Cummins 4BT – Thermostat – Replacement

Preparatory Steps:
• Drain the coolant.
• Remove the drive belt.
• Disconnect negative battery cable.
• Disconnect the upper radiator hose.

13 mm, 16 mm
Remove the alternator mounting capscrew, loosen the alternator link capscrew and lower the alternator.

10 mm
Remove the thermostat housing, lifting bracket, thermo­stat and thermostat seal.

Clean the mating surfaces.

Position the rubber seal as shown for reassembly.

10 mm
Assemble the removed parts in the reverse order of re­moval.
Torque Value: 24 N®m [18 ft-lb]

13 mm, 16 mm

Install the alternator.

Torque Value:
(A) 24 N»m [18 ft-lb]
(B) 43 N»m [32 ft-lb]