I have replaced thermostat, water pump, head gasket, and the motor is still overheating. The radiator is cool, but both hoses coming out of it are hot.
Sounds like the radiator might b clogged not allowing coolant to flow. remove both radiator hoses and insert a garden hose and see how much water comes out the bottom..if it flows freely then u have a blockage somewhere not allowing coolant to flow... if the hoses are rock hard when car is running and overheating then u have a cracked head and will have to change it with a new one.
SOURCE: my vw polo keeps overheating after 1 mile or 2 the
sounds like the plastic impeller has broke on the water pump.
SOURCE: Hi, my 99 vw beetle
Head gasket for sure would cause it to smoke and get hot. May seem like a stupid question, but did they check the thermostat? If head gaskets are good now and radiator was replaced, look for the obvious. Thermostat or air bound engine. An air pocket in the engine could also cause this. Need to bleed the air out of the cooling system. Some cars have a bleed screw to do this.
SOURCE: 98 VW Beetle. Changed out the thermostat for an
I have a 1985 Jetta diesel. What I did since the car has no way of bleeding the air out of the system via bleeder screw I parked the car on a slight incline leaving the tank for the fluid at a higher level. I ran the car until the thermostat opened (The thermostat is on the bottom of my engine) I kept topping off the antifreeze. I also kept a jug of anti freeze and water in my car for the next few day. Whenever I got done driving the car and the car cooled off I would check it to see if I needed to top it off. I finally got the air out of it. You could call the vw dealer to see if there is a bleeder on the engine, if so open the bleeder and fill until antifreeze/water comes out, then close the bleeder and top it off to the full level. Just to be safe check the level after you drive the car. Air can still get trapped.
SOURCE: Overheating Polo
this sounds like a thermostat fault, but also could be the sensor switch to the radiator but is more likely the thermostat, it should be located at the front top of engine, follow the top water hose to the engine and you will find the thermostat housing, also just a heads up, these had a problem when first made, according to the known fixes and problems with VW's the hoses corroded inside and started loosing water, this could be wise to get the system presure checked to...hope this helps
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