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    Development of an Extended-Service Coolant Filter

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    An extended-service engine coolant filter has been developed, using conventional supplemental coolant additive (SCA) technology. This has been achieved by the use of a proprietary polymer coating, which delays the release of active engine coolant chemistry. Initial field data show a gradual release pattern for introducing SCA chemistry into the coolant, with complete release typically occurring in the range of 70 000 to 140 000 miles (112 651-225 302 km).


    supplemental coolant additive (SCA), extended service, extended-service interval, slow release, coolant filter, coolant, heavy duty

    Author Information:

    Mitchell, WA
    Senior consultant, Venture Activities Group, BetzDearborn, Crystal Lake, IL

    Hudgens, RD
    Senior staff research chemist, Fleetguard/Nelson Incorporated, Cookeville, TN

    Committee/Subcommittee: D15.09

    DOI: 10.1520/STP38260S