STP1335

    Heavy-duty Fleet Test Evaluation Of Recycled Engine Coolant

    Published: Jan 1999


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    Abstract

    A 240 000 mile (386 232 km) fleet test was conducted to evaluate recycled engine coolant against factory fill coolant. The fleet consisted of 12 new Navistar International Model 9600 trucks equipped with Detroit Diesel Series 60 engines. Six of the trucks were drained and filled with the recycled engine coolant that had been recycled by a chemical treatment/filtration/reinhibited process. The other six test trucks contained the factory filled coolant. All the trucks followed the same maintenance practices which included the use of supplemental coolant additives. The trucks were equipped with metal specimen bundles. Metal specimen bundles and coolant samples were periodically removed to monitor the cooling system chemistry. A comparison of the solution chemistry and metal coupon corrosion patterns for the recycled and factory filled coolants is presented and discussed.

    Keywords:

    engine coolant, fleet testing, engine coolant recycling, supplemental coolant additive, SCA, corrosion test data, solution analysis, depletion rate, glycol degradation acids, chloride and sulfate


    Author Information:

    Woyciesjes, PM
    Research chemist and research engineer, Coolant Group, Prestone Products Corporation, Danbury, CT

    Frost, RA
    Research chemist and research engineer, Coolant Group, Prestone Products Corporation, Danbury, CT


    Paper ID: STP38252S

    Committee/Subcommittee: D15.15

    DOI: 10.1520/STP38252S


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