M11 Series – Service Manual – 008-007   Coolant Filter Head

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 three capscrews and the filter head.

Remove the two o-rings.

Use solvent to clean the filter head. Dry with compressed air.

Inspect the filter head for cracks or other damage.

Turn the control valve by hand. If the valve does

not
rotate freely, remove and inspect the valve.

To remove the valve, remove the capscrew, and pull the valve out of the housing.

Remove the o-ring from the valve.

Inspect the valve for corrosion or pitting.

Inspect the housing bore for corrosion or pitting.

Clean or replace the valve and housing, if necessary.

Install a new o-ring on the valve.

Lubricate the o-ring with a film of antiseize compound.

Install the valve in the filter head.

Tighten the capscrew.

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

Install the o-rings on the filter head.

CAUTION  The control valve must be in the ON position to prevent engine damage.

Install the filter head and filter, if removed.

Tighten the capscrews.

Turn the control valve to the ON position.

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.

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.