Can't get coolant flow after changing the thermostat
2001 sunfire when i changed the thermostat the coolant won't flow thru the system even when i try to air bleed it ' but if i take out the thermostat the coolant flows fine.how do i get the coolant to flow thru the system?the car is heating up really hot and it still won't open the thermostat
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What part of the cooling system is important to know about? The coolant is generally pulled from the bottom of the radiator, into the water pump, forced into the engine passages,up thru the thermostat,if hot enough, and back thru the big hose to the TOP of the radiator to drop as it cools again.
Meantime, even if the thermostat hasn't opened yet, the warm coolant is forced out the smaller heater hose near te thermostat,thru the heater core and is pulled back into the water pump thru the return heater hose. Did this help? don-ohio (:^)
Bad coolant flow. check for low coolant, also a thermostat could be restricting proper coolant flow. If coolant is full in the radiator than touch your upper radiator hose to see if it is hot. If their is proper coolant level and engine is warmed up to temp and radiator hose is cold replace your thermostat.
sounds like the radiator is blocked either coolant flow or ext air flow through the matrix the thermostat can get ruined when the system overheats so allways change the stat after a overheat problem GET THE RAD CHECKED FIRST if ok check the coolant pump
If you flushed the coolant with the thermostat in, chances are you didn't flush the coolant. Regardless, it's easiest to check the controls inside first. Does the blower fan work? Does the air flow change from floor to vent, to dash as it's supposed to? Does the A/C change temps when knob is turned from cold to hot? Post results.
The basic answer is not enough coolant flow or not enough air flow thru the radiator. You'll have to find out if the coolant is flowing when the thermostat is open, is the system full of fluid, and is there enough air flow thru the radiator. Does it get over 220 degrees if you are moving and at idle too ?
What you are describing is a lack of coolant flow in the engine or radiator, or lack of air flow thru the radiator. If you are sure the coolant level is ok, and flow is good, I would check for a restriction in air flow thru the condenser and radiator.
You are correct in your suspicions. The thermostat blocks flow thru the radiator to help the engine warm up. The coolant still flows thru the block with the thermostat closed. If you remove the thermostat the cooling system should flow thru the radiator and stay below 160 degrees if the air temp is below 90. If the thermostat is out and the engine is getting hot at idle speed, either the water pump has failed, or there is another blockage in the engine block.
Coolant should be mixed with water before adding it to the plastic container. If the coolant is not already mixed with water at a 50/50 ratio, (50 percent water/50 percent coolant) do so before adding. Coolant should always be mixed and not added as straight coolant, the water helps the coolant flow thru the cooling system and aids in helping the coolant remove heat from the engine during the cooling process.