Do not loosen the radiator draincock with the system hot and pressurized. serious burns from the coolant can occur.
Do not waste reusable coolant. If the solution is clean, drain the coolant into a clean container for reuse.
1.Disconnect the battery negative cables.
2.Drain cooling system until coolant level is below thermostat
Constant tension hose clamps are used on most cooling system hoses. When removing or installing, use only tools designed for servicing this type of clamp, such as special clamp tool (number 6094).
A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original equipment clamp with a matching number or letter.
3.Remove radiator hose clamp and hose from thermostat housing (1).
4.Remove the three water outlet-to-cylinder head bolts and remove the water outlet connector .
5.Clean the mating surfaces of the water outlet connector and clean the thermostat seat groove at the top of the thermostat housing .
Fig. Exploded view of the thermostat housing (1), cylinder head (2) and thermostat (3)-5.9L diesel engine
1.Inspect thermostat seal for cuts or nicks. Replace if damaged.
2.Install the thermostat into the groove in the top of the cylinder head (2).
3.Install the thermostat housing (1) and bolts. Tighten the bolts to 89 inch lbs. (10 Nm).
4.Install the radiator upper hose and clamp.
5.Fill the cooling system with coolant.
6.Connect the battery negative cables.
7.Start the engine and check for coolant leaks. Run engine to check for proper thermostat operation.