Questions & Answers
Questions: Does the tank need, or do you recommend, any treatment/sealer before filling it with fuel for the first time.
Question By: Gerry on Jun 11 2020 2:32 PM
We always just make sure to use non ethanol fuel and that nothing has gotten into the tank during shipment
Answer By: Willys Jeep Parts Tech on Jun 11 2020 10:14 AM
Questions: I bought replacement tank for 46 2-A .. had a friend install , fuel line works great but went to fill and drain plug wasn’t installed what part number or boot fits drain properly It seems to be a strange size ?
Question By: Shane on Mar 2 2020 9:36 PM
They take the original drain plug size. I do believe it was originally a 1/4" pipe thread but will need to confirm.
Answer By: Willys Jeep Parts Tech on Mar 3 2020 8:10 AM
Questions: why is the military version for my 1951 M38 so much higher price?
Question By: Patrick Renwick on Oct 31 2018 1:10 PM
649759 is the part number. They are a limited run tank but in stock.
Answer By: Willys Jeep Parts Tech on Oct 31 2018 11:12 AM
Questions: Is this tank the large mouth filler neck or small?
Question By: Tim Jones on Sep 11 2018 1:58 PM
That really is more for military tanks. The CJ's used gas cap part number: 908593 or 640594 depending if you want black or chrome.
Answer By: Willys Jeep Parts Tech on Sep 11 2018 10:02 AM
Questions: what gas cap do i use on this gas tank #640685
Question By: mitch on Jun 24 2018 6:21 PM
Here is a black cap option - #640594 and the chrome cap option - #908593. Either will work. Thanks
Answer By: Willys Jeep Parts Tech on Jun 25 2018 5:13 AM
Questions: I need to plug the fuel line connector because I'm hooking up a rubber fuel line to where the original drain plug is now. What size and type of bolt do I need to plug the fuel line hole?
Question By: Mickey Monaghan on Mar 15 2018 4:03 PM
It takes a 1/4" fuel line - so your local Napa should be able to cross a plug size.
Answer By: Willys Jeep Parts Tech on Mar 15 2018 9:42 AM
Questions: Is the fuel neck welded to the tank?
Question By: Dennis on Nov 28 2017 10:08 PM
Yes, see images above of item. It is attached.
Answer By: Willys Jeep Parts Tech on Nov 29 2017 5:53 AM
Questions: Is your tank pre coated inside the tank with a rust inhibitor paint.
Question By: Andy Wilborn on Oct 31 2017 3:44 AM
No none are, but its not necessary. Just use non-ethanol fuel and it wont rust.
Answer By: Willys Jeep Parts Tech on Oct 31 2017 5:42 AM
Questions: Hello,I know I missed up on gas tank you sent me that was wrong,I tried to use it . I need one for 1956 cj2a,,spout on angle in back of tank. Need price. Thanks Ron B.
Question By: Ron brownell on Aug 5 2017 1:25 AM
They didnt make a CJ-2A in 1956. Please call us toll free and we can help you ID the Willys Jeep you are working on.
Answer By: Willys Jeep Parts Tech on Aug 7 2017 5:55 AM
Questions: I need this tank for my 48 CJ-2A, What fuel line kit will fit it?
Question By: Jeremy McFarlane on Jun 20 2017 4:27 PM
Answer By: Willys Jeep Parts Tech on Jun 20 2017 9:39 AM
Questions: i have a 1951 m-38 and need a fuel tank will item #640685 be a suitable fit replacement for my fuel tank.or does item # 649759 the only direct fit item for my jeep.another question is why does the price jump well over 400 dollars for this item?
Question By: Scott h Chaney on Jun 18 2017 5:00 PM
The military ones are a lot more from the manufacture. The 640685 will work but you will have a gap around the quarter panel where it goes thru the body to fill up.
Answer By: Willys Jeep Parts Tech on Jun 19 2017 5:49 AM
Questions: Is this tank already painted in black?
Question By: Emiro on Jun 12 2017 7:51 PM
We get them in from the manufacture both black and grey depending on the run.
Answer By: Willys Jeep Parts Tech on Jun 12 2017 1:07 PM
Questions: How thick is the metal on these tanks?
Question By: Rowell Guevarra on Jun 7 2017 10:25 AM
I don't have the gauge spec but they are to OEM thickness.
Answer By: Willys Jeep Parts Tech on Jun 7 2017 6:15 AM
Questions: Just received a gas tank for 48 cj2a. My fuel line doesn't fit new tank. What is the size on new tank so I can find new fitting.
Question By: Richard upmeyer on May 15 2017 8:28 PM
You must have an unoriginal fuel line in your vehicle. These tanks take the original 1/4" fuel line.
Answer By: Willys Jeep Parts Tech on May 15 2017 1:45 PM
Questions: Which fuel pickup / sending unit works with this tank.
Question By: Toby Fuller on Feb 27 2017 9:39 PM
Answer By: Willys Jeep Parts Tech on Feb 27 2017 1:48 PM
Questions: I just received my replacement Fuel Tank #640685 from your company for my 1947 CJ-2A Jeep. Prior to installing it should I apply a rubberized protectant or tar to the bottom of the tank? It sits under the front seat of the Jeep.
Question By: Mark on Jan 11 2017 11:13 PM
Use part number: B10331 insulator kit.
Answer By: Willys Jeep Parts Tech on Jan 12 2017 6:02 AM
Questions: I have a 46 Willys Jeep. Original tank dimensions are 25x19x8 deep. Which replacement gas tank is correct to purchase?
Question By: Glen Dowell on Oct 25 2016 12:42 AM
If it is a 46 Jeep then it has to be a CJ-2A. Please call us toll free and we can ID your vehicle and get you the proper tank for sure.
Answer By: Willys Jeep Parts Tech on Oct 25 2016 6:08 AM
Questions: What is the tank dimensions and fuel capacity. I have cavity dimensions in the rear of the jeep of 25 1/2 in. long side to side X 15 in. front to back and 10 In. high. I believe it is a 1950 CJ-3A Willys. What tank can I use to fit?
Question By: Jim on Aug 26 2016 6:07 PM
This would be the proper tank and they originally mounted under the drivers seat. Please call us toll free. We can see what someone has done in your Willys.
Answer By: Willys Jeep Parts Tech on Aug 29 2016 5:45 AM
Questions: I have a 1960 willys jeep. I have a fuel order smell.. i need a gas tank , with sending unit which one do I get from you all.. part number please. thank you
Question By: martin martinez on Jun 11 2016 7:30 PM
640694 is the sending unit you need.
Answer By: Willys Jeep Parts Tech on Jun 13 2016 5:58 AM
Questions: will sending unit come with tank and pick up tube
Question By: randall on May 29 2015 12:00 AM
They are a bottom drain like original and the sending unit is part number: 640694.
Answer By: Willys Tech on Jun 1 2015 12:00 AM
Questions: I have a1948 Kaiser 4 dr. car do you guys have a fuel tank that fit a car?
Question By: ron on May 17 2015 12:00 AM
If its a Kaiser passenger car you will have to fabricate that tank.
Answer By: Willys Tech on May 18 2015 12:00 AM
Questions: I have just ordered a replacement tank for my '47 Willys. I live in Las Vegas, which gets quite hot in the summer. Do you recommend insulation placed around the tank? Is such a product available?
Question By: Adrian on Mar 20 2015 12:00 AM
B10331 is the part number you need.
Answer By: Willys Tech on Mar 23 2015 12:00 AM
Questions: What size fitting is the fuel line outlet on the bottom, i.e. 1/8 NTF, -4 AN, etc. In other words, what fitting do I need to attach a fuel line?
Question By: Jeff Newman on Jan 10 2015 12:00 AM
They take a 1/4 fuel line like original.
Answer By: Willys Tech on Jan 12 2015 12:00 AM
Questions: Shouldn't the tank have a vent if a vented gas cap isn't available?
Question By: Anonymous on Aug 29 2014 12:00 AM
They never had one on the tank originally. Part number: 640594 is vented.
Answer By: Willys Tech on Aug 29 2014 12:00 AM
Questions: hi there. i have a 1948 willys cj2A model jeep. i would like to get a fuel tank that would go under the body and not under the seat. what do you recommend?
Question By: gagan on Aug 28 2014 12:00 AM
There really is nothing that will fit under the body due to clearance. This is the way to go above.
Answer By: Willys Tech on Aug 29 2014 12:00 AM
Questions: i have a 1963 willys I need a fuel tank,. Which one is it? I don't know which version my jeep is could you let me know. thanks
Question By: dj on Jun 24 2014 12:00 AM
Depends if you have a CJ-3B or a CJ-5. If you have a CJ-3B then this is the one if you have a CJ-5 its a 912008.
Answer By: Willys Tech on Jun 25 2014 12:00 AM
Questions: I have a 1946 CJ2A...wanting to extend the fuel capacity and add an under seat tank to the passenger side...will this tank work bu just swapping it around??...I understand about the fill neck location issue..just wondering about the contour of the tank...(and also will remove the storage area under this seat for that tank)...
Question By: jeff on Jun 14 2014 12:00 AM
If you willing to cut and redo the filler nect then I suppose it could work.
Answer By: Willys Tech on Jun 16 2014 12:00 AM
Questions: how do you get the tank out because I cant get it
Question By: logan on Jul 14 2013 12:00 AM
You just need to remove the drivers side seat frame.
Answer By: Willys Tech on Jul 15 2013 12:00 AM
Questions: Have tank from you #640685. What gas cap # fits this tank. Thanks
Question By: Anonymous on May 14 2013 12:00 AM
908593 or 640594
Answer By: Willys Tech on May 14 2013 12:00 AM
Questions: I have a '42 willys jeep that has the large tank. I am fixing it up for fun with my grandsons but am not willing to spend nearly $500 dollars for the original size tank when I can get the smaller tank for less than $200.00. If I put a rubber filler hose on one of your smaller tanks and modify the side of the jeep for a filler cap will it be in the way of the seat? Thanks, Jim (have ordered items from you before)
Question By: Jim Hutchens on Mar 23 2013 12:00 AM
It will take some modification to fit a CJ-2A/3A/3B tank in a MB. You will will need to get part number: 663505 as well.
Answer By: Willys Tech on Mar 25 2013 12:00 AM
Questions: Can you use a aftermarket sending unit on this tank?
Question By: Anonymous on Feb 23 2013 12:00 AM
Im sure you could. We sell the proper one part number: 640694
Answer By: Willys Tech on Feb 25 2013 12:00 AM
Questions: Do they make a locking cap for this tank?
Question By: Anonymous on Feb 18 2013 12:00 AM
No, locking caps are not available.
Answer By: Willys Tech on Feb 19 2013 12:00 AM
Questions: My current tank looks rusty on the inside, but on the outside everything looks OK. Will I need to buy any other parts or accessories to install this tank?
Question By: Anonymous on Dec 18 2012 12:00 AM
You probably want a sending unit. But really if your tank is rusty on the inside you need a new tank.
Answer By: Willys Tech on Dec 18 2012 12:00 AM
Questions: Do these tanks come painted? In the picture it looks like bare steel...
Question By: Denver on Dec 18 2012 12:00 AM
Yes, they are primered and painted.
Answer By: Willys Tech on Dec 18 2012 12:00 AM
Questions: I'm ordering this tank for my (47)cj-2a,Which as No Tank right now. It also as NO piping for the tank. (i.e. From the fill spot down) (What ever you call it?) How/what do i do to get that too ?
Question By: Anonymous on Oct 31 2012 12:00 AM
The fuel line set is part number: MS01200
Answer By: Willys Tech on Nov 4 2012 12:00 AM
Questions: The tank i just pulled out of my 53 CJ3B has 6 holes on the sending unit. Will this tank work in that jeep?
Question By: David Heim on Oct 4 2012 12:00 AM
Yes this will be the one for you. In that year you should have a 5 hole.
Answer By: Willys Tech on Oct 4 2012 12:00 AM
Questions: Does the tank come with the plug and the fuel line connector?
Question By: John on Jul 2 2012 12:00 AM
Yes the plug will be in there and it is ready for your fuel line to screw into.
Answer By: Willys Tech on Jul 3 2012 12:00 AM
Questions: What is the dimensions of the Tank?
Question By: Andre on May 27 2012 12:00 AM
These are to exact original equipment measurments.
Answer By: Willys Tech on May 29 2012 12:00 AM
Questions: how many gallons of fuel does it hold?
Question By: ronda on Mar 5 2012 12:00 AM
I believe 10.5 just like original.
Answer By: Willys Tech on Mar 6 2012 12:00 AM
Questions: Is this tank already sealed inside?
Question By: Eric on Jan 7 2012 12:00 AM
These are pressure tested at the manufacter.
Answer By: Willys Tech on Jan 9 2012 12:00 AM
Questions: can you give me the dimentions of this tank please? my 48 2a has after market seats and I need to make sure i have the room. thank you
Question By: David on Dec 5 2011 12:00 AM
They are just like original. Approx: 25 x 18-3/4 x 8-1/4
Answer By: Willys Tech on Dec 5 2011 12:00 AM
Questions: I have a 1954 was there more than one model that year?
Question By: Matthew on Oct 9 2011 12:00 AM
In 1954 There was only the CJ-3B if you had a civilian Jeep.
Answer By: Willys Tech on Oct 9 2011 12:00 AM
Questions: I need a gas tank for a 41 GPW. do you have them ?
Question By: jeff on Oct 2 2011 12:00 AM
You want to order part number: A1221 for your GPW.
Answer By: Willys Tech on Oct 3 2011 12:00 AM
Questions: will this tank fit my 1951 willys m38
Question By: jack on Sep 19 2011 12:00 AM
No you want part number: 649759
Answer By: Willys Tech on Sep 20 2011 12:00 AM
Questions: Does the Fuel tank Stock Number 640685 comes with the fuel tank sending unit?
Question By: John on Sep 10 2011 12:00 AM
No the sending unit is separate.
Answer By: Willys Tech on Sep 12 2011 12:00 AM
Questions: My '52 is missing the fuel tank. Does this have everything I need, or do I need to order other parts with this tank?
Question By: Michael Kusnierek on Aug 12 2011 12:00 AM
This is for the tank only. We also have the sending unit gas cap strap grommet ect ect...
Answer By: Willys Tech on Aug 15 2011 12:00 AM
Questions: I HAVE 1951 CJ3A ,can you tow the jeep without disconnecting the drive lines?Whats the best way to tow?
Question By: ramrod on Jun 28 2011 12:00 AM
I always recommend disconnecting if possible.
Answer By: Willys Tech on Jun 29 2011 12:00 AM
Questions: Is this a bottom fuel connection?
Question By: Terry on May 6 2011 12:00 AM
Yes it is a bottom fuel line pickup. Just like original.
Answer By: Willys Tech on May 6 2011 12:00 AM
Questions: what is the gal. compasity of this tank?
Question By: scott on Apr 26 2011 12:00 AM
They are 10.5 gallons just like original.
Answer By: Willys Tech on Apr 26 2011 12:00 AM
Questions: will this fit a 1951 m38?
Question By: rich on Apr 22 2011 12:00 AM
It is part number: 649759
Answer By: Willys Tech on Apr 22 2011 12:00 AM
Questions: I have a 46 Willy's Jeep but I'm not sure how to determine what model it is.
Question By: Mick on Dec 1 2010 12:00 AM
They are just machine screws and can be picked up anywhere locally, even a Home Depot or Lowe's will have them.
Answer By: Willys Tech on Dec 9 2010 12:00 AM
Questions: This tank looks like it will fit my m38 1954, will it???
Question By: Bob Johnston on Nov 23 2010 12:00 AM
No but the proper tank is part number: 649759
Answer By: Willys Tech on Nov 23 2010 12:00 AM
Questions: Would like a passenger tank but it is unclear in your description if you also have the passenger tank. Please advise and thank you in advance :)
Question By: Tiffany on May 9 2016 4:01 AM
Sorry, nobody makes a passenger side tank for the Willys Jeep that is proper.
Answer By: WIlly Tech on May 9 2016 5:53 AM