Technical Is it normal for car engine temperature to go up and down?

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Technical Is it normal for car engine temperature to go up and down?

You can only get an oil temp reading if there is an oil temp sensor on the engine.
I doubt Fiat spent any money on one of those.

If you can find a coolant temp sensor with the same thread as the sump plug, it may be possible to fit one there and set up a gauge. Real old school.

My Fabia has an oil temp reading.
Coolant got to normal, 90 on the gauge, after arouond 5 mins today. Oil temp took another 5 mins to reach 80, then about the same again to creep up to its 'normal' 95-97.

I love the idea of hacking a coolant sensor in the oil sump but it's not that high on the priority list;). Might want to add an oil pressure sensor though since I am really missing that one.
 
Is there a specific type of thermostat that should be put on the grande punto 1.2?
 
Already installed the new one ? Problem with fluctuating temperature (and gauge) fixed ?

Cheers, Bernie
 
All seems good haven't seen the guage drop once but then again we are in an incredible unseasonable heatwave in london :p
 
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