MAINTENANCE To protect against corrosion, a new coolant charge must be brought up to 0.26 SCA unit per liter [one unit per U.S. gallon] of coolant (initial charge). Maintain the correct SCA concentration by changing the service coolant filter at each engine oil and filter change interval. Each time the coolant is drained and replace, the coolant must be recharged with supplemental coolant additives. Use the appropriate replacement coolant filter listed in following tables. The coolant mixture must be drained and replaced as defined under "General.” The amount of a replacement inhibitor is determined by the length of the service interval and the cooling system capacity.
Refer to the DCA4 Unit Guide for the selection of the correct filter to replenish the supplemental coolant additives. 3-16 WA420-3MC