Where is the radiator thermostat in my 2001 AWD Chevy Astro? The van will spike on the temp. gauge and then regulate itself down intermittently. Furthermore, the heater stopped blowing hot air. I think that it is probably related to this thermostat. Any help would def. be appreciated.
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otad doesn't help ---did the trans come out of an 05 astro van s-10 blazer /jimmy s-15 or safari and it your awd because you need to match the rwd with an rwd and a awd with an awd /4wd from above and the unit has to be compatible with the 05
I am thinking the thermostat is stuck closed. Take of the top radiator hose and take off housing and put the thermostat in a pot and heat up to boiling temperature and see if it opens. If it doesn't replace it. This happens when a car is not used for a long time.
coolant temperature sensor is located next to thermostat housing at front of engine in intake manifold you will see it right next to top radiator hose but this one reports to pcm the one for the gauge in dash or light is on the drivers side cylinder head you will see one little wire going to a sensor screwed in head near second plug back on drivers side
Check coolant level, and possibly replace thermostat. When a thermostat gets stuck in the closed position, coolant does not circulate thru motor. Gauge stays midrange when driving, because motor is being cooled by air and or the fan. If car seems to operate completely normal, then the gauge is faulty.
you have 4 water lines, they are 2 radiator hoses (top and bottom) the bottom one runs from the lower part of the radiator to the water pump, the top radiator hose runs from the upper part of the radiator to the thermostat housing
2 heater hoses, they go from the water pump to the firewall.
if you know which one has a hole then you should take the van to a parts store (if you can safely drive it that far) and show them, they can get the right one for you... and sometimes you can talk someone into putting it on for you.
as for the fluctuating gauges you probably need new sending units for the temp gauge and fuel gauge
Make sure you have gotten all the air out of the system by running the car with the cap off for a bit.. also make sure the radiator overflow if at proper level.. next look at your radiator and see if it is plugged up with trash bugs what ever this will slow your cooling big time.. also look between your radiator and your air condition condensor and make sure its clean also there can be trash in there causing it to heat .. also check belts make sure they are tight.. really sounds like you started with air in system and system might be air locked needing to run a bit with cap off when cool. dont take cap off when hot ... make sure over flow is full also... thanks and holler if you need more. Jerry