Mechanic's advice

When I took the car back to the mechanic this afternoon he reminded me of a saying he has: never have your car serviced before you go on a long trip. He was prompted to say this because my car was overheating severely and he thought this had much to do with the radiator cap he replaced in last week's service. He had suggested this could cause problems - the old radiator cap was not containing pressure - thereby allowing a relative state of stasis within the cooling system. However, once the cap was replaced, the stasis was upset. A quick look under the hood showed a hose damaged, and the radiator having less than a wonderful time. I've left the car with him - and hopefully he'll be able to get a replacement/rehabilitated radiator and install it (and whatever new hoses are needed) by COB tomorrow.