E300 W124 overheating

[telletubby]

Despite testing the secondary fan ( carrot test) my newly acquired diesel estate is still running at 110 with the a/c on in outside temperatures of 26c or 80F.

My E320 cabrio runs between 80/90 in the same conditions which I'd have thought was more normal. .

So I was surprised when my local stealership said it was 'normal' on the phone. Are they right? Do diesels run hotter?

I've booked it in for them to take a look at it on Friday but would value any comments.

 

[Myros]

I don't think that

110 constant running can't be right for any engine, as it's just about on the boiling point of your coolant. Maybe your pump is a bit suspect, or any of the other things surrounding it, such as thermostat, drive belt etc. What mileage has the car done?

 

[Chazchuzzlewitt]

110 doesn't sound right- what temps does it run when the AC is off?
Mine is none AC and is pretty much always a steady 85 with the occassional 87-90 when working hard.

 

[Mustang]

check thermostat valve,wen meter is showing 110 check ur radiator if its very hot it mn ur meter is showing right temp but if its normal than may be ur meter is faulty,check thermostat valve 1st.

 

[telletubby]

The car's done 270k kilometres - certainly will check the things you mention especially the thermostat valve.
Incidentally I waited because yesterday it was booked into the local stealership who rang last night to say car wouldn't be ready till tuesday. I went pale thinking they'd found a kinds of horrors. Nope - just didn't get round to looking at it!