Centinel System – Repair Manual – 008-006   Coolant Filter

Refer to the Coolant Recommendations and Specification, Procedure 018-004 in the Operation and Maintenance Manual Signature and ISX Engines, Bulletin 3666251, the Operation and Maintenance Manual Industrial and Power Generation QSX15 Engines, Bulletin 3666423, or the Operation and Maintenance Manual Signature and ISX Engines, Bulletin 3666311.

An on/off valve is provided to prevent coolant leakage while changing the coolant filter.

With the valve in the ON position (1), the coolant flows to and from the coolant filter. In the OFF position (2), the coolant flow is cut off to and from the coolant filter.

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.

WARNING  Coolant is toxic. Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

Turn the coolant on/off valve to the OFF position.

Do not use force to open or close the on/off valve. If the valve does not turn freely, refer to Procedure 008-082.

Remove and discard the coolant filter. Clean the gasket surface on the filter head.

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

Apply a thin film of clean engine oil, or its equivalent, to the coolant filter gasket sealing surface before installing the coolant filter.

Tighten the coolant filter ½ to ¾ of a turn after initial gasket contact, or as specified by the manufacturer.

Turn the coolant on/off valve to the ON position.

Install the radiator pressure cap.

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.

Operate the engine until the coolant temperature is above 82°C [180°F], and check for coolant leaks.

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