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Check your heat shield by the catalytic converter, and the strap around the muffler. The heat shield has a tendency to come loose, and the strap rusts on almost every 3rd gen cavalier I've ever seen
why does my 2002 chevy cavalier over heat after i change the thermostat and the water pump
thermostat
Check your coolant level.
under the heat shield. remove the heat shield and it will be sticking out right above the exhaust headers.
The factory puts the shield there for a reason.
Muffler Heat Sheild
The heat shield on a 2005 Sunfire can be removed by taking out the retaining bolts. The gas tank can then be lowered from the vehicle.
You can do it if you remove the heat shield it works.
Remove the air inlet duct tube. Remove the heat shield from the exhaust and move it out of the way. Unbolt the crossover exhaust pipe bolts from the from the front exhaust pipes move it out of the way. Unbolt the thermostat housing pipe and remove the thermostat. Installation is reverse.
try looking at your resistor pack on the passsenger side lower the blower motor down and there is a heat coil and resistor in there
Exhaust components rust out over time due to weather and the heat from the vehicle. On a 2001 Chevy Cavalier, when the muffler strap rusts, welding a new strap in its place will offer a complete and reliable repair.