Fuel tank breather

[nrick]

Tank is imploding, anyone know how the tank is vented?

[mini me]

Mine has been doing the same, well lots of gushing noises everytime i remove the tank cap. I removed the trim from around the filler neck and there is a small pipe going off into the rear wheel arch. on mine this pipe was very kinked so i had to cut it a little shorter and re-fit it with new pipe clip. Seems to be better so far although i do get a little bit of pressure/vacuum release but nowhere near as bad as it was and the tank has stopped popping when i do it.

This is on a TAM by the way but assume the tuscan is the same.

[truck71]

Mine use to bang like a cannon going off (ooer missus), had it sorted by drilling a very small hole in the outer part of the filler cap through to the rubber. HTH.

[so called]

I had a new rubber o-ring fitted on my filler cap as there was no vacuum when I released the cap.
I was told there should be a light vacuum so a short air rush when releasing the cap.

[Ken Barlow]

nrick said:

Tank is imploding, anyone know how the tank is vented?

There is somthing behind the headlight in the offside front wing, not sure but think its a carbon filter

[Speed eight]

The pressure is there as an aid to fuel pump priming and is intentional.
To remove any excessive pressure that may build up there is also ( should be ) a one way valve in the system.
Mounted in the boot on the nearside behind the carpet. Early MK 1 Tuscan
The front mounted charcoal canister is to remove the fumes from the tank trickle breather.

Regards.
Speed eight.

[nrick]

Thanks, defo something wrong will check out.