Fuel Tank

MartinClan · #1 26th April 2007, 07:32

Now I have the rear body (temporarily) fitted I thought I would complete the installation of the fuel tank. On the top of the tank there are two pipes. The big one where the fuel goes in - but what is the small one for. Is it a breather - in which case what is it connected to?

Cheers

Robin

Patrick · #2 26th April 2007, 10:02

Its for the breather (one way valve) which connects from the tank to the breather which just sits in free air as far as I can tell.

It just there to let air in as the fuel is used up!

MartinClan · #3 26th April 2007, 11:11

Thanks Patrick

So what does the one way valve look like and where did it come from? My tank wasn't supplied with one.

Cheers

Robin

Patrick · #4 26th April 2007, 11:19

Its a little metal thing with 8mm push on fittings either side - the middle part is 6 sided like a spanner. It came with the kit from Marlin.

Merlin Motorsport have some I think. There are some quite nice ones you can bolt into the tank then attach the breather pipe.

peterux · #5 26th April 2007, 11:41

Mine came with the tank from Marlin.

Another 'phone call to Devon, me thinks!

MartinClan · #6 26th April 2007, 12:01

Quote:

Originally Posted by peterux

Mine came with the tank from Marlin.

Another 'phone call to Devon, me thinks!

I think you are right. They are £20 plus from places like Merlin

I will see what Terry has to say....

Robin

PJC · #7 28th April 2007, 20:43

Hi,

Be aware that there are two separate functions.
I don't have a Marlin supplied kit for fueltank but examined the Ford standard unit carefully.

The big pipe is for the filler function of course.
The small pipe I use for a 16mm fuelpipe to return to the tank dop.
When filling in fuel you must be able to allow lots of air to go out of the tank to the side of the fillerneck to prevent to flow back through the fillerpipe itself, or the fuelhandle at the gasstation will think the tank is full !!!

I bought a small valve that goes through a separate hole. Maybe you can build it in the return pipe as well, I don't like Ford does.
This allows air to go IN the tank while driving and consuming fuel, otherwise your tank will collapse because your tankdop is airclosed !

Also this valve has a flexible fuelline on it that is open to breath but located in that way that if your car is up side down there won't go any fuel out of it !

Picture is below if I succeeded to do that for the first time...

Peter-Jan