SYMPOSIA PAPER Published: 01 January 1999

Development of an Extended-Service Coolant Filter


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).

Author Information

Mitchell, WA
Venture Activities Group, BetzDearborn, Crystal Lake, IL
Hudgens, RD
Fleetguard/Nelson Incorporated, Cookeville, TN
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Developed by Committee: D15
Pages: 409–425
DOI: 10.1520/STP38260S
ISBN-EB: 978-0-8031-5566-4
ISBN-13: 978-0-8031-2610-7