Overheating

Tiny
KEITHMORENZ
  • MEMBER
  • 2001 ACURA TL
  • 3.2L
  • V6
  • FWD
  • AUTOMATIC
  • 180,000 MILES
Car just started overheating. I put coolant in the radiator to correct level. Drive for an hour and it it boils and sprays out of overflow reservoir. I changed out the radiator cap and put put a new thermostat in (a fail safe one). It does not over heat as much, but still does. Maybe two to three days now I have to put more coolant.
I checked the oil and no water is in it at all.
The water pump does not make any sounds to indicate it is bad.
The heater works fine with no smell of antifreeze.
It does not leak anywhere except when it spays out of the overflow reservoir.
Any suggestions on what could be causing the overheating?
Thank you, Keith
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Tuesday, January 31st, 2017 AT 9:26 AM

2 Replies

Tiny
HMAC300
  • EXPERT
First fill coolant then pressure check for a head gasket leak you can also by a chemical tester at auto parts. Also, when engine is warm, stop engine, disconnect radiator fan and check radiator for cold spots if any the radiator is bad.
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Tuesday, January 31st, 2017 AT 9:30 AM
Tiny
STEVE W.
  • EXPERT
Do the cooling fans come on before it overheats? If they are not operating it could cause the engine to overheat. Usually this shows up as an overheating issue while stopped in traffic or moving slow and the temperature appears normal while at speeds over forty five mph or so.

If the fans are operating and the overheating is still occurring it could be a failing head gasket. To test that you put a pressure test unit on it while cold. Start the engine and watch the pressure. It should stay close to zero until the engine actually warms up. If you see the pressure start to jump up as soon as you start the engine you are seeing a bad head gasket. To verify that you can put a combustion gas detection kit on the radiator and watch the fluid to see if it turns color (blue to yellow). If it does you have confirmed the problem. Both of those tools can usually be rented/borrowed from an Autozone, Advance, O'Reilly type store. In most of them you actually "buy" the tool and when you return it in the same condition you get the money back.
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Tuesday, January 31st, 2017 AT 11:48 AM

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