6.7L Cummins Cooling System – Coolant Heater – Install

For flange mounted coolant heaters, lubricate the new heater o-ring with clean 15W-40 engine oil.

Install the coolant heater and retaining capscrews.
Tighten the capscrews.
Torque Value: 24 Nโ€ขm [ 212 in-lb ]

For threaded coolant heaters, apply pipe sealant, Part
Number 3375066, to the threads of the coolant heater. Install the coolant heater into the cylinder block and tighten.
Torque Value: 55 Nโ€ขm [ 41 ft-lb]

Insert the power cord into the socket. Be careful to align the pins with the sockets of the power cord. Tighten the
retaining nut by hand.
NOTE: Do not apply power to the element until the cooling system is filled, and the engine has run long enough for
the thermostat to open and allow the air to escape.