hupp

1979 928, 5-spd:

My fuel door will not close completey when proper seal and gas cap are installed. The tank was replaced by the PO and my question is this: Should the tab (on the filler neck) be installed behind the bracket (under the fender well)? Currently, the filler neck tab is fastened to the front of the bracket.

Gregg K

Don't know what is meant by "TAB". With a straight edge over the gas cap body opening, I see about a 1/4" clearance from the door to the cap.
You might look at whether there's anything keeping the cap from screwing in all the way. Mine was doing that because someone had an aftermarket unleaded/antisiphon insert in the filler neck. That's about all I can do for you.

Randy V

I have a similar problem on my '79 if the cap is not properly threaded onto the opening. If not properly seated, the cap will not screw all the way onto the opening.

Try wiggling the cap as you set it on the opening, then slowly tighten - a bit of lubricant on the cap threads may help as well.

Chuck Schreiber

Hupp,

My 79 does the same thing. It's usually due to the gascap being in a certain position. I turn mine about a quarter of a turn (the cap has 2 areas to help you turn it) and shove the gas flap straight up. It usually closes flush after that.

Hey Randy, never saw a pic of your new wheels, why don't you post them, I'd like to check them out!

ew928

My gas flap only closes when the
gas cap turning ridge is in the
vertical position. If the ridge is
pointing forwards, it will keep the gas
cap from closing all the way.

Took me a while to figure that out.
Wish all 928 mysteries were that easy.
Ernest (NYC)
88 S4 5-speed

Dennis Wilson

The tank was probably positioned too close to the passenger side when installed by the PO. You can check this by opening the cover for the fuel sending unit in the hatch floor. If the sending unit is not centered, try loosening the tank mounting straps and GENTLY moving it to the left. It helps if the tank is empty before trying this.

Dennis

hupp

Thanks for all of the suggestions guys, but all was previously attempted with no success. Proper gas cap, threads all the way down, "optimized" the position of the cap before closing fuel door, etc. I had come to the conclusion that my tank is mounted to close to the passenger side and have attempted to move tank while straps are loose - no movement. I removed the rubber boot that surrounds the filler neck and attaches to the fender well. This exposed the bracket to which the filler neck is fastened via a hex head. Basically, a bracket (which I previously called a tab) is mounted to the filler neck and another bracket is mounted under the rear quarter, the two overlap and the hex fastens the two together. When looking from outside the fuel door into the fender, the filler neck bracket is on top; therefore, it is not possible to shift the tank toward the driver's side. I'm assuming the filler neck bracket should have been placed behind the quarter bracket before fastened together.

Randy V

Depending on how much the cap is protruding, you could try shaving the top of the cap down with a rotary tool to get the clearance you need.

If we ever get some sunny weather here on the coast I'll take a few pics and post 'em Chuck.

Jim bailey - 928 International

The 78-79 were originally fitted with metal gas caps BUT superceded by the plastic caps about 1980 which helps explain the part # 928 201 903 02 ...the 02 being a revised part replacing 00 and 01 . The mounting tab has a captive nut on the back side the tank tab must be on the outside . However the metal tab welded to the body bends easily . Loosen the bolt a few turns and using a punch and hammer tap on the bolt head ..that should move the metal tab in and give you more clearance to readjust the tank and push the fill spout in toward the chassis .

OahuJames

Hupp, When I read your post, I had to check to make sure I hadn't written it. My '79s fuel door is slightly ajar as well. Like you, the PO had the whole tank replaced. When I bought the car, he told me I should take it back to the shop that did the work and have them fix it. I went back. They came up with other "more important" and expensive things to do first. Gave me a bad vibe about the place. The PO took the car in saying he smelled gas ... $1,500 dollars later he has a new gas tank and a fuel door that doesn't close.

I think I will try to shave down the cap a bit. It REALLY bugs me to see how the door being opened a bit messes up the lines of the car. Plus, it makes it look like was in an accident.

It is interesting to see how many other '79s have the same issue.

Good luck,
James

hupp

James,

The tank was replaced because the original tank was cracked and leaking. Shaving the cap down was suggested to me; however, the key hole is metallic. I'm going to give Jim's suggestion a try, in fact, I was very close to bending the bracket this weekend -- got frustrated and impatient, so why not bend something. I decided it would be better to take a break and write you all to see what other options are possible. I don't feel so bad about bending the bracket anymore.

Speaking of issues -- I feel as if most of my time thus far has been consumed with reversing bad decisions made by the PO. I can't wait to get to the stuff I want to accomplish.