Fuel line routing fro fuel pump. : TR4 & TR4A Forum : The Triumph Experience

Fuel line routing fro fuel pump. #1
malbaby malcolm baker kyabram, Australia Sign in to contact	Topic Creator (OP) Oct 23, 2014 09:48 PM Top Contributor Joined 19 years ago 3,828 Posts

Anyone have pics of a neat fuel line route from the factory fuel pump to the carbies.
I am not concerned if it is non factory.
Thanks in advance

Edited 1 time(s). Last edit at 2014-10-24 12:03 AM by malbaby.

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Re: Fuel line routing fro fuel pump. #2
Geko Stef SG Kuala Lumpur, WP, Malaysia Sign in to contact 1959 Triumph TR3A 1966 Triumph TR4A "SOLD" 2004 MG TF "WTF - Good Riddance"	Oct 24, 2014 05:55 PM Joined 12 years ago 927 Posts

just Goooogle it. I moved the fuel line towards the rear of the cylinder head and swapped the lids and floats of the float chambers

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Re: Fuel line routing fro fuel pump. #3
millersinbsmo Bruce Miller Blue Springs, MO, USA Sign in to contact 1966 Triumph TR4A 1979 MG MGB "Dustin"	Oct 28, 2014 04:40 PM Joined 15 years ago 67 Posts

My tr4a runs from the fuel pump in a metal line up to the front of the head, in front of the thermostat housing (under the hose to the radiator) then ends about six inches from the carbs. Don't remember if their is a rubber tube elbow by the fuel pump or a direct connection, I current have an in line fuel filter between the hard line and carbs, you could run direct to carbs with rubber hose.

I'll get a picture or two tomorrow
Bruce

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Re: Fuel line routing fro fuel pump. #4
millersinbsmo Bruce Miller Blue Springs, MO, USA Sign in to contact 1966 Triumph TR4A 1979 MG MGB "Dustin"	Oct 29, 2014 02:36 PM Joined 15 years ago 67 Posts

Hard line from fuel pump up to carbs with fuel hose making the end connection. Clamp secures hard line with bolt to lower thermostat cover bolt.

Can't guarantee this is "factory standard" but I would think so.

Bruce

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Re: Fuel line routing fro fuel pump. #5
malbaby malcolm baker kyabram, Australia Sign in to contact	Topic Creator (OP) Oct 30, 2014 12:38 AM Top Contributor Joined 19 years ago 3,828 Posts

Thanks for the pics Bruce.
This is what I did today.
Just for interest, the 3rd pic shows the narrow belt conversion that I am doing. [ running thermo fan set up]

Edited 1 time(s). Last edit at 2014-10-30 12:41 AM by malbaby.

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Re: Fuel line routing fro fuel pump. #6
millersinbsmo Bruce Miller Blue Springs, MO, USA Sign in to contact 1966 Triumph TR4A 1979 MG MGB "Dustin"	Oct 30, 2014 08:40 AM Joined 15 years ago 67 Posts

Oh so-o-o-o pretty! Don't figure my project will ever look so good.
Bruce

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Re: Fuel line routing fro fuel pump. #7
Geko Stef SG Kuala Lumpur, WP, Malaysia Sign in to contact 1959 Triumph TR3A 1966 Triumph TR4A "SOLD" 2004 MG TF "WTF - Good Riddance"	Nov 12, 2014 08:01 AM Joined 12 years ago 927 Posts

oil dipstick checked ?

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Route fuel line from tank to fuel pump #8
Rodney Bob S. Palm City, FL, USA Sign in to contact 1964 Triumph TR4	Sep 5, 2015 09:53 AM Joined 10 years ago 26 Posts

I am putting a 1964 TR4 back together and am not sure where the fuel line runs through the chassis from the tank to the pump. If somebody can help I would appreciate the help. Is steel line or braided line recommended and how long must the line be? Thank you!

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Re: Route fuel line from tank to fuel pump #9
Broken Wrench Steven S Albuquerque, NM, USA Sign in to contact 1949 Triumph 2000 Roadster 1957 Triumph TR3 1962 Triumph TR4 1968 Triumph TR250	Sep 5, 2015 05:18 PM Top Contributor Joined 13 years ago 1,358 Posts

My 4 lines run like Bruces' and I think is stock. Mal...oh man...that looks great. You might want to keep an eye on the closeness to the exhaust manifold and the possibility of percolating your fuel causing vapor lock after you shut down though.

Steve
TR250
TR4

68 TR250
57 TR3
Both regularly driven
49 Triumph 2000 Roadster project

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Re: Route fuel line from tank to fuel pump #10
Trike4 Marcus G Brighton, MI, USA Sign in to contact 1963 Triumph TR4 "Trike"	Sep 5, 2015 10:30 PM Joined 11 years ago 359 Posts

The line goes down from the tank to a hole through the frame. Mine has rubber grommets through the frame. It then bends along the frame and is clipped at several spots. It then passes through another hole in the frame and comes up to the fuel pump. It really is no where near the exhaust heat because it is outboard on the frame.
Mine had a flexible rubber tube joining the piece from the tank down to where the long piece passes through the frame. Another flexible rubber tube joining to the short pipe to fuel pump.
I replaced my aging and rusted fuel line with large brake line from an auto parts store. It was difficult to bend as needed and to still get it to feed through. I used the old fuel line as a template.

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Re: Fuel line routing fro fuel pump. #11
dadams62 Dan A Louisville, KY, USA Sign in to contact	Sep 6, 2015 05:51 AM Joined 13 years ago 547 Posts

Mine isn't stanchioned off on the right front side of the motor but hopefully these will help as well.

Cheers

Dan

"What a filthy job"
"Could be worse"
"How"
"Could be raining"

Edited 1 time(s). Last edit at 2015-09-06 05:52 AM by dadams62.

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Re: Fuel line routing fro fuel pump. #12
Rodney Bob S. Palm City, FL, USA Sign in to contact 1964 Triumph TR4	Oct 10, 2015 11:50 AM Joined 10 years ago 26 Posts

I am installing a new fuel line on my 1964 TR4. The diagram in Moss Motors shows a loop in the line just under the tank. Is this normal and necessary? Thank you!

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Re: Route fuel line from tank to fuel pump #13
tr4mp G D Auckland, New Zealand Sign in to contact	Jun 10, 2025 11:40 PM Joined 2 years ago 4 Posts

Marcus,
Did you run bigger fuel line all the way? And what size was this please?
I'm also wondering what the fitting sizes are. BSPT male thread?
Many thanks.

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Re: Fuel line routing fro fuel pump. #14
Merlin63Tr4 D R Milpitas, CA, USA Sign in to contact 1963 Triumph TR4 "Merlin"	Jun 11, 2025 09:29 AM Joined 9 years ago 1,029 Posts

Factory routing of fuel line from fuel pump outlet to carburetors.

D.

The first rule of troubleshooting. Never trust whoever was there before you, they couldn’t fix it.

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Re: Fuel line routing fro fuel pump. #15
tr4mp G D Auckland, New Zealand Sign in to contact	Jun 11, 2025 03:01 PM Joined 2 years ago 4 Posts

Very helpful. Thank you.

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