Drain the cooling system. Refer to STANDARD PROCEDURE . Remove the thermostat housing. Refer to THERMOSTAT, REMOVAL AND INSTALLATION . Install a thermostat housing that has had the thermostat removed. Disconnect the radiator upper hose from the radiator and attach the flushing gun to the radiator upper hose. Disconnect the radiator lower hose from the radiator and attach the lead away hose to the lower radiator hose.

Connect the water supply hose and air supply hose to the flushing gun. Allow the engine to fill with water. When the engine is filled, apply air in short blasts, allowing the system to fill between air blasts. Continue until clean water flows through the lead away hose. For more information, refer to operating instructions supplied with flushing equipment.

Remove the lead away hose, flushing gun, water supply hose and air supply hose. Remove the thermostat housing that has had the thermostat removed and install a new thermostat and housing with a replacement gasket. Refer to THERMOSTAT, REMOVAL AND INSTALLATION . Connect the radiator hoses. Refill the cooling system with the correct antifreeze/water mixture. Refer to STANDARD PROCEDURE .

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Reverse Flushing Engine

Use the Manual With the Right Hardware

When to See a Mechanic