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Overheating

Tiny
TIMMYTRULOCK
  • MEMBER
  • 1997 CHEVROLET MONTE CARLO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
Have replaced the water pump put 2 different thermostats in it the one in it now is a 160 degree thermostat and hooked up the fans direct got a new radiator and flushed the system. And car still is running hot what do I need to do
Tuesday, November 30th, 2010 AT 4:19 PM

8 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
You need to go back and undo everything you did. All you have done is totally mess up the computer and fuel mixture. That car is SUPPOSED to run hot at idle. It's designed that way. The fans aren't even programmed to come on before about 226 degrees. With that 160 thermostat the computer will not go into closed loop and the mixture will be totally messed up along with you fuel mileage. This is not your old Chevy and cannot be treated like one.
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Tuesday, November 30th, 2010 AT 4:24 PM
Tiny
TIMMYTRULOCK
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  • 5 POSTS
Well we did tis before we even put that thermostat in it it ran hot with no thermostat in it and it don't run hot at idle it runs hot while driving it and after sitting for a while
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Tuesday, November 30th, 2010 AT 7:20 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
You CANNOT run anything but a 195 T-stat in that car or your asking for more trouble.
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Tuesday, November 30th, 2010 AT 7:28 PM
Tiny
TIMMYTRULOCK
  • MEMBER
  • 5 POSTS
Well thats what we had in it first and ran hot still so then we went to the 160
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Tuesday, November 30th, 2010 AT 7:45 PM
Tiny
TIMMYTRULOCK
  • MEMBER
  • 5 POSTS
So if I put the 195 back in it and it runs hot still what do I need to do
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Tuesday, November 30th, 2010 AT 7:48 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
I don't know what your calling hot. It is normal for this engine to see 220 to 222 degrees.
If you had a previous overheating (over 230), you may have a blown head gasket now.
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Tuesday, November 30th, 2010 AT 7:54 PM
Tiny
TIMMYTRULOCK
  • MEMBER
  • 5 POSTS
When I say hot the light comes on and flashes that the engine is hot
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Tuesday, November 30th, 2010 AT 8:05 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
You should have it chemically and pressure tested for a blown head gasket.
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Tuesday, November 30th, 2010 AT 8:24 PM

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