Sacha, It is extremely unlikely that your water pump is not circulating coolant through your cooling system unless the drive belt is detached. The most common cause of rapid overheating is due to a broken water pump drive belt or insufficient coolant level. Check to see if you have at least 1" of coolant in your header tank when the engine is cold. Your are using the incorrect method to test your cooling fans. To test the fans simply unplug the two connectors at the cooling fan thermal switch (M:15:01 fig. 61 item# 1 workshop manual) located in the coolant return line on the driver side of the engine compartment. Insert any value blade fuse (any fuse from your fuse block will work) into the two connectors, turn on the ignition; both fans should activate. DMC Joe "We're here to help you" DMC Help / De Lorean Services / <dmchelp@xxxx> Web Site: <http://www.deloreanservices.com"> DeLorean services.com DMC.tv is in your future ..... [moderator snip]