C18 Marine Engines Coolant (ELC) - Change Caterpillar


Coolant (ELC) - Change
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1.1. Drain
2.1. Flush
3.1. Fill
4.2. Engines That Are Equipped with a Coolant Recovery Tank
5.2. Engines That Are Not Equipped with a Coolant Recovery Tank

------ WARNING! ------

Personal injury can result from hot coolant, steam and alkali.

At operating temperature, engine coolant is hot and under pressure. The heat exchanger and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.

Remove the filler cap slowly to relieve pressure only when the engine is stopped and the filler cap for the heat exchanger is cool enough to touch with your bare hand.

Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.



NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "AVSpare Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on AVSpare products.

Dispose of all fluids according to local regulations and mandates.


Clean the cooling system and flush the cooling system before the recommended maintenance interval if the following conditions exist:

  • The engine overheats frequently.

  • Foaming of the coolant

  • The oil has entered the cooling system and the coolant is contaminated.

  • The fuel has entered the cooling system and the coolant is contaminated.

Note: When the cooling system is cleaned, only clean water is needed when the ELC is drained and replaced.

Note: Inspect the water pump and the water temperature regulator after the cooling system has been drained. This inspection is a good opportunity to replace the water pump, the water temperature regulator, and the hoses, if necessary.

Drain



Illustration 1g01355994

  1. Stop the engine and allow the engine to cool. Loosen expansion tank filler cap (1) slowly in order to relieve any pressure. Remove the expansion tank filler cap.

  2. Open the cooling system drain valve (if equipped).

  3. In order to fully drain the coolant, remove the following plugs:

    1. Remove plug (2) in order to vent the water near the water temperature regulator.


      Illustration 2g01355995

    2. Remove drain plug (3) from the bottom heat exchanger.


      Illustration 3g01355996

    3. Remove drain plug (4) from the bottom of the water-cooled exhaust manifold.

    4. Remove drain plugs (5) from the bottom of the jacket water pump inlet.

    5. Remove drain plug (6) from the bottom of the oil cooler.

  4. Allow coolant to drain.


NOTICE

Dispose of used engine coolant properly or recycle. Various methods have been proposed to reclaim used coolant for reuse in engine cooling systems. The full distillation procedure is the only method acceptable by AVSpare to reclaim the used coolant.


For information regarding the disposal and the recycling of used coolant, consult your AVSpare dealer or consult AVSpare Service Technology Group:

Outside Illinois 1-800-542-TOOL
Inside Illinois 1-800-541-TOOL
Canada 1-800-523-TOOL

Flush

  1. Flush the cooling system with clean water in order to remove any debris.

  2. Close the drain valve (if equipped). Clean the drain plugs. Reinstall the drain plugs. Refer to the Operation and Maintenance Manual for more information on the proper torques.

  3. Fill the cooling system with clean water. Reinstall the expansion tank filler cap. Operate the engine until the temperature reaches 49 to 66°C (120 to 150°F).

  4. Stop the engine and allow the engine to cool. Loosen the expansion tank filler cap slowly in order to relieve any pressure. Remove the expansion tank filler cap. Open the drain valve (if equipped) or remove the cooling system drain plugs. Allow the water to drain. Flush the cooling system with clean water.

  5. If necessary, repeat step 2 through step 4.

Fill


NOTICE

Fill the cooling system no faster than 19 L (5 US gal) per minute to avoid air locks.


Engines That Are Equipped with a Coolant Recovery Tank

  1. Fill the expansion tank to the top with the ELC. Refer to the Operation and Maintenance Manual for more information on cooling system specifications.

  2. Reinstall the filler cap for the recovery tank.

  3. Start and run the engine at low idle. Increase the engine rpm to 1500 rpm. Run the engine at 1500 rpm for one minute in order to purge the air from the cavities of the engine block. Stop the engine.

  4. Loosen the filler cap of the recovery tank slowly in order to relieve any pressure. Remove the filler cap from the recovery tank.

  5. Pour the ELC into the tank until the coolant reaches the "COLD FULL" mark. Do not fill the tank above the "COLD FULL" mark.

  6. Clean the filler cap of the recovery tank. Reinstall the filler cap onto the recovery tank. Start the engine. Inspect the coolant recovery tank for coolant leaks and for proper operating temperature.

Engines That Are Not Equipped with a Coolant Recovery Tank

  1. Fill the expansion tank with the ELC. Do not reinstall the expansion tank filler cap.

  2. Start and run the engine at low idle. Increase the engine rpm to 1500 rpm. Run the engine at 1500 rpm for one minute in order to purge the air from the cavities of the engine block. Stop the engine.

  3. Check the coolant level. Maintain the coolant level within 13 mm (0.5 inch) below the bottom of the pipe for filling. Maintain the coolant level within 13 mm (0.5 inch) to the proper level on the sight glass (if equipped).

  4. Clean the expansion tank filler cap. Inspect the gasket of the filler cap for the expansion tank. If the gasket is damaged, discard the old expansion tank filler cap and install a new expansion tank filler cap. If the gasket is not damaged, use a 9S-8140 Pressurized Pump Group in order to pressure test the expansion tank filler cap. The correct pressure for the filler cap of the expansion tank is stamped on the face of the filler cap for the expansion tank. If the expansion tank filler cap does not retain the correct pressure, install a new expansion tank filler cap.

  5. Start the engine. Inspect the engine for coolant leaks and for proper operating temperature.