ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 008-015   Coolant Thermostat Housing Support

This procedure applies to marine QSL9 keel cooled engines only.

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

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.

CAUTION  Use caution when draining coolant that coolant is not spilled or drained into the bilge area. Do not pump the coolant overboard. If the coolant is not reused, it must be discarded in accordance with local environmental regulations.

• Drain the engine coolant. Refer to Procedure 008-018.
• Remove the thermostat housing. Refer to Procedure 008-014.

Remove the three thermostat housing support mounting capscrews and the thermostat housing support.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING  Some solvents are flammable and toxic. Read the manufacturer’s instructions before using.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Use solvent to clean the bracket.

Dry with compressed air.

Inspect the bracket for cracks or other damage.

Repair or replace the bracket, if damaged.

Install the thermostat housing bracket and mounting capscrews.

Tighten the capscrews.

• Install the thermostat housing. Refer to Procedure 008-014.
• Fill the engine with coolant. Refer to Procedure 008-018.

Operate the engine and check for leaks.