Why does my car run hot on longer journeys?
I have a 2001 Mercedes-Benz CLK convertible and it has started running warmer on longer journeys. The water and engine oil are topped up. It normally runs at above 85 degrees then shoots up to 100 degrees, though lowers if I drop to 60mph. Is this an issue and any ideas to fix it?
Asked on 8 October 2019 by Alexbath
Answered by
Alan Ross
From what you are describing we would suspect that the water pump is the problem. It may need replacing.
Looking for a garage you can trust? Honest John's Good Garage Guide has thousands of reader recommended garages, plus how-to guides and tips on servicing.
The Good Garage GuideSimilar questions
I have had my Rover 25's head gasket changed not long ago, my water pump three months ago and once again my water tank is emptying very quickly and needs changing more or less everyday. Do you have any...
I have a 2001 Audi A6 1.9 TDI 130 SE. Its given me 247,000 miles of trouble-free motoring and for the last 147,000 miles has been maintained by a local Bosch garage. The radiator was recently replaced...
My wife's 2007 Colt CZ1 1.1 petrol is our runabout and does mostly short journeys with the occasional longer run. It's done just over 41,000 since new in Dec 2007 and has been trouble-free and a great...
Elsewhere on 
