• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

TR2/3/3A gas tank hole body work

sp53

Yoda
Country flag
Offline
So, I am working in the area of the gas tank hole and trying to get the area flattened out for putty. I cannot seem to get the area to be a low spot with my hammers and dolly; the high spot moves. The PO evidently pulled up and around as he tried to get that big bolt off the filler. Any ideas would help
 

mixdenny

Freshman Member
Country flag
Offline
You will need to shrink that spot. There are several different methods. For one small spot try heating it with your smallest torch tip and immediately quenching it with a wet rag. You may have to dolly around the spot when it is hot, then quench. You can search for shrinking and find various web sites on metal working. Dennis
 

TomMull

Luke Skywalker
Silver
Country flag
Offline
Dennis has the right idea but I would work on the dings first. Heat each one and hammer from the high side, underneath as it appears in the pictures. It might be easier to have a helper heat the peaks cherry red while you hammer from underneath. You could have your helper lay a flat dolly on top too. Use several light blows, about like putting a tack into softwood. You'll only get a few taps before the peak cools. Avoid heating the same spot more than a couple of times. Flattening the dings might help with the bulge on the other side too, and the heat/ quench method above should finish it up.
Tom
 

CJD

Yoda
Country flag
Online
As they say above, shrinking is the book answer.

If you don't have a torch, you should be able to "oil can" the high into a low, so the tank will sit flat. You'll have to back the area when you hit it to "can" it the other way.
 
OP
S

sp53

Yoda
Country flag
Offline
I probably was not clear; this area is the top where the gas cap goes. I have good access, but the problem I am having is the large hole used for the gas cap has made the area around the hole flimsy and the more I try and hammer dolly the ripple spreads. Perhaps I am expecting too much. I did have some success with the dolly and hammer, but I wanted it flat, but again the area is wavy from the weakness of the hole; it probably should have had a fold over in the hole to make it stronger. I might try skimming the area by starting back a few inches with glaze compound and feather towards and up at the cap hole. The cap should hide the slight lift in height.
The PO probably fought that nut; I have fought a couple there too.
 

PatGalvin

Jedi Warrior
Offline
The previous stresses on the area around the hole stretched the metal. The more you hit it, the worse it will get. First read the surface of the metal and estimate where it has stretched. Then you can shrink by applying heat to one small area at a time and then applying hammer and dolly while it cools. When you see the metal shrink and the flimsy oil can tighten up, you will be amazed. After you shrink a couple small areas, read the metal again. You can over shrink an area and create a new problem. Suggest you pick up a piece of 18 or 20 gauge sheet steel, create a stretch with a hammer, and practice with hammer and dolly. You can also shrink with heat and a wet rag or heat and compressed air. Bondo or glazing putty are not a substitute for the needed metal work. Especially on a flat-ish area like the gas tank hole area.
 

Brinkerhoff

Jedi Knight
Offline
Lots of good advice, shrinking is the answer. I'd start with three small spots equally spaced around the hole right at the edge. Heat / quench then wait for the metal to cool to room temp. before I'd go further.
 
Similar threads
Thread starter Title Forum Replies Date
R TR2/3/3A Pin Hole in gas tank Triumph 9
J TR2/3/3A TR3 gas tank mystery Triumph 5
Rob Glasgow New Gas Tank Austin Healey 8
B TR4/4A Gas Tank color? Triumph 4
B How to clean the old gunk out of a Spridget gas tank? Spridgets 21
JPSmit Fuel line - gas tank question Restoration & Tools 5
Ripper01 SOLD-TR6 Gas Tank Triumph Classifieds 3
A Wanted Gas tank for TR6 Triumph Classifieds 5
D What's inside the gas tank?? Spridgets 13
A TR2/3/3A Interior rear panel covering gas tank and rear seat bottom install. Triumph 7
J TR2/3/3A TR3A gas tank repair Triumph 4
Michael Oritt Gas cap parts now in tank Austin Healey 17
R TR2/3/3A Installing gas tank Triumph 6
FlyingCat Spitfire Gas tank Triumph 2
S TR2/3/3A how to install a gas tank in an early tr3 Triumph 8
D TR2/3/3A Gas tank does not fit! Triumph 4
C MGB Found this spring in my gas tank MG 8
B Stripped Thread in Gas Tank Austin Healey 26
Jim_Gruber What Now, new gas tank filler neck is about 1/2-3/4" too short Spridgets 19
S TR4/4A Worm in gas tank? Triumph 7
PatGalvin TR2/3/3A TR3A Gas Cap Info and uel tank venting Triumph 4
F Throw away BN7 Gas tank Austin Healey 3
F For Sale BN7 gas tank, original. [I think]. Austin Healey Classifieds 0
maxwedge5281 sxplash or overflow when filling healey gas tank Austin Healey 6
AngliaGT MGB Gas Tank Removal - '67 GT MG 2
69MGC MGC New Gas Tank for my C MG 3
D TR4/4A Tr4 Vented gas tank banjo bolt Triumph 7
K TR2/3/3A Cleaning the gas tank...what have I done now? Triumph 19
K TR2/3/3A Gas tank pipe connector? Triumph 6
maxwedge5281 gas tank and grill installation Austin Healey 29
K TR2/3/3A Gas tank to pipe connector.... Triumph 1
K TR2/3/3A Cleaning a gas tank with muriatic acid.... Triumph 7
C TR2/3/3A Gas tank cover in cockpit area Triumph 3
J TR2/3/3A Gas tank fitting and ferrule Triumph 2
S TR2/3/3A with sugar in the gas tank Triumph 13
Tinkerman TR2/3/3A Another Freeby from the past. For a 1960 TR3A Gas Tank Triumph 4
Gliderman8 General Tech Cleaning sludge/varnish from a gas tank Triumph 6
B TR6 76 TR6 gas separation tank - orientation? Triumph 2
C TR2/3/3A TR2 Gas Tank Triumph 6
R_Lyle TR6 Drain the fuel tank - five year old gas? Triumph 4
davidb AH 3000 aluminum gas tank Austin Healey 5
H gas tank repair 100/6 without killing myself Austin Healey 11
B Gas Tank Sending Unit Orientation Austin Healey 4
R draining old fuel from gas tank 3000 mk II Bj7 Austin Healey 3
BobbyD TR6 TR6 Custom Aluminum Gas Tank ~ 15 Gallons Triumph 1
R Gas Tank Installation Austin Healey 6
X gas tank strainer in Bugeye Spridgets 6
Scotsman Gas Tank Rust Removal Triumph 9
vette Gas tank install Austin Healey 7
C Holey gas tank MG 8

Similar threads

Top