My 2003 Nissan Almera keeps overheating, what's the issue?

I have a 2003 Nissan Almera which keeps overheating. The water pump, thermostat and radiator cap are new. Could you help me?
There is likely to be a blockage somewhere, probably in the heater matrix. It's quite a rigmarole but you need to remove the thermostat then put though a twin pack of Radflush and, if that cures it using plain water, you can then drain and re-fill with proper coolant.
Answered by Honest John on

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