dose anyone know what the two 'vavles' do either side of the fuel tank?snapped one of mine and the dealer wanted £68.00 + vat!got a 2nd hand one and had to heat up the blue pipe to get it on (its not on all the way on the stub)is it under any pressure?
thanks.

Fuel tank breather valves -so pretty important, but not under that much pressure (one of mine is glued together).
£68+vat -they're taking the Micky!
If you use the ePER link at the top of the page, enter your car details, & it will give you the Fiat part numbers -so you can track down parts on the internet.

thanks for that.got the pair for 15 quid. just hope the pipe stays on. will fuel gush out if it comes loose?

Depends on how full the tank is & how you drive the Sei.... if it's anything like i drive ( i tend to drive it like my Mini!) then Yes everytime you brake or take a corner (joking aside the valve is designed not to allow fuel to gush out).
Fuel vapour definitely will - & that's not a good thing either.