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Wanted M38A1 metal handled Shovel
Letter size
M170 versus M38A1 Wiring
(Sold) 1951 M38 for sale (Colorado)
WANTED: M38A1 PARKING BRAKE ASSEMBLY
M38 Voltage Regulator
M38A1 Emergency brake rattle fix
M38 Gauges
Carburetor alterations for High Altitude.
New Gas Tank

Willys M Jeeps Forums


willysmjeeps.com :: View topic - Fuel tank-type?
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Fuel tank-type?

 
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bighead
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Joined: Sep 22, 2021
Posts: 46
Location: Czech Republic, Europe

PostPosted: Sat Oct 02, 2021 10:15 am    Post subject: Fuel tank-type? Reply with quote

Please determine the type of my tank is it from CJ2A?Thanks.




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<div>Václav S.
</div><div>1951 M38
1967
</div><div>DKW-Munga F91/4</div>


Last edited by bighead on Tue Oct 05, 2021 3:33 am; edited 1 time in total
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RonD2
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Joined: Oct 02, 2014
Posts: 1300
Location: South Carolina, Dorchester County

PostPosted: Sat Oct 02, 2021 11:04 am    Post subject: Reply with quote

Please give us a photo of the filler cap and neck where it comes out of the body.
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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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bighead
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Joined: Sep 22, 2021
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PostPosted: Sat Oct 02, 2021 1:31 pm    Post subject: Reply with quote

Yes, I'll take a picture, thank you for now Smile
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<div>Václav S.
</div><div>1951 M38
1967
</div><div>DKW-Munga F91/4</div>


Last edited by bighead on Tue Oct 05, 2021 3:33 am; edited 1 time in total
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4x4M38
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Joined: May 30, 2014
Posts: 3235
Location: Texas Hill Country

PostPosted: Sun Oct 03, 2021 7:40 am    Post subject: Reply with quote

Simpler question. How many large holes are in the top?

One for the sender?

Or?

One for the sender and
One for the fuel pickup/filter?

The civilian tanks fuel outlet is out the bottom, so the only large hole in the top is for the fuel gauge sender, shown in your photo.

Military tanks had that fitting in the bottom also, but only used to drain the tank.
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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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bighead
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Joined: Sep 22, 2021
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Location: Czech Republic, Europe

PostPosted: Sun Oct 03, 2021 10:28 am    Post subject: Reply with quote

For RonD2-More photos of the tank are in my gallery under numbers 30-32
For 4x4 M38-Yes, there is only a hole for a fuel gauge at the top, so it is probably a tank for civilian type-CJ2A?
_________________
<div>Václav S.
</div><div>1951 M38
1967
</div><div>DKW-Munga F91/4</div>


Last edited by bighead on Tue Oct 05, 2021 3:46 am; edited 2 times in total
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4x4M38
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PostPosted: Mon Oct 04, 2021 10:51 am    Post subject: Reply with quote

Yes civilian tank. Maybe even a CJ3A also.
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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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RonD2
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Location: South Carolina, Dorchester County

PostPosted: Fri Oct 08, 2021 1:56 pm    Post subject: Reply with quote

Photo shows a large military size fuel filler neck, same as M38. Not the same filler neck on any CJ that I'm aware of. Hard to say what tank you have there. Part M38 maybe, part something else definitely.
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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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4x4M38
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Joined: May 30, 2014
Posts: 3235
Location: Texas Hill Country

PostPosted: Fri Oct 08, 2021 5:10 pm    Post subject: Reply with quote

Something else. It looks like the neck sticks out too far for an M38 tank.
Maybe my eyes, but difficult to see what’s going on from the outside of the neck to where it attaches to the tank.

Any tank that isn’t rusty and doesn’t leak is better than one that is rusted and leaks, imho.

But it sure feels like someone modified or replaced the neck with a military style.

Did not find that cap in Dr. Ryan’s book either.
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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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RonD2
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PostPosted: Fri Oct 08, 2021 5:35 pm    Post subject: Reply with quote

I agree Brian. And he also said the tank only has the fuel filter-pickup hole fitting on top (missing the vent hole fitting), which means he should probably be using a vented gas cap or risk vapor lock. His cap is marked non-vented. Sounds like the jeep is running, so maybe there's another vent way we don't see.
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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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bighead
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Joined: Sep 22, 2021
Posts: 46
Location: Czech Republic, Europe

PostPosted: Sat Oct 09, 2021 3:09 am    Post subject: Reply with quote

Yes, the tank is beautifully clean inside, that's the main thing.
Yes, the Jeep is mobile.
Do you think that the tank with the neck is subsequently welded?





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<div>Václav S.
</div><div>1951 M38
1967
</div><div>DKW-Munga F91/4</div>
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bighead
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PostPosted: Wed Oct 20, 2021 9:46 am    Post subject: Reply with quote

How come my Jeep is running when I have a cap on the tank that seals and is NON VENTED and there is no other vent on my tank, is there just a fuel gauge?!
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<div>Václav S.
</div><div>1951 M38
1967
</div><div>DKW-Munga F91/4</div>
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wesk
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Posts: 15626
Location: Wisconsin

PostPosted: Wed Oct 20, 2021 11:27 am    Post subject: Reply with quote

Your tank is sucking air in someplace or the engine would not run long. I suggest a faulty non-vented cap or a loose fastener on something on the top of the tank. You did not offer the best view of your tank so we are limited in how well we can help you with your questions. Had you at least removed the driver's seat so we could get a good view of the entire top of the tank.

This is the type view of the tank we need to offer any real help.
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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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bighead
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Joined: Sep 22, 2021
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Location: Czech Republic, Europe

PostPosted: Thu Oct 21, 2021 5:25 am    Post subject: Reply with quote

If it was ventilating, it would be felt, but it is not. At the top there is only a fuel gauge and the outlet is only from the bottom directly to the pump.
When it's time to take off my seat and take a picture of the tank
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<div>Václav S.
</div><div>1951 M38
1967
</div><div>DKW-Munga F91/4</div>
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wesk
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PostPosted: Thu Oct 21, 2021 9:54 am    Post subject: Reply with quote

The venting of the tank during operation of the engine cannot be felt or heard. It is an extremely subtle activity. The only clues you will receive if the tank is unable to vent is the engine will only run for a few minutes then quit due to fuel starvation. To establish if this is in fact the problem causing your engine to quit you simply remove the gas cap and start the engine again and if it does not quit while operating without the cap in a few minutes your tank is not venting. On the other hand the only clues that you will receive if your tank is venting is that the engine will not quit a few minutes after starting it or in the case of vent leaks not installed by the factory you may notice fuel leaking from these air leaks.
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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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bighead
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Joined: Sep 22, 2021
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Location: Czech Republic, Europe

PostPosted: Thu Oct 21, 2021 10:45 am    Post subject: Reply with quote

My Jeep is running all the time.
My Ford Mutt had a lot of fuel to smell from the tank cap, my Jeep also has a wide throat and there's no fuel odor, so the cap seals.
There is also no fuel leakage elsewhere. Smile
_________________
<div>Václav S.
</div><div>1951 M38
1967
</div><div>DKW-Munga F91/4</div>
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