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you sure its not just down to the cold weather......
I had thought about that, but it doesn't quite work out right. If I am driving down the motorway I would assume that the temp should be colder than when I am pottering around town but it can drop whilst driving in either situation.
Also it didn't do it during the last cold spell a few weeks back.
sit at idle temp at 90
start driving temp drop to 60-75
stop and idle again temp goes to 90, the thermosat is sticking open, probably takes ages for your car heaters to warm up on a morning too, but like said is it the plastic impellor of a faulty water pump that has cause it to stick open.
start driving temp drop to 60-75
stop and idle again temp goes to 90, the thermosat is sticking open, probably takes ages for your car heaters to warm up on a morning too, but like said is it the plastic impellor of a faulty water pump that has cause it to stick open.
You can tell if its the water pump by seeing if the water is being circulated. can check if its thermostat by feeling the hoses to and from radiator and if they open at 90, it could be the fan control units also..
but normally if it raises while stationary it will be down to the thermostat.
but normally if it raises while stationary it will be down to the thermostat.
Wow, thanks for all the answers fellas
From reading all your posts, the symptoms do seem to point to a dodgey thermostat.
I will have a look at that tomorrow, and get a new one fitted.
From reading all your posts, the symptoms do seem to point to a dodgey thermostat.
I will have a look at that tomorrow, and get a new one fitted.
Unlikely option but still a possibility, however you will get a new one with the thermostat anyway
My thermostat went last month, had the temp sender replaced first and made no difference. Temp gauge wouldn't get above 70. If I really thrashed it, then it owuld get up to 80 but drop back down again.
Like the previous post said I just started it up from cold and left it idleing, keep feeling the pipes in and out of the radiator, they should stay cold until the car gets hot, and then open to cool it, so once the car is hot both the top and bootm pipe should be too hot to hold.
Even after a 50 mile trip on the motorway both of my pipes were warm at best, so that was definately the thermostat. I also had the excess pollution light on, rubbish MPG and once warmed up a bit, if I stopped the car and re-started it immediatley it idled at 2500 rpm for 10-20 seconds.
Replaced the thermostat and all problems gone now.
Like the previous post said I just started it up from cold and left it idleing, keep feeling the pipes in and out of the radiator, they should stay cold until the car gets hot, and then open to cool it, so once the car is hot both the top and bootm pipe should be too hot to hold.
Even after a 50 mile trip on the motorway both of my pipes were warm at best, so that was definately the thermostat. I also had the excess pollution light on, rubbish MPG and once warmed up a bit, if I stopped the car and re-started it immediatley it idled at 2500 rpm for 10-20 seconds.
Replaced the thermostat and all problems gone now.
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