1996-02-01

Observations of the Reliability Effects of Operating Heavy Duty Diesel Engines with a Nitrite/Borate/Low Silicate Coolant with no Coolant Change Interval 960642

This paper discusses observations of the apparent effects of choosing to operate Heavy Duty Diesel (HDD) Engines with no coolant change interval, maintaining the coolant with a delayed release Nitrite/Borate/Very Low Silicate SCA and using coolant that is of a similar, fully formulated, low silicate, low total dissolved solids technology. It should be carefully noted that this practice is currently neither accepted nor recommended by most diesel engine manufacturers. The authors have accumulated the data from actual fleet maintenance files, and believe that observations, data and correlations seemed significant enough to warrant dissemination, and, more importantly, they suggest that further study would be of extreme value to further prove that existing North American coolant technology may have useful life far exceeding current OEM recommended change intervals.

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