UENR0623-02 77 Cooling System Seal The dial indicator remains constant beyond 5 minutes. Surface for seal Remove any deposits that are found on these items, and remove any material that is found on these items. The inside of the cooling system has leakage only if the following conditions exist: The reading on the gauge goes down. 3. Install the pressure cap onto a suitable pressurizing pump. You do NOTobserve any outside leakage. Make any repairs, as required. 4. Observe the exact pressure that opens the filler cap. 5. Compare the pressure to the pressure rating that is found on the top of the filler cap. The pressure cap should open within 95 to 110 kPa (13.7788 to 15.9544 psi).
The pressure cap has a nominal pressure rating of 100 kPa (14.504 psi). i04338229 Engine Oil Cooler - Inspect 6. If the filler cap is damaged, replace the filler cap. Testing The Radiator And Cooling System For Leaks Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact the skin. Use the following procedure to test the radiator and the cooling system for leaks. Personal injury can result from hot coolant, steam and alkali. At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.
Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand. 1. When the engine has cooled, loosen the filler cap to the first stop. Allow the pressure to release from the cooling system. Then remove the filler cap. 2. Make sure that the coolant covers the top of the radiator core. Illustration 64 g02494121 Typical example 3. Put a suitable pressurizing Pump onto the radiator. 4. Use the pressurizing pump to increase the pressure to an amount of 20 kPa (3 psi) more than the operating pressure of the filler cap. Perform the following procedure in order to inspect the engine oil cooler. 1.
Place a container under the oil cooler in order to collect any engine oil or coolant that drains from the oil cooler. 5. Check the radiator for leakage on the outside. 6. Check all connections and hoses of the cooling system for leaks. 2. Refer to Disassembly and Assembly, “Engine Oil Cooler - Remove” for removal of the engine oil cooler. The radiator and the cooling system do not have leakage if all of the following conditions exist: 3. Thoroughly clean the oil cooler (1) and the cylinder block. You do NOTobserve any leakage after 5 minutes.