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Old 11-04-2009, 02:22 PM   #1 (permalink)
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Z4 Cooling System

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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Old 11-04-2009, 04:05 PM   #2 (permalink)
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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.
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Old 11-04-2009, 04:13 PM   #3 (permalink)
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really? it requires replacement? hmm...that's bullshit.

it's that just for the z4, or all bimmers?
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Old 11-04-2009, 05:33 PM   #4 (permalink)
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All cars. Cooling systems don't last forever. In a BMW, you definitely want to replace it before it goes out on you. The cooling systems are the weak links on these cars.
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Old 11-05-2009, 02:37 AM   #5 (permalink)
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hmm...that sounds shitty, but you gotta do what you gotta do i guess. i had a honda when i was a kid never replaced anything on it...up until i totaled it at 180,000 ish miles...
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Old 11-05-2009, 02:52 AM   #6 (permalink)
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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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Old 11-05-2009, 02:56 AM   #7 (permalink)
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hmm...that sounds good. i should probably add that to my list of to-do's...
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Old 05-18-2010, 08:21 PM   #8 (permalink)
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I replaced the pump and thermostat at 75,000.
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