[header] How to change a cummins 12 valve thermostat [title] Disconnect the negative (black) cable from the engine's battery. [title] Drain the engine's coolant into a container. [step] Close the container as soon as liquid stops draining from the truck.
[header] How to change a cummins 12 valve thermostat [title] Disconnect the negative (black) cable from the engine's battery. [title] Drain the engine's coolant into a container. [step] Close the container as soon as liquid stops draining from the truck.
[title] Reconnect the positive and negative terminals of the battery under the exhaust tubes by removing the negative (white) cable with the positive and negative terminal attached to the battery tubes. [title] Clean out the drain tube tubes by pulling one fuse flush with a new fuse. [title] Try this simpler method, but may seem old fashioned. [title] Detach the radiator's fuel hose from the engine. [title] Disconnect the motor shaft fittings from the engine. [title] Fill the loading chamber with fresh fuel and oil. [title] Lift the belt tensioner with a 3/8-inch (9.53 mm) breaker bar and remove the drive belt. [title] Disconnect the engine's upper radiator hose from the thermostat's cover.