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My car is overheating on the street not in freeway

Tiny
ASEMEKON
  • MEMBER
  • TOYOTA CAMRY
My car is toyota camry 1994, 4 cyl. With 142, 00 mileage. My car was overheating and my mechanic has changed the cylinder head, the radiator, the termostat and finally the water temprature sending unit few days ago.I still observe that when I am on freeway the car does not overheat and runs ok but, when I am on the street the temprature guage start rising up. If switch on A/C IT DOES NOT OVERHEAT. I parked my car with engine on for a while to see what is happening, and what I observed is that the fan kicks in just for few seconds after the temprature has risen above 3/4 on the dash board. What is the real problem of this car?Is there any way to fix it?
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Saturday, September 15th, 2007 AT 12:14 PM

2 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Sounds like you may have a pocket of air trapped.
Remove the t-stat and take the little plug out of the ring. Lift the front of the vehicle until the rad cap was higher then the fill cap. Remove the upper radiator hose and fill the cooling system through the radiator slowly until coolant comes out the upper hose. Close the system and run at a higher idle (2500 rpm or so).
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Saturday, September 15th, 2007 AT 1:56 PM
Tiny
FISHERMAN
  • MECHANIC
  • 937 POSTS
Thats a good answer, but the easy way its to Have some hot water ready and disconnect the upper hose on the radiator Lift the hose and pour the hot water on it, That way the water opens the thermostat and let the water in on the motor and purge the air trapped inside the engine (which its making a false reading on the sensor and because of that the fan its actuating that late)

Hope it helps.

Best regards.
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Monday, September 17th, 2007 AT 2:49 PM

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