Right. I’m going to make a determined effort to sort out the overheating issue on my 3.0.
Thanks to TB and RichardA, what I know so far is that the instrument panel is configured correctly and that the fan system, switches, relays etc all come on when they should.
The symptoms show up in hot weather, especially in slow traffic, but it also runs hotter than it should at speed on the motorway. In traffic I have had the red light come on. On these 2 occassions I have stopped straight away and get the impression that the temp then drops quite quickly – on one occassion I stopped at traffic lights, turned ignition off, on again when lights went green and temp had dropped back to 97 or so from 100+
The stat appears to be closed from cold and temp rapidly climbs to 92 degree level just as it should. It stays there for a bit and then starts to rise again. Noticable most of the time, but only a real issue in very warm weather when it will start to push 100. Although I know for sure the fans come on, they don’t have the effect of rapidly reducing temp as they should.
My suspects:
- Radiator lost efficiency – this is my biggest suspect, backed up by the fans not having the effect they should.
- Stat opening but not fully
- Water pump failing
I am due to change cambelt (and water pump) soon and am considering removing the rad and reverse flushing while I’m at it (or should I bite the bullet and replace it?). I’m considering replacing the stat too to illiminate that but really would rather not – I don’t honestly think that’s the problem, and I know its a pain to do. I can’t see how the coolant pump could fail as its a relatively simple thing, but that will get changed with the belt.
Any thoughts, suggestions appreciated
Is it worth doing a flush with Forte or the like first? (I have flushed umteen times with water and it was running crystal clear)
Cheers,
Ian