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View Full Version : 2000 pontiac Montana overheating after I changed waterpump and thermostat


bigdaddy5422000
Feb 21, 2010, 01:55 PM
2000 pontiac Montana overheating after I changed waterpump and thermostat fan blower still runs it is blowing air but air is cold

TxGreaseMonkey
Feb 21, 2010, 02:19 PM
Replace the radiator. Phosphate scale is likely blocking the passages. Afterwards, refill with a 50/50 mixture of Dec-Cool and distilled water.