M40 smells of petrol

[E30Gheko]

Every time I fill up my 318i it smells of petrol inside the car. I have had a look at the fuel lines in the bay and checked underneath for leaks etc but can't see anything.

It runs fine with no other issues.

Any ideas anyone?

[MrBenn]

The expansion tank pipes could be perished, under the rear seat on the drivers side.

[E30Gheko]

Thanks MrBenn. I shall have a look over the weekend.

[sparky1972]

check underneth where the main pipe connects to the tank might be leaking from there