2001 Pontiac Montana

2001 PONTIAC MONTANA
230,000 MILES • 6 CYL • 2WD • AUTOMATIC
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OSCAR MOLINA
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  • 1 POST
why the engine overheats and blows cold air insade,and when i blead the coolant sistem the engine temperature goes down and blows worm air for a wile and keep doing it over and over
Feb 22, 2009 at 10:50 PM
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DOITYOURESELF
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  • 48 POSTS
First ensure proper ratio of water and coolant in system and that it is full. Then check the top radiator hose to see if it is getting hot to touch when engine warms up, this will tell you if thermostat is opening, if not opening correctly engine will get too hot and hose will stay cool, replace thermostat.
If hose gets warm before engine overheats other problems could be:
blockage in radiator
water pump failing
blockage in heater core
blockage in heater hoses
old or contaminated coolant
bad radiator cap
servo belt not tensioned properly
Feb 23, 2009 at 2:45 PM
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