over heating

[latreal]

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.

[marti5]

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???

[Bear]

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.