• 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

Gas Cap Seal

JohnnyMead

Jedi Hopeful
Country flag
Offline
The gas cap assembly on my TR3A has a very hard, brittle material that must be what's left of a seal that the cap pushes down on. I can't find it listed as a part for sale. Has anyone replaced it?
Thanks,
John
 

martx-5

Yoda
Country flag
Offline
The seal on my TR3 cap (which is new) is also a hard material. It is thin and just sits inside a recess. It appears to be some sort of fiber. In the upper part of the cap, there is a spring loaded section that is able to move axially in all directions so it can mate with the gasket you are talking about.
 

NutmegCT

Great Pumpkin
Silver
Online
John - this sure doesn't constitute an expert recommendation ... but I made my own seal by cutting some inner tube into the proper shape. Had to do some trimming, but it's worked well for 3 years.

Just my 2¢.
Tom
 

Mickey Richaud

Moderator
Staff member
Platinum
Country flag
Offline
Your local Pep Boys/Autozone/Advance/etc. all have rolls of different gasket materials. I've used the rubber/cork and the dark grey stuff that looks like roofing felt with good results. They come in varying thicknesses as well, so you should be able to find something suitable.

Mickey
 

Twosheds

Darth Vader
Offline
NutmegCT said:
John - this sure doesn't constitute an expert recommendation ... but I made my own seal by cutting some inner tube into the proper shape. Had to do some trimming, but it's worked well for 3 years.

Just my 2¢.
Tom

Tom, you may want to change that gasket to one made of a different material.

I have experimented with this.

I once made a gasket from an inner tube to use on the gascolator on our engine test stand. The gasket swelled to five times its original dimensions and fuel went everywhere!
 
OP
JohnnyMead

JohnnyMead

Jedi Hopeful
Country flag
Offline
Thanks for the suggestions.
I started to look at that seal after I sprayed a lot of water around the gas cap when I was washing a summer's worth of crud off the car. The next time I went for a drive the car started to act like it was running on water. I've tried to eliminate any other possibility.
 

NutmegCT

Great Pumpkin
Silver
Online
Twosheds said:
Tom, you may want to change that gasket to one made of a different material.

I have experimented with this.

I once made a gasket from an inner tube to use on the gascolator on our engine test stand. The gasket swelled to five times its original dimensions and fuel went everywhere!

Yikes - haven't experienced that, and sure don't want to. Thanks John for the heads-up. What material would you recommend for Johnny Mead's gas cap?

By the way, how's life in your neck of the woods?

Tom
 

bgbassplyr

Darth Vader
Offline
Go by a roofing contractors shop and ask for a scrap of 45 mill EPDM. Gasoline doesn't have any effect on it, easy to cut and shape, will last forever.
 

ekamm

Jedi Warrior
Offline
I had the same problem finding one. Mine really looks like cork so I will replace with cork gasket material. What adhesive to use?
 

Twosheds

Darth Vader
Offline
NutmegCT said:
Thanks John for the heads-up. What material would you recommend for Johnny Mead's gas cap?

By the way, how's life in your neck of the woods?

Tom

I don't know about the material compatible with gasoline, but others have answered.

They are calling for frost on the pumpkin tonight here and my furnace is kaput. I'm using the woodstove, but I'm a little nervous what with breathing this 100 per cent oxygen while messing with the fire!
 

Mickey Richaud

Moderator
Staff member
Platinum
Country flag
Offline
Wht's up with the O2, John? I must have missed something...

Mickey
 

Twosheds

Darth Vader
Offline
Mickey Richaud said:
Wht's up with the O2, John? I must have missed something...

Mickey

COPD, Mickey. I have been needing to use it for a few years now, but I'm contrary, not to say hard-headed. Last year I gave in and use it all the time now. It's a pain to deal with, but...
 

Mickey Richaud

Moderator
Staff member
Platinum
Country flag
Offline
Sorry, didn't know.

Understand completely about being contrary. But do what you gotta do...

Mickey
 

TR3driver

Great Pumpkin - R.I.P
Offline
Sorry to hear that, John.

The cap assembly doesn't seal all that tightly anyway; mine has a vent hole in the inner cap, and would leak somewhat at the stem between inner and outer anyway. Since ISTR the seal lays down in a groove, O-ring cord should work fine; or you could probably just fill the groove with RTV (letting it set firmly before closing the cap, of course).
 
Similar threads
Thread starter Title Forum Replies Date
K TR2/3/3A Gas Cap Seal Replacement Hack Triumph 0
K TR2/3/3A TR3...Gas cap rubber gasket/seal in cap lid? Triumph 1
T For Sale TR2 - TR3 Gas Cap for sale Triumph Classifieds 1
S TR2/3/3A TR3 gas filler cap Triumph 1
T TR2/3/3A TR3A Gas Cap Triumph 15
K For Sale TR3 Gas Cap Assembly Triumph Classifieds 0
Michael Oritt Gas cap parts now in tank Austin Healey 17
ckeithjordan TR2/3/3A Gas Filler Cap Triumph 1
C TR6 Gas cap venting. Triumph 2
PatGalvin TR2/3/3A TR3A Gas Cap Info and uel tank venting Triumph 4
tahoe healey flip top gas cap Austin Healey 5
6TTR3A TR6 Magnetic ring in the early gas cap Triumph 2
maxwedge5281 gas filler and cap options Austin Healey 9
K TR2/3/3A 3A Gas Cap keeps popping open? Triumph 5
mrv8q TR2/3/3A Gas Cap Q Triumph 4
M TR2/3/3A TR3A gas cap fiber washer Triumph 6
D flip top gas cap?? Spridgets 10
T TR2/3/3A TR3B gas cap Triumph 0
M_Pied_Lourd Wedge TR8 Gas Cap Triumph 34
BillD Gas Cap does fit on new tank's filler tube Spridgets 5
S Gas Cap Spridgets 1
A Gas cap fiber washer Triumph 6
M TR2/3/3A TR3 gas cap question Triumph 4
R TR5/TR250 Tr4, 4A and 250 gas cap position? Triumph 6
T Spitfire A different Spitfire gas cap question Triumph 3
A Gas filler cap Triumph 3
64Elan Source for gas cap Sunbeam (Rootes) 4
64Elan Spitfire Spitfire gas cap question Triumph 10
I TR6 What glue for TR6 magnet in gas cap? Triumph 9
S TR2/3/3A late tr3 gas cap? Triumph 5
S TR2/3/3A Tr3 gas cap vent Triumph 0
Morris Anybody have a gas cap for sale? Spridgets 5
davidb AH3000 - gas cap Austin Healey 3
A TR2/3/3A TR-3A Gas filler cap Triumph 2
V Locking gas cap for 1970+ Midget??? Spridgets 14
B Need vented gas cap? Austin Healey 9
I TR6 TR6 gas cap help Triumph 2
G TR2/3/3A TR3A Gas cap help Triumph 14
T gas filler cap Triumph 12
kyreb1862 Locking Gas Cap MG 12
A TR2/3/3A TR-3A - Locking Gas Cap??? Triumph 15
DNK Wedge TR8 Gas Cap Triumph 2
J Vent gas cap or not Spridgets 12
PATR8 Wedge TR7/8 small gas cap Triumph 29
F Gas cap gasket Triumph 1
PATR8 Wedge Looking for a Small TR7/8 Gas Cap Triumph 9
L TR4/4A 4A gas cap gasket Triumph 0
T Gas cap gasket? Triumph 10
S Gas cap Triumph 14
H TR6 TR6 Gas Cap Spring Tech Tip Triumph 4

Similar threads

Top