Trying to find an avarage. Please post temperature.

 

Mine sits around 209-215F

 

You didn’t need to start a new thread:
https://www.northamericanmotoring.co...mperature.html

 

Hi,

Mines goes between 95ºc-100ºc , oil temp 100ºc-110ºc depending the speed and driving style.

 

I am happy someone asked this. My new to me 2010 cooper s runs around 205-210F on a typical daily drive. The highest I have seen it go up to was 219F. This is the first car I have owned that was not a Ford or GM and also the first turbo vehicle I have owned. The first time I drove the car with a scan tool hooked up with coolant temp live data I freaked out, I was turning the heat on high and trying to figure out why the temp light wasn’t coming on. Turns out it’s normal, just way higher than anything else I have ever driven.

 

Years ago in southern AZ encountered 116F heat. My Porsche Boxster coolant temperature climbed to 226F. Like you I was freaking out. Long story short made it home -- over 1000 miles away but not all driven in 116F heat -- with the car manifesting no issues. And the factory after some telemetry I had obtained was sent to it came back with as long as no over temperature or low coolant level warning lights came on no problem.

More recently well, in 2018 after I bought a Hellcat the coolant temperature would get up to 220F or even higher when I drove the car about 5 miles on city streets. Oil temperature would get to 238F.

Just yesterday evening I was out and about in my new JCW using an OBD2 scan tool to view coolant temperature in real time and try as I might I could not get it to go above 208F. I had the A/C off but based on the temperature once the engine up to operating temperature rising to 208F then dropping to 200F/199F then going up again and the dropping again and so on -- over time while not a minute not just a couple of seconds either. It would look like the JCW fan is being turned on at around 208F and shut off at around 200F.

 

mine is a 2010 S as well. And I also freaked out at first.

 

So how hot is "too hot" ? What temperature would be concerning?

 

Too hot is when the temperature continues to go up. A properly operating cooling system -- and this includes one that holds pressure -- should be able to deal with whatever heat load the engine produces.

I've driven a number of cars in triple digit heat -- up to 119F -- and while in at least one case while the coolant temperature seemed *high*(226F) it didn't get any higher.

Then with other cars since then I have observed coolant temperature even higher than 226F. In all cases the engine was fine. My 2020 M-B cargo van coolant temperature would get to 230F then drop when the fan was switched on.

It is imperative the cooling system be leak free. The ability to maintain pressure is crucial in order to prevent coolant from boiling. (Coolant boiling temperature is raised a bit by the presence of anti-freeze but pressure plays the major role in this.)

Even if there is no signs of overheating the odor of anti-freeze around a hot engine is a good sign there's a leak.

Also, as I was advised to do and as has been my habit for years is replace the coolant every 4 years. The additive package wears out and water pump seals and hoses suffer from this.