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Engine Reliability Experience of Mixed Vehicle Fleets Operating on Engine Coolant Recycled with Reverse Osmosis Technology
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Abstract
In the late 1980s engine coolant recycling technologies were developed in response to a temporary but significant increase in the cost of ethylene glycol. Among these technologies was the adaptation of reverse osmosis water desalination processes by Stanadyne Automotive Corp.1 The technical paper describing the reverse osmosis (R/O) technology reports that the process efficiently recovers ethylene glycol and water in a sufficiently pure state to allow its use as a base fluid to reblend into engine coolant. Data generated in standard ASTM bench tests has demonstrated the capability of properly reinhibited R/O recycled engine coolant (ROREC) to comply with the performance requirements of accepted SAE, TMC, ASTM and OEM specifications. The technology has been applied commercially and this paper reports the operating experience of 15 users in Texas and California with diverse service applications. The experience has been very good. The data supports conclusions that users of ROREC experience engine and cooling system reliability and maintenance equal to or better than their earlier, traditional coolant maintenance programs.
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Citation
Eaton, E., "Engine Reliability Experience of Mixed Vehicle Fleets Operating on Engine Coolant Recycled with Reverse Osmosis Technology," SAE Technical Paper 962239, 1996, https://doi.org/10.4271/962239.Also In
References
- Huff, J. R. “Using Reverse Osmosis to Recycle Engine Coolant” SAE Paper 921635 SAE Warrendale, PA September 1992 Society of Automotive Engineers, Inc. Philadelphia, PA
- “Stanadyne Model 100 Engine Coolant Recycler” Radiator Reporter 21 4 April 1993 93-38 41
- Eaton, Edward Carr, Richard “Observations of the Reliability Effects of Operating Heavy Duty Diesel Engines with a Nitrite/Borate/Low Silicate Coolant with no coolant Change Interval” SAE Paper 960642 SAE September 1996 Society of Automotive Engineers, Inc. Warrendale, PA
- Kinisky, T. G. McKenzie, D. A. “Investigation of Premature Water Pump Seal Failures” Worldwide Trends in Engine Coolants, Cooling Systems Materials and Testing, SP-811 SAE 1990 Society of Automotive Engineers, Inc. Warrendale, PA 159 168
- GM Service Bulletin October 1994 General Motors Corp. Detroit MI
- TMC “Fleet Purchasing Specification for Nitrite-Containing Ethylene Glycol Base Coolant” VMRS 42, 53-999-005 1994-1995 Recommended Maintenance Practices Manual TMC, The Maintenance Council of The American Trucking Association, Inc. Alexandria, VA 1995 RP-329