20460123 Volvo.Penta Flange screw

Table 1
Required Tools Qty
245-5829 Coolant/Battery Tester Gp 1
Illustration 1 g00439083
245-5829 Coolant/Battery Tester Gp
Check the coolant frequently in cold weather for the proper protection against freezing. Use the 245-5829 Coolant/Battery Tester Gp in order to ensure adequate freeze protection. The tester gives immediate, accurate readings. The tester can be used for antifreeze/coolants that contain ethylene or propylene glycol. The tester is also used to check the condition of batteries (specific gravity). Instructions are provided with the tester.Making the Correct Antifreeze Mixtures
Adding pure antifreeze as a makeup solution for the cooling system top-off is an unacceptable practice. Adding pure antifreeze increases the concentration of antifreeze in the cooling system. Pure antifreeze increases the concentration of the dissolved solids and the undissolved chemical inhibitors in the cooling system. Add the antifreeze and water mixture in the same concentration as your cooling system. Refer to the engine Operation and Maintenance Manual.Testing the Supplemental Coolant Additive and the Glycol
Refer to the engine Operation and Maintenance Manual for further information about testing the cooling system.Testing for Air and/or Exhaust Gas in the Coolant
Air and/or exhaust gas in the coolant causes foaming and aeration. Bubbles in the cooling system reduce the heat transfer and the pump flow. Pockets of air or gas can prevent coolant from contacting parts of the engine. The pockets allow hot spots to develop.If the cooling system is not filled to the proper level, air can be trapped in the system. Filling the cooling system too quickly can also trap air in the system. Leaks from components such as aftercoolers and hoses can allow air to enter the system. The inlet of the water pump is a potential location for the entry of air.To help prevent air from entering the cooling system, fill the system slowly. The radiator cap must be removed when filling the system from the bottom. Make sure that all of the hoses and pipe connections are secure.If the cylinder head is loose or cracked, exhaust gas can enter the cooling system. Exhaust gas can also enter the cooling system through internal cracks and/or defects in the cylinder head gasket.Air and/or exhaust gas in the cooling system can cause overheating. Use the following test to check for the presence of air and/or exhaust gas in the coolant.
Make sure that the cooling system is filled to the proper level.
Illustration 2 g00769076
Remove the plug from the radiator (if equipped). Install a hose into the hole for the plug.
Fill a clear container with water and place the other end of the hose into the container.
Start the engine. Operate the engine until normal operating temperature is reached.
Observe the end of the hose in the clear container. A bubble may rise occasionally from the hose. An occasional bubble is normal.Air and/or exhaust gas in the coolant is indicated by a stream of bubbles.Testing the Radiator Fan (If Equipped)
Table 2
Required Tools Qty
348-5430 Multi-Tool Gp 1
308-7264 Multitach Tool Gp 1 The 348-5430 Multi-Tool Gp and the 308-7264 Multitach Tool Gp are used together to check the fan speed. For instructions, refer to the Operating Manual, NEHS1087 and Operating Manual, NEHS0605.Testing the Cooling System for Leaks
Table 3
Required Tools Qty
9S-8140 Pressurizing Pump 1 Use the following procedure in order to check 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.Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.
After the engine cools, carefully loosen the filler cap in order to release the pressure from the cooling system. Remove the filler cap.
Ensure that the cooling system is filled to the correct level.
Install the 9S-8140 Pressurizing Pump onto the radiator filler tube.
Increase the pressure reading on the gauge to 20 kPa (3 psi) more than the pressure on the filler cap.
Inspect the radiator, all connection points, and the hoses for leaks. If no leaks are found and the gauge reading remains steady for a minimum of 5 minutes, the cooling system is not leaking.If leaking is observed and/or the gauge reading decreases, make repairs, as needed.