Hi guys
The temperature gauge on my ZX TD has been running slightly cool recently, around 80 - 85C instead of the 90 - 100C I believe is normal. As it was overdue, I renewed the coolant, and the thermostat (which I suspected might be the cause). I let the car idle for around 20-30 mins, sometimes running it up to 2000rpm. The gauge barely got up to 90C before slowly dropping down to 80 - 85C without the fans cutting in. I couldn't get the temperature gauge to go over 90C and the fans haven't cut in since. Normal operating temperature is still 80-85C. I'm more curious than worried as I'd rather have over cooling than over heating, but has anyone got any ideas on this one? Should I just have run it on a faster idle for longer to check the fans would work?
cheers in advance
Tony
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80 is the normal running temp for a ZX TD. Should go up to around 90 / 95 before the fans cut in. It can be difficult to get the fans to cut in on an idling diesel - take it for good hard run then let it idle, and the temp should come up and the fans cut in.
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thanks alot for this Richard. Much appreciated
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Usually there is 2 thermostats you can fit a summer one and a winter one, the summer opens at a lower temp and the winter at a higher temp.
Id rather have the summer stat if the fans work don't worry.
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Was the temp. stated on the new one the same as the old one? Factors' charts aren't always accurate - best to go to the manufacturer if you're not sure.
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thanks big tee & mfarrow. The new thermostat states it opens at 83C, couldn't decipher any figures on the old one!
cheers
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I have the same story on my zx 1.9 n/a diesel.....temp never goes beyond 70/75....
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Don't believe the figures implicitly-the gauges are not that good-there is a lot to be said for the BLUE-WHITE-RED type of gauge.
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