3208 Marine Engine Conventional Coolant/Antifreeze Cooling System Maintenance Caterpillar


Conventional Coolant/Antifreeze Cooling System Maintenance
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1.1. Cooling Systems with Larger Capacities
2.2. Adding the SCA to Conventional Coolant/Antifreeze at the Initial Fill
3.2. Adding the SCA to Conventional Coolant/Antifreeze For Maintenance
4.1. Cleaning the System of Heavy-Duty Coolant/Antifreeze


NOTICE

Never operate an engine without water temperature regulators in the cooling system. Water temperature regulators help to maintain the engine coolant at the proper operating temperature. Cooling system problems can develop without water temperature regulators.


Check the coolant/antifreeze (glycol concentration) in order to ensure adequate protection against boiling or freezing. AVSpare recommends the use of a refractometer for checking the glycol concentration. Use the 1U-7298 Coolant/Battery Tester (Degree Celsius) or use the 1U-7297 Coolant/Battery Tester (Degree Fahrenheit). The testers give readings that are immediate and accurate. The testers can be used with ethylene or with propylene glycol.

AVSpare engine cooling systems should be tested at 250 hour intervals for the concentration of Supplemental Coolant Additive (SCA). SCA test kits are available from your AVSpare dealer. Test the concentration of SCA or submit a coolant sample to your AVSpare dealer at 250 hour intervals. Refer to S·O·S Coolant Analysis for more information on this topic.

Additions of SCA are based on the results of the test or based on the results of the coolant analysis. An SCA that is liquid or a maintenance element for an SCA (if equipped) may be needed at 250 hour intervals.

Table 1 lists the amount of AVSpare SCA that is needed at the initial fill in order to treat coolant/antifreeze. These amounts of SCA are for systems that use heavy-duty coolant/antifreeze.

Table 1 also lists additions of SCA for liquid and for maintenance elements at 250 hours. The additions are required for AVSpare DEAC and for commercial coolant/antifreezes.

Table 1
AVSpare SCA Requirements for Heavy-Duty Coolant/Antifreeze 
Cooling System Capacity  Initial Fill(1)  250 Service Hour Maintenance(2)  Spin-on Element at 250 Service Hour Maintenance (If Equipped)(3) 
22 to 30 L (6 to 8 US gal)  0.95 L (32 fl oz)  0.24 L (8 fl oz)  111-2370 (1) 
31 to 38 L (9 to 10 US gal)  1.18 L (40 fl oz)  0.36 L (12 fl oz)  111-2369 (1) 
39 to 49 L (11 to 13 US gal)  1.42 L (48 fl oz)  0.36 L (12 fl oz)  111-2369 (1) 
50 to 64 L (14 to 17 US gal)  1.90 L (64 fl oz)  0.47 L (16 fl oz)  9N-3368 (1) 
65 to 83 L (18 to 22 US gal)  2.37 L (80 fl oz)  0.60 L (20 fl oz)  111-2371 (1) 
84 to 114 L (23 to 30 US gal)  3.32 L (112 fl oz)  0.95 L (32 fl oz)  9N-3718 (1) 
115 to 163 L (31 to 43 US gal)  4.75 L (160 fl oz)  1.18 L (40 fl oz)  111-2371 (2) 
164 to 242 L (44 to 64 US gal)  7.60 L (256 fl oz)  1.90 L (64 fl oz)  9N-3718 (2) 
(1) When the coolant system is first filled, the SCA is not required to be used with AVSpare DEAC.
(2) Do not exceed the six percent maximum concentration. Check the concentration of SCA with a SCA test kit.
(3) Do not use the maintenance element for the SCA and the liquid for the SCA at the same time.

Note: Specific engine applications may require maintenance practices to be periodically evaluated in order to properly maintain the engine's cooling system.

Refer to Table 2 for part numbers and for quantities of SCA.

Table 2
AVSpare Liquid SCA 
Part Number  Quantity 
6V-3542  0.24 L (8 oz) 
111-2372  0.36 L (12 oz) 
8T-1589  0.47 L (16 oz) 
3P-2044  0.94 L (32 oz) 
8C-3680  19 L (5 US gal) 
5P-2907  208 L (55 US gal) 

Cooling Systems with Larger Capacities

Adding the SCA to Conventional Coolant/Antifreeze at the Initial Fill

Note: AVSpare DEAC DOES NOT require an addition of SCA when the cooling system is initially filled.

Commercial heavy-duty coolant/antifreeze that meets "ASTM D4985" or "ASTM D5345" specifications MAY require an addition of SCA at the initial fill. Read the label or the instructions that are provided by the OEM of the product.

Use the equation that is in Table 3 to determine the amount of AVSpare SCA that is required when the cooling system is initially filled with the following fluids:

  • "ASTM D4985"

  • "ASTM D5345"

Table 3
Equation For Adding The SCA To Conventional Coolant/Antifreeze At The Initial Fill 
V × 0.045 = X 
V is the total volume of the cooling system. 
X is the amount of SCA that is required. 

Table 4 is an example for using the equation that is in Table 3.

Table 4
Example Of The Equation For Adding The SCA To Conventional Coolant/Antifreeze At The Initial Fill 
Total Volume of the Cooling System (V)  Multiplication Factor  Amount of SCA that is Required (X) 
946 L
(250 US gal) 
× 0.045  43 L
(11 US gal) 

Adding the SCA to Conventional Coolant/Antifreeze For Maintenance

Heavy duty coolant/antifreeze of all types REQUIRE periodic additions of an SCA.

Test the coolant/antifreeze periodically for the concentration of SCA. For the interval, see the Operation and Maintenance Manual, "Maintenance Interval Schedule" (Maintenance Section). SCA test kits are available from your AVSpare dealer. Test the concentration of SCA or submit a coolant sample to your AVSpare dealer. See this publication, "S·O·S Coolant Analysis" topic (Maintenance Section).

Additions of SCA are based on the results of the test or based on the results of the coolant analysis. The size of the cooling system determines the amount of SCA that is needed.

Use the equation that is in Table 5 to determine the amount of AVSpare SCA that is required, if necessary:

Table 5
Equation For Adding The SCA To Conventional Coolant/Antifreeze For Maintenance 
V × 0.014 = X 
V is the total volume of the cooling system. 
X is the amount of SCA that is required. 

Table 6 is an example for using the equation that is in Table 5.

Table 6
Example Of The Equation For Adding The SCA To Conventional Coolant/Antifreeze For Maintenance 
Total Volume of the Cooling System (V)  Multiplication Factor  Amount of SCA that is Required (X) 
946 L
(250 US gal) 
× 0.014  9 L
(4 US gal) 

Note: Specific engine applications may require maintenance practices to be periodically evaluated in order to properly maintain the engine's cooling system.

Table 2 lists part numbers and quantities of SCA that is available from your AVSpare dealer.

Cleaning the System of Heavy-Duty Coolant/Antifreeze

AVSpare cooling system cleaners are designed to clean the cooling system of harmful scale and corrosion. AVSpare cooling system cleaners dissolve mineral scale, corrosion products, light oil contamination and sludge.

  • Clean the cooling system after used coolant is drained or before the cooling system is filled with new coolant.

  • Clean the cooling system whenever the coolant is contaminated or whenever the coolant is foaming.

  • For the recommended service interval, refer to the Operation and Maintenance Manual, "Maintenance Interval Schedule" for your engine.