I have a 2001 Mazda 626 6 cyl that I only has 63,000 miles on it. I just purchased it 7 months agao for $4000 and have had to put approx $2000 into it for repairs on other things. I took it in because the temp gage was running hot. I was told it may be the head gasket because it was low about 1 1/2 gallons of water and there was no external leak and was further told it would be best if I just traded it in. I have put a lot of money into this car and have zero money for a new car. Are these cars prone to blow head gaskets? Is it worth getting repaired?