Leaking Plastic tank- Repaired permanently!

[Patman1200]

It's been a long time since I have been on here.

My 2001 955i has had a leaking tank for a fair while. It was only noticeable by the petrol smell after filling up until the fuel level dropped to about 1/2 a tank.

I finally removed the tank and found that it had gone porous at the top of the hump right underneath the filler cap.

After mulling over a load of suggestions all over the interwebby I decided to try something I know will work.
So I sanded down a large area around the porous leak to remove any dirt and paint.
I smothered the entire area with Hylomar oil and fuel resistant gasket. I ringed with with a smothering of Silkaflex boat and caravan sealant and stuck a plate of 2mm aluminium over the top.

5 months later it is still sealed.
Not brilliant if it is on a visible area of the tank, but it works.

[Ironhorse]

That's pretty aggressive, eh?

I have repaired mine with marinetex. It has 2 hard years of D/S and is holding very well. Mine was actually a repair of the nutserts.