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sprinkles08, ASE Certified Technician
Category: UK Car
Satisfied Customers: 22802
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Overheating problem with 2001 bmw z3 1.9l. Overheats when on

Customer Question

Overheating problem with 2001 bmw z3 1.9l. Overheats when on the highway but fine around town. Just replaced the head and gaskets. Heater does run hot coolant has been bled, level is good. Had it on the anylizer shows readings are good for the thermostat and fan does operate.
Submitted: 1 year ago.
Category: UK Car
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

I'm assuming that the coolant level does stay full and there are no leaks.

If the coolant stays full, the thermostat and fan work correctly and the problem happens on the highway only then this is going to be a radiator issue. When cores become restricted it will essentially reduce the capacity of the radiator and prevent it from properly cooling the engine under higher loads such as highway driving.