©By: John T. Blair (WA4OHZ)
Last update: Dec. 27, 2000
I've had several people as me about removing the gas tank. Unfortunately, when I restored my 4/4 it was about the last thing removed, so I really didn't know if or how to do it without completely disassembling the car.
When I restored her, I did have the tank cleaned, but over the years as a show car, the rust and crud really started building up in the tank. It got so bad, that evey season before we could take the car out, we had to drain the tank, the fuel pump, the float bowl, and blow out the lines. A real pain. After the last show this year, my dad and I decided we'd had enough. The tank was coming out, getting cleaned and lined. The problem was how to do the job.
With the help of the fellows on the Morgan mailing list, I got most of the of the answers I needed. I is doable without removing the rear deck or pulling the body. It has to come out from under the car! The following is the procedure to do it. Unfortunately, I didn't have a digital camera at the time, so I don't have any pictures. (Note: If anyone uses these notes and pulls the tank, if you could please take some pictures, for insertion in this article, I'd really appreciate it.)
These carriage bolts can be a real pain - especially if the wood base has rotted. If the carriage bolts turn in the wood, you will have to cut the nuts and bolts off with a die grinder or a hack saw. Then you can use a drift to push the bolts up through the wood. The rear bolts are the hardest to deal with as they sit right under the back of the rear leaf springs. So getting them out can be a real challenge.
The tank is relatively light, so when I got it off it's mounting deck, I set it on my chest. Then I moved around and set it on a piece of cardboard to slide it out from under the car.
Hope this helps and enjoy your Morgan!
John
P.S.
A couple of comments about leaking gas tanks.
Phil Roettjer, owns a 1967 +4 and has had problems with his gas tank:
I have the gas tank out of my +4 since it was also leaking. What I discovered is there are stress points at the bottom where the sides of the tank are soldered on. There are two bolt holes on the flanges on each side and the side-to-side motion of the car plus vibrations puts tremendous stress on these solder joints. So any padding that would allow the stress to be transferred away from these joints should be beneficial. The leaking problem in my car is not due to corrosion, but due to breaking the solder joints at these stress points. So I do plan to have some sort of rubber or padding at the bolting points to help relieve the stress. I would also recommend sealing the inside of the tank with a compound such as the POR15 tank sealer.
Greg Solow of the "Engine Room" writes:
I have had my car since 1965 when I purchased it new. The only problem I have had with my gas tank , and I have seen the same problem in many other cars, was that the two baffles which run fore and aft dividing the tank roughly in thirds, came unsoldered from the inside of the tank and fell to the bottom where they would slide around and sometimes interfere with the correct functioning of the fuel gauge. To repair this, I ultimately drilled 8 holes through the sides of the tank so that the baffles could be pop riveted into place securely. Then the steel pop rivets were silver soldered over to plug the holes . There have been no problems since. I believe that the original mounting, solidly on good wood boards is an excellent solution. The leaks are caused by either the boards coming adrift from the chassis, or the tank itself coming loose from the beards and moving around then stressing the soldered joints. The two wooden boards are fastened together by two metal straps that are screwed into the wood. Then the boards are fastened to the fuel tank by four bolts that pass through the mounting brackets that are soldered to the ends of the tank. Then this whole rigid assembly is attached to the frame by three screws only. There is a good reason for that. Three points determine a plane. With the board platform attached in this manner, the boards and the tank form one unit that is insulated form any flexing of the frame, i.e.. the frame can move around but the tank will not be "bent" or twisted.
My recommendation is to do a good solder job on the tank. Secure the baffles if they have come loose. (You can see them with a mirror and a light through the sending unit hole). If the tank is not rusty inside DON'T seal it. I believe that "sealing" is to stop or prevent rust, not stop leaks. Make sure that the support boards are in good shape, especially at the forward corners where the two front bolts that go through the chassis are located. Tighten everything up and keep it tight and you should have no problems.
We have found that most of the engineering that went into Morgans was and is quite good. Most things do not need to be reengineered! The areas where things can really be improved are in the fit and finish and sometimes in the materials used. Morgans were "Built to a price" during the sixties, remember a new +4 cost more that an MG-B, but less than an Austin Healey 3000. The way Morgan kept the price down was by using the least expensive materials that would do the job, and I don't necessarily think that there was any thought of the cars being on the road 30 years later. After all, by 1964, when I first visited the factory, the 3 wheeler was really an orphan, as far as Morgan was concerned, and the last one produced was only 11 years old then.
Regards,
Greg Solow
Bob Nogueira also writes:
I know of what you speak (Leaking gas tanks). The Duchess tank leaked at the same joint. It took me forever to discover the leak as it was so small that fuel never dripped to the ground but collected between the tank and wood boards. After repairing the tank, to keep from stressing the seams again I used two metal straps with rubber under them. They start and end at the rear cross member, going over the tank down to the boards and under the boards back to the rear cross member. On top of the tank I have two adjustment screws to tighten up the straps. With this arrangement I don't have to use side flange. I also feel much more secure knowing my gas tank is not being held in place by two soldered flanges.
Bob Nogueira
To email me with comments or questions.