have been with this problem for a year. Replaced all filters, flushed out oil cooler off the engine, replaced sensors on coolant and oil, replaced radiator, water pump, thermostat, Fan comes on at 200 deg, but oil temp runs 250 to 270 on flat with 75000, van load. then goes up if I climb a grade, have to slow to 10 MPH to keep it under 270. if it goes over that the 1/4" air hose from compressor to governor blows from the turbo heat. Can I hook a override sw for the fanto be able to turn it on when I want. Mack rep says 250 to 270 is ok for short periods.
help
Ron
Which cooling fan setup does your truck have?Some of the 01 model truck came with one type from the factory,later with this problem being discovered by Mack they upgraded with what they called a cooling mod kit.This kit lowered the water pump changed the fan,shroud and clutch,for better air flow and so forth.
01 Vision 460 Oil Temp Problem
in Modern Mack Truck General Discussion
Posted
Which cooling fan setup does your truck have?Some of the 01 model truck came with one type from the factory,later with this problem being discovered by Mack they upgraded with what they called a cooling mod kit.This kit lowered the water pump changed the fan,shroud and clutch,for better air flow and so forth.