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Fuel Tank Felt Mounting Question

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Fuel Tank Felt Mounting Question #1 This topic is about my 1967 Triumph TR4A
trguy75 James Henningsen Ocala, FL, USA Sign in to contact 1966 BSA A65S Spitfire 1967 Triumph TR4A "Charles" 1968 Triumph TR250 "Jackson" 1975 Triumph TR6 "Molly"	Topic Creator (OP) Feb 12, 2023 01:48 PM Top Contributor Joined 7 years ago 538 Posts

A question that has baffled me for quite some time. Factory parts manual shows Felt mounting strip top rear and bottom rear on the gas tank (611972 and 611973 respectively. I have not seen them installed on any gas tank over the years. My current 67 4A project of which it was never taken apart for resto until now has two felt strips that look original on the side of the tank facing the trunk so the rear panel fibre board has a cushion. Just curious if anyone figured out exctly what they are protecting. When mounted the tank sits off the bottom shelf and is cushioned by the two foam grommets on the bottom. Curious in Ocala!

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Re: Fuel Tank Felt Mounting Question #2
trguy75 James Henningsen Ocala, FL, USA Sign in to contact 1966 BSA A65S Spitfire 1967 Triumph TR4A "Charles" 1968 Triumph TR250 "Jackson" 1975 Triumph TR6 "Molly"	Topic Creator (OP) Feb 12, 2023 01:52 PM Top Contributor Joined 7 years ago 538 Posts

Also interesting. Moss Motors shows the two felt strips on the side facing the rear like mine were.

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Re: Fuel Tank Felt Mounting Question #3
auprichard Andrew Uprichard Jackson, MI, USA Sign in to contact 1956 Triumph TR3 1962 Triumph TR3B 1962 Triumph TR4 1963 Triumph TR4 & more	Feb 13, 2023 07:37 AM Top Contributor Joined 8 years ago 3,064 Posts

Jim: the TR250 and early TR6 has the same tank and felt strips, but in the 250/6 catalog they are called "anti-rattle felt strips". The picture in this catalog shows them top and bottom (unlike the 4A catalog). Go figure!

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Re: Fuel Tank Felt Mounting Question #4
RMP NC Russell Pennington Greensboro, NC - North Carolina, USA Sign in to contact 1964 Triumph TR4 1965 Plymouth Fury 1967 Triumph GT6 MkI 1970 Dodge Challenger	Feb 13, 2023 08:16 AM Joined 6 years ago 589 Posts

I imagine these strips intend to prevent the rear fuel tank panel from flexing and vibrating against the tank. I would imagine any sort of isolation padding would work there for this purpose. My car had no panel there at all when I got my car, so I am assuming.

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Re: Fuel Tank Felt Mounting Question #5
morse65tr4a Stewart Morse Arroyo Grande, CA, USA Sign in to contact 1965 Triumph TR4A	Feb 13, 2023 12:13 PM Joined 3 years ago 76 Posts

I had the same question. I guess part of the anti-rattle for the trunk panel piece as mentioned by Russell. Mine shows those two felt strips as well.

1965 tr4a irs fuel tank.jpg 52.8 KB

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Re: Fuel Tank Felt Mounting Question #6
trguy75 James Henningsen Ocala, FL, USA Sign in to contact 1966 BSA A65S Spitfire 1967 Triumph TR4A "Charles" 1968 Triumph TR250 "Jackson" 1975 Triumph TR6 "Molly"	Topic Creator (OP) Feb 13, 2023 12:23 PM Top Contributor Joined 7 years ago 538 Posts

Yea, that’s how mine were on the back of the tank. Might be an error in the orig8nal parts manual that was corrected by a service bulletin. Rimmer Bros also show it on back like in your picture. That’s where I’m putting it. Jim

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Re: Fuel Tank Felt Mounting Question #7
Sarastro Steve Maas Long Beach, CA, USA Sign in to contact 1952 MG TD 1966 Triumph TR4A	Feb 13, 2023 06:03 PM Top Contributor Joined 13 years ago 875 Posts

Yeah, they actually should be called "autorust strips." They are near-perfect water traps. The ones on the sides aren't too bad, but the ones on the bottom are responsible for a lot of rusted tanks. The Triumph factory was in love with felt, but perhaps because there was nothing else available for a decent price.

I'd suggest using anything else. You don't have to do everything the same way the factory did.

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Re: Fuel Tank Felt Mounting Question #8
jean marc normandie Jean Marc Rafanot Le Havre, normandie, France Sign in to contact	Feb 14, 2023 03:04 AM Top Contributor Joined 5 years ago 1,160 Posts

Good morning, how are you doing. I reassemble my TR6 and I think I used cork for between the bottom of the tank and the body.

What do you think about it. cork resists alcohol and water, so why not gasoline.

Cordially
Jean Marc

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