147 Erratic Temperature Gauge - Alfa Romeo Forum
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(Post Link) post #1 of 4 Old 28-09-10 Thread Starter
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147 Erratic Temperature Gauge

Ive noticed this morning that my temp gauge was a bit erratic.

After about 5/10 mins of driving the temp gauge would rise and fall between 80 and 90 degrees quite erraticly.

Though after another 5 mins of driving it stops at 90degrees and stays there (this is what its always done!).

Can anyone suggest what would cause this?

Is this the early signs of a water pump failure?
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Sounds more like a sticky thermostat to me. One way to check for a waterpump failure is to go give it the beans up the motorway. If temps rise then you may be looking at a dicky pump or a failing rad. Just check you haven't got any airlocks too. Put the heaters and fan on and run it up in you driveway with the header tank cap off. PUt the cap on if the water goes to come out of the top though. This should clear any air. Also check the rad has no air in it by undoing the bleed nipple on the top left as you look at the front of the car. Do this when its cold though!

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Joss has it I think, this is the tell-tale sign that the thermostat is about to stick open, not a big problem but you may notice economy drop until it's resolved.
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(Post Link) post #4 of 4 Old 28-09-10 Thread Starter
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Thanks for the reply guys!

I was idling in bad bristol traffic this morning for a good 45 minutes and the tempreture didnt go above 90 degrees.

I'll check for air locks when i get home, and then in the morning I'll check the radiator!

Thanks again for the help!

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