Fuel Filler Point Leak

[brainbug007]

I tried putting some petrol in my tank tonight and it leaks at the filler point I've currently got a short piece of 50mm diameter tube (3mm wall) welded to the top of the tank, then a piece of fuel filler hose (http://www.cbsonline.co.uk/product/U...%22%29_FF F51) going between there and the filler cap (http://www.cbsonline.co.uk/product/8...y_Satin_AERO2). It's a fairly snug fit I thought as both ends of the hose are done up with clamps. When I fill it up it some comes out the bottom of the hose from between the hose and the steel tube welded to the top. I also went round the top of the steel tube with the welder to create a sort of raised section. Any suggestions as to how I can stop it leaking when filling up?

[tex]

Originally Posted by brainbug007

I tried putting some petrol in my tank tonight and it leaks at the filler point I've currently got a short piece of 50mm diameter tube (3mm wall) welded to the top of the tank, then a piece of fuel filler hose (http://www.cbsonline.co.uk/product/U...%22%29_FF F51) going between there and the filler cap (http://www.cbsonline.co.uk/product/8...y_Satin_AERO2). It's a fairly snug fit I thought as both ends of the hose are done up with clamps. When I fill it up it some comes out the bottom of the hose from between the hose and the steel tube welded to the top. I also went round the top of the steel tube with the welder to create a sort of raised section. Any suggestions as to how I can stop it leaking when filling up?

you must make sure that the faces where the pressure of the clamp is going to bear down on are very smooth, no rough bits etc - also if youve welded a lip to the top of the pipe it might have a rough bit thats nicking the hose as you push it over - perhaps

[robo]

That looks like the spiral wound filler hose. If it is you will need to wrap a piece of rubber round it then put the clamp on that because the clip rides on the wire support in the tube and fails to clamp the hose itself.

bob

[mark]

Use a mikalor (spelling?) clamp, i always used these on my turbo cars for boost pipes

They have a larger surface clamping area and tighten up way way more than a humble jubilee clip

[ayjay]

I think you are spot on there robo. Ive got similar stuff on my pond pump and filters and its a pig to stop leaking without almost cracking jubilee clips by overtightening

[brainbug007]

So would you guy say this would do the trick or do I need something thinner/thicker?

http://www.ebay.co.uk/itm/SOLID-RUBB...em3 cbc488410

[voucht]

Originally Posted by brainbug007

So would you guy say this would do the trick or do I need something thinner/thicker?

http://www.ebay.co.uk/itm/SOLID-RUBB...em3 cbc488410

The ebay product seems to be regular rubber. Be careful with non fuel-resistant rubber, it will melt with the fuel. This rubber is OK for water, but I don't think it is suitable for fuel. It has to be Nitrile or other fuel compatible rubber kind (but Nitrile is the most common).
Hope this will help.

[brainbug007]

Ah cool good to know! So what kind of thickness will be enough. 1, 1.5, 3mm?