M11 Series – Service Manual – 008-015   Coolant Thermostat Housing Support

WARNING  Coolant is toxic. Keep children and pets away. If the coolant is not going to be reused, dispose of it in accordance with federal, state, and local regulations.

Drain the cooling system.

Refer to Procedure 008-018.

Remove the alternator drive belt and the alternator. Refer to the following:

Procedure 013-005,
Procedure 013-001.

Remove the thermostat housing and bypass hose.

Refer to Procedure 008-014.

Remove the four lubricating oil cooler thermostat support flange capscrews.

Push the water transfer tube connections into the lubricating oil cooler as far as possible.

Remove the two water transfer tube mounting capscrews.

Remove the three water pump mounting capscrews.

Twist the water pump outward, and remove the water transfer tube from the water pump body.

Remove the air compressor coolant supply line.

Remove the coolant temperature sensor.

Remove the remaining capscrews and the thermostat housing support.

Remove the lubricating oil cooler water connection tubes from the cooler.

Use solvent to clean the lubricating oil cooler water transfer tubes, water pump water transfer tubes, and thermostat housing support.

Dry with compressed air.

Inspect the water transfer tubes and thermostat housing support for cracks or damage.

If any parts are damaged, they

must be replaced.

Install new o-rings on the lubricating oil cooler water connection tubes.

Use clean 15W-40 engine oil to lubricate the o-rings.

While holding the connection flange in place, install the water connections into the lubricating oil cooler. The straight edges of the connection

must face each other.

Install two new o-rings on the end of the lubricating oil cooler water tube connections.

Lubricate the o-rings with clean 15W-40 engine oil.

Use a new gasket, and install the thermostat housing support and capscrews.

Install the air compressor coolant supply line.

Install the coolant temperature sensor.

Install the four mounting flange capscrews. Alternately and evenly, tighten the four capscrews.

NOTE: Be sure the o-rings on the end of the connection tubes are located correctly.

Install a new o-ring on the water pump water transfer tube.

Use clean 15W-40 oil to lubricate the o-ring.

Install the water transfer tube and o-ring assembly in the water pump body.

Rotate the water pump inward and install the three water pump mounting capscrews.

Use a new gasket, and install the water pump water transfer tube mounting capscrews.

Install the thermostat and thermostat housing.

Refer to Procedure 008-014.

Install the alternator and drive belt. Refer to the following:

Procedure 013-001,
Procedure 013-005.

Fill the cooling system.

Refer to Procedure 008-018.

Operate the engine until it reaches a temperature of 80°C [180°F]
and check for coolant leaks.