some
Location of the thermostat on a 2000 volkswagen beetle?
probably the heater core is clogged
red
If this happened immediately after changing the thermostat, then the most likely problem is the thermostat was installed backwards.The spring side of the thermostat faces the engine. It's the spring that is reacting to the coolant temperature and driving the valve to open/close.When the thermostat cannot open, that prevents any coolant from ever getting to the heater core. Thus, you shiver a lot!Pop it out, flip it over and you should be all sorts of warm and cozy.
If this happened immediately after changing the thermostat, then the most likely problem is the thermostat was installed backwards.The spring side of the thermostat faces the engine. It's the spring that is reacting to the coolant temperature and driving the valve to open/close.When the thermostat cannot open, that prevents any coolant from ever getting to the heater core. Thus, you shiver a lot!Pop it out, flip it over and you should be all sorts of warm and cozy.See "Related Questions" below for more
You need to first drain the coolant, to lessen the mess of spilt coolant. Next you have to unbolt the coolant neck at the block to access the thermostat. After replacing, you have to refill/bleed the coolant system.
coolant leak from wire harness
You don't have to, but without draining the radiator, you will have coolant all over the engine when you replace the thermostat. This is a good time to install a fresh 50/50 mix of antifreeze & distilled water. Don't forget to bleed all air from system.
2000 Volkswagen Beetle L4-1781cc 1.8LFig. 2 Engine Coolant Temperature (ECT) sensorThe engine coolant temperature sensor is installed in the coolant return (arrow), located between the cylinder head and the radiator
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2000 and 2001 (only) Engine coolant Thermostat Function
it is either on the side of the head or on the thermostat housing