M11 Plus Series Engines Operation and Maintenance Manual – 008-006   Coolant Filter

Change the coolant filter at every oil and filter change interval unless the supplemental coolant additive Supplemental Coolant Additive (SCA) level is over 3 units. See the Supplemental Coolant Additive – Maintenance check in this section.

NOTE: The SCA level must be tested every 6 months.

The correct coolant filter to be used is determined by the total cooling system capacity and other operational factors. For the correct filter selection, refer to Coolant Recommendations, Bulletin 3666132.

WARNING  Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Heated coolant spray or steam can cause personal injury.

Remove the cooling system pressure cap.

Turn the valve on the coolant filter head to the OFF position.

WARNING  A small amount of coolant can leak when servicing the coolant filter with the shutoff valve in the OFF position. To reduce the possibility of personal injury, use caution to eliminate contact with hot coolant.

Remove and discard the coolant filter.

Clean the coolant filter head gasket’s surface.

CAUTION  If the filter canister is damaged in any way do not use it. Dents or scrapes can lead to a rupture or premature failure of the filter.

Apply a thin film of clean engine oil to the gasket sealing surface before installing the new coolant filter.

CAUTION  Mechanical overtightening can distort the filter threads or damage the filter head.

Install the new filter on the filter head. Tighten the filter until the gasket contacts the filter head surface.

Tighten the filter an additional ½ to ¾ of a turn, or as specified by the filter manufacturer.

CAUTION  The valve(s) must be in the ON position to prevent engine damage.

Turn the valve on the filter head to the ON position, and install the coolant system pressure cap.

Operate the engine and check for leaks.

After the air has been purged from the system, check the coolant level again.