- The engine overheats frequently.
- Foaming is observed.
- The oil has entered the cooling system and the coolant is contaminated.
- The fuel has entered the cooling system and the coolant is contaminated.
NOTICE |
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Use of commercially available cooling system cleaners may cause damage to cooling system components. Use only cooling system cleaners that are approved for Caterpillar engines. |
Note: Inspect the water pump and the water temperature regulator after the cooling system has been drained. This is a good opportunity to replace the water pump, the water temperature regulator and the hoses, if necessary.
Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure. |
- Stop the engine and allow the engine to cool. Loosen the cooling system filler cap slowly in order to relieve any pressure. Remove the cooling system filler cap.
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Illustration 2 g00740076 (3) Drain plug on the cylinder block Show/hide tableIllustration 3 g00822686 (4) Drain on the water cooled exhaust manifold for the 3054 Marine Generator Set Show/hide tableIllustration 4 g00822695 (5) Drain plug on the water cooled exhaust manifold for the 3056 Marine Generator Set Show/hide tableIllustration 5 g00822687 Engine oil cooler for the 3054 Marine Generator Set
(6) Hose for the outlet of the coolant
(7) Hose for the inlet of the coolantShow/hide tableIllustration 6 g00822694 (8) Heat exchanger for the 3056 Marine Generator Set
(9) Drain plug for the heat exchanger - Open the cooling system drain valve (if equipped). If the cooling system is not equipped with a drain valve, remove the cooling system drain plugs.
Remove the drain plug from the cylinder block (3). Remove the drain plug for the water cooled exhaust manifold (4) or (5). Remove the hoses for the engine oil cooler (6) and (7), if equipped. Remove hose for the heat exchanger on the 3054 engine. Remove the drain plug for the heat exchanger on the 3056 engine. Allow the coolant to drain.
Illustration 1 | g00740037 |
Typical example (1) Expansion tank (2) Cooling system filler cap |
NOTICE |
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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 Caterpillar to reclaim the used coolant. |
For information regarding the disposal and the recycling of used coolant, consult your Caterpillar dealer or consult Caterpillar Dealer Service Tool Group:
Outside Illinois 1-800-542-8665Inside Illinois 1-800-541-8665
Canada 1-800-523-8665
- Flush the cooling system with clean water in order to remove any debris.
- Close the drain valve (if equipped). Clean the drain plugs. Install the drain plugs. For the proper torque, refer to the Specifications Manual, SENR3130, "Torque Specifications".
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NOTICE Fill the cooling system no faster than
19 L (5 US gal) per minute to avoid air locks. - Fill the cooling system with a mixture of clean water and Caterpillar Fast Acting Cooling System Cleaner. Add
0.5 L (1 pint) of cleaner per15 L (4 US gal) of the cooling system capacity. Install the cooling system filler cap. - Start and run the engine at low idle for a minimum of 30 minutes with a coolant temperature of at least
82°C (180°F) .Show/hide tableNOTICE Improper or incomplete rinsing of the cooling system can result in damage to copper and other metal components.
To avoid damage to the cooling system, make sure to completely flush the cooling system with clear water. Continue to flush the system until all signs of the cleaning agent are gone.
- Stop the engine and allow the engine to cool. Loosen the cooling system filler cap slowly in order to relieve any pressure. Remove the cooling system 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. Close the drain valve (if equipped). Clean the drain plugs. Install the drain plugs. For the proper torque, refer to the Specifications Manual, SENR3130, "Torque Specifications".
Cooling Systems with Heavy Deposits or Plugging
Note: For the following procedure to be effective, there must be some active flow through the cooling system components.
- Flush the cooling system with clean water in order to remove any debris.
- Close the drain valve (if equipped). Clean the drain plugs. Install the drain plugs. For the proper torque, refer to the Specifications Manual, SENR3130, "Torque Specifications".
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NOTICE Fill the cooling system no faster than
19 L (5 US gal) per minute to avoid air locks. - Fill the cooling system with a mixture of clean water and Caterpillar Fast Acting Cooling System Cleaner. Add
0.5 L (1 pint) of cleaner per3.8 to 7.6 L (1 to 2 US gal) of the cooling system capacity. Install the cooling system filler cap. - Start and run the engine at low idle for a minimum of 90 minutes. The coolant temperature should be at least
82°C (180°F) .Show/hide tableNOTICE Improper or incomplete rinsing of the cooling system can result in damage to copper and other metal components.
To avoid damage to the cooling system, make sure to completely flush the cooling system with clear water. Continue to flush the system until all signs of the cleaning agent are gone.
- Stop the engine and allow the engine to cool. Loosen the cooling system filler cap slowly in order to relieve any pressure. Remove the cooling system 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. Close the drain valve (if equipped). Clean the drain plugs. Install the drain plugs. For the proper torque, refer to the Specifications Manual, SENR3130, "Torque Specifications".
- Fill the system to the top with the mixture of coolant/antifreeze that is recommended. Refer to the Operation and Maintenance Manual for more information on cooling system specifications. Do not install the cooling system filler cap.
- 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.
- Add coolant/antifreeze into the cooling system until the cooling system is full to the top.
- Clean the cooling system filler cap. Inspect the gasket for the cooling system filler cap. If the gasket for the cooling system filler cap is damaged, discard the old cooling system filler cap and install a new cooling system filler cap. If the gasket for the cooling system filler cap is not damaged, use a 9S-8140 Pressurizing Pump in order to pressure test the cooling system filler cap. The correct pressure for the cooling system filler cap is stamped on the face of the cooling system filler cap. If the cooling system filler cap does not retain the correct pressure, install a new cooling system filler cap.
- Pour coolant/antifreeze into the recovery tank until the coolant reaches "COLD FULL" mark. Do not fill the recovery tank above "COLD FULL" mark.
- Clean the filler cap for the expansion tank. Install the filler cap for the expansion tank. Start the engine. Inspect the cooling system for leaks and for proper operating temperature.
NOTICE |
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Fill the cooling system no faster than |