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1992 Acura Legend LS coupe is overheating but the heator not blowing hot there a little smoke out tailpipe only when temperature has gone beyond normal range?

Here are some areas to check, when you car overheats and shows white smoke from tailpipe:

1. Coolant Level:

- Check the coolant level in the reservoir. If the reservoir is low, add the appropriate coolant.

- Check for leaks in the cooling system by visually inspecting hoses, pipes, and connections for signs of leakage.

2. Cooling System Functioning:

- Check the thermostat to see if it's stuck closed, preventing coolant from circulating.

- Make sure the radiator and the condenser (if the vehicle has air conditioning) are free from debris and have good airflow.

- Check that your radiator fan is working properly and turning on when reaching a certain engine temperature.

3. Water Pump:

- Inspect the water pump to ensure that it's functioning correctly and circulating the coolant.

4. Faulty Head Gasket:

- A blown head gasket can cause both overheating and white smoke from the tailpipe as coolant seeps into the combustion chambers.

5. Overfilled Engine Oil:

- White smoke can be a result of excess engine oil entering the combustion chamber, causing it to burn. Inspect the oil level to make sure it's within the recommended range.

6. Engine Condition:

- If your car has a lot of miles on it, the engine may be worn, allowing oil to seep into the combustion chamber.

7. Exhaust System Issues:

- In some cases, a faulty exhaust system component like the catalytic converter or a leak in the exhaust manifold can cause white smoke.

Since overheating can lead to serious engine damage, it's important to stop driving and have the vehicle diagnosed if the temperature gauge shows consistent high readings or you are experiencing overheating symptoms. It is recommended that you seek the assistance of a professional mechanic to properly diagnose and repair the problem.