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#1 (permalink) Old 01-24-2009, 04:17 AM
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over heating

i have a 2001 740 il and it over heats when i get up to 60 m/hr but not all the time. could it be the radiator. it has radiator fluid in it and the only indications it get is from the dash when the temp rises.
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#2 (permalink) Old 01-24-2009, 05:03 AM
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Could be many things, but only at 60mph strange, I would go for the viscous fan coupling, are you losing fluid?

After that, waterpump (check for leaks now),check hoses, radiator etc etc, a leak should leave a whiteish residue which is the antifreeze dried out.

Oh, how do you know you have fluid in the rad as you are unable to see in to the rad???

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#3 (permalink) Old 01-26-2009, 01:08 PM
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Overheat

Overheat at 60 MPH points more to a water pump (IMO) that a visc ous fan clutch, in my case ('88 750) she would overheat a idle and be fine at speed, replacing the fan clutch solved that problem.
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