Genuine Chevrolet Astro Thermostat

Chevrolet Astro Thermostat Parts Questions & Answers

• Thermostat,Engine Coolant
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  Q: How to remove and replace a thermostat in a Chevrolet Astro's cooling system?

  A: If your engine is slow to heat up or overheats, it may be due to a thermostat issue. Before assuming the thermostat is at fault, check the coolant level, drivebelt tension, and temperature gauge. If the upper radiator hose is cold and the engine overheats, the thermostat is likely stuck closed and needs replacement. To exchange it, begin by unplugging the battery. Drain the coolant. Remove the air cleaner assembly and detach the upper radiator hose. Next, remove the thermostat housing cover and gasket, then remove the old thermostat. Use a scraper and thinner to clean the gasket surfaces, and apply sealant to the surfaces. Install the new thermostat and gasket. Reattach the cover and hose and check all hoses and clamps. Refill the system, run the engine, and look for leaks.