GT6 MK3 Fuel tank outlet

[David Kirk]

Hi all,

Just fitted a double S stainless exhaust to get my GT6 so I can get it  running. Then I can work out just how much work needs to be done. (it will be a lot)

The fuel outlet from the tank is directly above the left hand silencer box and as it comes out in a "rubber" pipe it is hard to get it to not touch the silencer which I guess is a timebomb!

I think I should replace it with copper pipe. Is 1/4" copper pipe the norm? If I use copper then I guess I can get a) a tighter bend to clear the exhaust and b) it won't melt through with the heat from the exhaust.

Is there an olive inside that fitting? or is it like brake pipe and just flared?. If it's an olive, do you know where I can get one from?

David

[Nigel Clark]

I would expect to see a copper pipe with a fairly tight bend coming out of the fuel tank through the boot floor. The current arrangement with rubber touching the silencer is clearly dangerous.

I will post a photo of the fuel pipe on my GT6 Mk3 later today or tomorrow.

Nigel

[Nigel Clark]

Here's the fuel tank outlet under the boot floor on my GT6.

Nigel

[Pete Lewis]

In general 4cyl use 1/4"    and 6 cyl use 5/16"    pipe diameters   

Pete

 

[Gully]

1 hour ago, Nigel Clark said:

I would expect to see a copper pipe with a fairly tight bend coming out of the fuel tank through the boot floor. The current arrangement with rubber touching the silencer is clearly dangerous.

I will post a photo of the fuel pipe on my GT6 Mk3 later today or tomorrow.

Nigel

Yes, copper pipe connects to my fuel tank too.

Gully

[dougbgt6]

Mine's not copper, factory original I think, dull silvery, steel? Cupronickel? I read cupro are best, but I don't think it makes a lot of odds, copper are easier to manipulate.

I notice Nigel's has a rubber joint directly above the chassis, good idea in case there's any movement, but tricky to replace. The first joint is normally on the chassis in the rear wheel arch, I have clamps on mine. Which were no help when the hose rotted out and gave way!  Half a tank full of fuel on the garage floor!  

Doug

[Adrian]

Hi I’ve an olive on mine. Same exhaust setup. Metal pipe

[Nigel Clark]

2 hours ago, dougbgt6 said:

I notice Nigel's has a rubber joint directly above the chassis, good idea in case there's any movement, but tricky to replace. The first joint is normally on the chassis in the rear wheel arch, I have clamps on mine. Which were no help when the hose rotted out and gave way!  Half a tank full of fuel on the garage floor!  

Doug

That's a piece of rubber pipe I slipped over the copper pipe to protect from rubbing on the chassis. The first joint is further forward.

Nigel

[David Kirk]

Thanks Everyone.

I have drained the tank now and disconnected the rubber hose from the fitting and removed the fitting (see photo)

So just a short piece of 5/16" copper pipe (Pete - you were correct about the size - not for the first time I suspect). It looks just like yours Adrian except shorter!

That's a shame as I have stock of 3/16 and 1/4 pipe but not 5/16. Time to expand my stock I guess! I'll get some pipe and some olives)

[Nigel Clark]

I replaced the fuel whole fuel line from tank to carbs on my GT6 nearly 20 years ago, using an Automec kit. The kit came from the TSSC shop, don't know if they still keep them in stock.

Nigel

[johny]

I think those Automec kits are certainly an expensive way to do it so bought the separate components to do it on my Vitesse at a fraction of the cost....

[Pete Lewis]

bear in mind any car in the 70s would use plastic fuel piping much easier to route without bruising the thumb !!!

not on sharp bends though  

if contemplating pipes and fitting go for micro bore CH  cheap !!

[David Kirk]

I have ordered 1.5m of copper pipe (5/16) and some olives from ebay. Came to about £10. I have hand held pipe bender which will be good to form a tight 90 deg bend out of the tank and the rest should be easy to get it to the joint in front of the rear axle.

Thanks for your help.

David

[2200]

I had issues with lack of fuel and full tank. I removed the tank and found the disk from a fuel additive bottle.  It was closing the recess off where the copper pipe comes through into the tank.  I made a longer tube with cross drilled holes so the low tank level stays the same. Worth doing if you are making up a new length of tube

 

Graham

[dougbgt6]

Graham,

I had that! Mine was a washer from a fuel can. Fortunately on a GT6 you can remove the sender mechanism and look inside, got it out with a wire coat hanger. They're dying out, environmentally unfriendly, so get a few in while you can!  

Doug