One Radiator Expansion Coolant Water Bottle Cap for: Peugeot 508 Never remove the cap from a hot engine, the cap may 'fly off' on releasing and hot coolant will burn your hand, if you must remove the cap, cover the cap with a suitable cloth, turn the cap slowly to release the pressure, then carefully remove the cap, do not put finger in hot coolant. Top tips Before Summer check the fan operates as fans can seize over Winter. If the fan comes on when if feels like or the temperature gauge appears faulty, the Water temperature sensor may be faulty.
