R32 GTS-4: Fuel leaks until the car warms up then stops

[TJB91]

So my r32 gts4 has been unregistered for a while and therefore doesn't get driven. (lost my license and my job so didn't have the money to get her rwc) I was forced to move it into a storage unit and the week prior to that I noticed a slow fuel leak from the top of the fuel tank and then after a minute or so the leak would completely stop. Anyone had this issue before or know what is going on?

[GTSBoy]

Old hose cracked.

[Duncan]

Also worth checking that the fuel cap is working properly, particularly if the tank is pretty full and sitting in a hot storage unit it, the fuel cap should be venting excess pressure. If not pressure will build in the system, and it could do something like leak a little, or crack an old hose.

[GTSBoy]

33 minutes ago, Duncan said:

Also worth checking that the fuel cap is working properly, particularly if the tank is pretty full and sitting in a hot storage unit it, the fuel cap should be venting excess pressure. If not pressure will build in the system, and it could do something like leak a little, or crack an old hose.

Yeah, nah. Cap should seal. Tank vapours should vent through the carbon canister in the engine bay. If that hose run is compromised, then yes, pressure could build.

[Duncan]

Ahh yes, not race car