Post subject: Reply with quote

Search our posts here. There was a member in Canada selling new ones.
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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.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
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RonD2
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Joined: Oct 02, 2014
Posts: 1889
Location: South Carolina, Dorchester County

PostPosted: Wed Mar 24, 2021 10:56 am    Post subject: Reply with quote

I could be mistaken, but thought it was the same vent used on the differential covers?

If yes, MWM has them for $6 each here: https://store.midwestmilitary.com/product-p/915564.htm
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Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51

“The only good sports car that America ever made was the Jeep."
--- Enzo Ferrari

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wesk
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Joined: Apr 04, 2005
Posts: 16225
Location: Wisconsin

PostPosted: Wed Mar 24, 2021 10:30 pm    Post subject: Reply with quote

Yes. Both are found easily in your copy of the M38A1 ORD 9 SNL G-758!

Valve, fuel pump air vent, Used after sn MD23359 ORD# 5196397 Pg 83

Valve, axle vent ORD# 5196397 Pg 219
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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.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
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ocwd
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Joined: May 14, 2007
Posts: 721
Location: Placentia, CA

PostPosted: Thu Mar 25, 2021 7:36 am    Post subject: Vented Cap Reply with quote

Thank you. Same part number so threads should match. I'll order from John. Once upon a time I hade one of these axle vent caps in my parts but I lost track of it. Oh well.
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wesk
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Posts: 16225
Location: Wisconsin

PostPosted: Thu Mar 25, 2021 10:14 am    Post subject: Reply with quote

You can probably find one just as easily at your local auto parts store in their Dorman Racks!
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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.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
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ocwd
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Joined: May 14, 2007
Posts: 721
Location: Placentia, CA

PostPosted: Thu Mar 25, 2021 6:48 pm    Post subject: Vented Cap Reply with quote

I’ll go check it out this weekend. Thanks for the tip.
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