944 Turbo L4-2479cc 2.5L SOHC Turbo (1988)
Expansion Tank: Description and Operation
The expansion tank is used as a fuel overflow canister.
When the gas tank is full and the outside temperature changes from cold to hot (or other influencing factors), the fuel expands into the expansion tank.
As the fuel level drops, the gas flows back into the tank via a hose connection.
