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I've read a number of articles regarding the cooling system on BMWs and there is this thread of thought that the system should be "replaced" somewhere around the 75,000 mile mark. Meaning new pump, new hoses, thermostat, radiator, etc., etc. Anybody else have some thoughts on this? My 2003 Z4 is coming up on 75,000 as we speak.
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Yup. The radiator will usually go for 100,000 miles, however. AT 60k, I am getting ready to change thermostat, pump, hoses. I will probably do radiator, etc. at 90,000. My car has teh same cooling system as yours.
Some last some dont my Radiator has done 155,000 miles, my stat did 135K my waterpump did 147,000, my rear hose 95K, front hoses 115K so they go at different times, but if you havent had the car long or repaired it yourself you havent got a clue whats been changed when and you dont really want to be driving down a highway and the radiator goes or anything else, so if you change them and document at what mileage, then you have a fairly good idea when they will approx go again....
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