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Re: 93 blazer overheating, no heat, coolant boiling out of reservoir Help!
Three easy things. Make sure your radiator is filled, replace the thermostat and flush the heater core. If either one of them is blocked it could cause the problems you are having. Also I had a Ford Probe with the same exact problem and it was leaking coolant. It would over heat, no heat, and boil over because the engine got way to hot because there was enough coolant in the system.
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