Sportscoach wrote:
Wow did'nt know there were that many of us. Just purchased a 1978 Sportscoach M500 chassis. There has been quite abit of work done on this unit but still needs work. 440 engine is overheating, the water pump, fan clutch, and thermostat have been replaced. but it still overheats if you feel the radiator it is very hot on top and much cooler on the bottom, it has been chemically flushed could it still be plugged and in need of replacement If you have any answers let me know as this is my home away from home in Las Vegas and would like to get him repaired before I return. Thank you in advance for your reply!!
chemical flushs do very little. what needs to be done is to have the radiator boiled and rodded. it takes a small amount of calcium to plug a radiator. i always used distilled water - anti freeze mix, never tap water in my shop. if you are getting combustion gases in the cooling system, it will constantly over pressurize and pop coolant into the over flow or on to the ground. i would do a simple block test, and have the radiator boiled, in that order. call your local Napa and they can supply you with a " Block Test Kit". it will come with instructions, and is easy to do. a competent radiator shop can handle a "rod out" on the radiator. be advised if the radiator is real bad, it may need a re-core, or replacemet, either case is often a pricy one..
