* Faulty Gauge or Wiring: The problem might not be the engine overheating at all, but rather a faulty temperature gauge or a problem with the wiring leading to it. A short circuit or a break in the wiring could cause the gauge to read incorrectly. Test the gauge with a multimeter to see if it's getting the correct signal.
* Water Pump: A failing water pump might not be able to circulate coolant effectively, leading to localized overheating even if the overall engine temperature isn't dramatically high. Check for leaks around the pump and listen for unusual noises (whining or gurgling).
* Radiator: A clogged or damaged radiator might restrict coolant flow, causing overheating. Inspect the radiator carefully for any damage, leaks, or blockages. Consider pressure testing the radiator to check for leaks.
* Coolant Flow Restriction: Something might be obstructing coolant flow somewhere in the system – a partially blocked hose, a restricted heater core, or even a buildup of sediment inside the engine block or radiator.
* Head Gasket: A blown head gasket is a serious possibility. This allows coolant to leak into the cylinders or oil, which wouldn't necessarily cause immediate overheating symptoms, but could lead to the gauge falsely reporting high temperatures. Check for signs of coolant in the oil or exhaust (white smoke). A compression test might be needed to diagnose this accurately.
* Thermostat Housing: While you replaced the thermostat, ensure the thermostat housing itself isn't cracked or warped, preventing proper coolant flow.
* Air Pockets: Air trapped in the cooling system can prevent proper heat transfer. Make sure the system is properly bled of air after any work on the cooling system.
What to do next:
1. Verify Gauge Accuracy: The absolute first step is to confirm the gauge reading is inaccurate. Use an infrared thermometer to measure the temperature of the engine block and radiator hoses. Compare those readings to the gauge.
2. Pressure Test the Cooling System: This will identify leaks that might not be readily visible.
3. Inspect the Entire Cooling System: Carefully examine all hoses, clamps, the radiator, the water pump, and the thermostat housing for any signs of damage, leaks, or blockages.
4. Check for Coolant Leaks: Look for signs of coolant leaks under the car, around the engine, and in the overflow tank.
5. Consider Professional Help: If you're not comfortable performing these checks yourself, it's best to take your Camaro to a qualified mechanic for a proper diagnosis. A blown head gasket is a significant repair, and misdiagnosis can lead to further damage.
Ignoring an overheating problem can lead to severe engine damage. Thoroughly investigating the cause is crucial.
