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1. Remove the expansion tank pressure cap from the coolant expansion tank. 1. 2. Use water to clean cap in area of rubber seal and vacuum relief valve. Following manufacturers instructions, install the coolant expansion tank pressure cap to the pressure tester. 2. • NOTE: If the pressure tester is pressurised too quickly, an erroneous pressure reading may result. 3. Slowly pressurise the system until the pressure gauge reading stops increasing, and note highest pressure reading obtained. 3. 4. Release pressure and repeat Step 3 at least twice to make sure the pressure test reading is repeatable and within specification. 4. 5. If the pressure test gauge readings are not within specification, install a new coolant expansion tank pressure cap. 5. Thermostat Test Remove the thermostat Thermostat (303-03B Engine Cooling - TD4 2.2L Diesel, Removal and Installation). Inspect for visible damage, note its opening temperature and immerse it in water. Heat the water until this temperature is Thermostat (303-03B Engine Cooling - TD4 2.2L Diesel, Removal and Installation). If thermostat begins to open, continue to heat the water until the thermostat fully opens, 5.8 mm (0.2 in) or more off the Thermostat (303-03B Engine Cooling - TD4 2.2L Diesel, Removal and Installation). Radiator Leak Test - Removed from the Vehicle CAUTION: Do not leak test an aluminium radiator in the same water that is used to leak test copper/brass radiators. Flux and caustic cleaners may be present in the test water which will corrode aluminium. If a separate tank is not Clean the radiator before leak testing to prevent contamination of the test tank. Leak test the radiator in clean water with |