Please help. I have a Grand Voyager 2.5 crd. The vehicle seem to overheat when going up a hill or rev more than 3000 rpm and returns to normal when going downhill, I have ensured that the radiator fans runs continuously. What could be the problem? There does not seem to be a leak from the radiator or the overflow bottle.

 

Using your email address as a user name will leave you wide open to scams. You should change it ASAP.

In answer to your question, your thermostat is probably jammed in the closed position. You need to replace it but it's a difficult job.

 

Thanks. How / Where do I change my username from an email address to something else?