Thanks for the replies. I went up to my buddies late yesterday to have a look. We fired it up and within the first minute of driving (15 - 25mph) the guage started to rise. Less than 5 minutes it was over 200 degrees. Radiator was boiling over. I was assuming the pump but someone may have suggested the system and/or radiator could be clogged. What do you think. Thanks again in advance.