For fun, I ran a system check using my AutelAP200...an older model of code reader, but works fine. I ran a live engine test and focused in on the coolant temp readings. I don't have an overheating situation, I was more just curious.

There were two readings, one for Engine Coolant Temp and one for Engine Coolant Temp 2 - and with a warm engine, the numbers were 89 and 43 degrees celsius, respectively.

Now, being a guy that wonders about things and not leaving well-enough alone, I thought I would ask Autel where that second reading was coming from (their response was not useful.) I noodled on it and thought...hmm, that ought to be somewhere either on the other side of the system (down system like post radiator, hence the cooler temp) OR I have a misread.

I thought about going out there and doing some diagnostics, but then thought better of it and didn't want to fool with it. Now I am an obsessive type too so while I am not going to fool with it...I am going to think about it and at some point will have to break out the repair manual and see where I need to go and put my focus.

If you are still reading, here is the question...do those readings sound right to you?

5 litre, NA w/115K on the motor and a new cooling system EXCEPT the radiator.

 

The higher temp is the rear manifold sensor, the lower temp's the t-stat sensor.

EDIT: and yes the temps look correct. Prolonged idling will raise the t-stat temp closer to manifold temp otherwise it'll generally stay lower.

 

Thanks...do you happen to know if that is the normal operating range or reading?

 

Yes, see my edit answering your question...

 

Thank you...I learned a little today.