Please let us know if you need anything else to get the problem fixed. Not an auto repair expert? Letting them run too cool can problems after an extended period of time. The fan can come on at any time. You could use a non-contact infrared temp gun on the engine, then compare reading to temp gage. If you pinch your hose make sure that you are aware of the belted accessories and the fan.
It should be noted that most modern fuel injected engines to like to run at 200+ degrees. You've come to the right place to get affordable quality Thermostats for your Chevy Uplander. Just plur your Chevy Uplander and Year into the Year Make Model selector above and when you search for a Thermostat Auto Parts Warehouse will only show you parts that fit your vehicle. Good luck figuring out what is going on with your Uplander! Not counting the temp gage,any signs of overheating? The coolant temp sensor is on the driver side under the air intake duct on the rear cylinder head make sure you apply thread sealant to the threads of the new sensor upon installation to prevent leaks also use only dex-cool coolant if you add green or any universal coolant to the dex-cool it can cause engine damage also there is a small bleeder screw on the thermostat housing or on a bypass pipe on the passenger side of the engine remove one or both depending on which engine you have when you refill the coolant replace the screw s as soon as a steady flow of coolant comes out then finish topping off coolant as normal Here is a guide to help walk you through the steps with the location of the coolant sensor in the diagrams below. I haven't checked to see if you have radiator cap? The coolant flow is instant when you crank or start it because you don't have to wait for engine to warm-up, no thermostat. Sometimes on a cool engine, I remove the thermostat, hook everything up, make sure coolant is full. Is your coolant boiling over? How hot does the engine get in degrees F? When the engine is cold, no coolant flows through the engine.
Can you check coolant flow through the radiator? Once the engine reaches its operating temperature, the thermostat opens. Conclusion P0128 is not a serious threat to the immediate drivability of your Uplander. When a thermostat is stuck open, it allows coolant to flow through the engine at all times. Also, a mechanic will typically check under the hood where the radiator hose meets the thermostat housing. We've worked hard over 11 years designing a website experience that makes it easy for anyone to idenify whether parts fit their car. Check out the diagrams Below.
Sometimes when you open the cooling system, you get air in the system that can effect temp gage. If it is easy to pinch the hose, typically water will be flowing through it. . The readings should be close. P0128 Description The thermostat is a component that blocks the flow of coolant to the radiator until the engine has warmed up. This is due to a leak in the seal or the thermostat open stuck.
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