CAUTION: Radiator internal pressure must not exceed 138 kPa (20 psi) . Damage may result.
- Back-flush the radiator. With the radiator upside down, position a high-pressure water hose in the lower hose location and back-flush.
- Remove the water hose connection and water thermostat.
- Back-flush the engine. Position the high-pressure hose into engine through the water thermostat location and back-flush the engine.