Have tried to "bleed " the system after thermostat replacement, see no antifreeze burn out the back of the tail pipe.
Could be a blend door problem under the dash.
If one heater hose is hot and the other is not, could also be a blockage in the heater core.
SOURCE: replace thermostat 2003 pontiac montana
yes but with the right shaped wrenches and tiny hands it can be done without removing the exhaust crossover pipe
SOURCE: 2002 Pontiac Montana Thermostat replacement
check the coolant level fiirst...if that is low it wont give you any heat.....to change the thermostat you have to follow the top radiator hose to the engine.at the send of it you will see a clamp take it loose...then you will see the thermostat housing its held in place by 2 bolts . once you remove them you have the thermostat....make sure you clean all the old gasket material off both the housing and mount.also make sure you get a new gasket.
SOURCE: Replace heater core in Pontiac Grand Am GT 3.4l
ram a sharp chissel or pointed head centre punch through the core and prise it out .,than tap the new one in place ,,,there u go bobs ure uncle
SOURCE: 2001 pontiac montana overheating no warm air when heat is on
Might be a weak or failing water pump... Does it leak antifreeze or do you have to add antifreeze very often? When the engine gets to operating temperature squeeze the top radiator hose and see if you can feel pressure from the water pump forcing water through it.
SOURCE: 2001 GRAND AM KEEPS OVERHEATING
i believe the heater core broke or got crak chech the thermostat again
There is a mix damper inside your duct that controls the heat over heater core and ac evaporator that to your floor and one to your defrost. it is probable an electric actuator, that is not functioning properly. If yu can locate it and manually move it, you might have to remove the actuator motor first, you should be able to figure out your problem, I hope this helps! merry Christmas!
346 views
Usually answered in minutes!
No blend door or heater core problem, just changed the engine and trans our of a 2001 chevy venture, they worked fine before, that is why I changed the thermostat. am going to change the water pump. will post later what happens.
×