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I have a 95 Grand Am quad 4

Tiny
JAMES95GA
  • MEMBER
  • 1995 PONTIAC GRAND AM
  • 130,000 MILES
. At idle the temp goes up. Fast to almost red then once moving it cools down within a mile. Why. Cooling system was drained and refilled I did think air was trapped but being told its not that.
Thursday, November 17th, 2011 AT 7:35 PM

9 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
The coolant flow through the radiator is faster at higher rpms. I'd have to double check the temp gage using an infra-red temp gun. Was the cooling sustem flushed?
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Friday, November 18th, 2011 AT 5:14 PM
Tiny
JAMES95GA
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  • 4 POSTS
No just drained not flushed I was thinking this weekend I would at least flush the radiator
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Friday, November 18th, 2011 AT 7:00 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
It might not be a bad idea to flush the whole system. I realize you lose all your antifreeze. You need to safely dispose of the old antifreeze.
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Friday, November 18th, 2011 AT 7:39 PM
Tiny
JAMES95GA
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  • 4 POSTS
Should I change the thermostat or temp control unit. Or just flush and see.
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Friday, November 18th, 2011 AT 8:18 PM
Tiny
JDL
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Has the thermostat ever been changed? I'd change that also. Is the radiator fan working? Any applicable trouble codes?
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Friday, November 18th, 2011 AT 8:57 PM
Tiny
JAMES95GA
  • MEMBER
  • 4 POSTS
No codes and I honestly don't know if it has ever been changed I bought it a month ago barely running for next to nothing and figured if I couldn't make it run I could get my money back in scrap. Runs pretty good now did timing chain, and most of the electrical units and coil tower, plugs. Etc. Radiator had to be drained while I did the timing. Original problem was it would not accelerate. Went fine very slow. Now it is doing this heating thing and shakes a little in reverse for some reason.
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Friday, November 18th, 2011 AT 9:04 PM
Tiny
JDL
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Is the radiator fan running? 95 is a cross-over year, you may have a hybrid datalink connector? You may need a special code reader for that. I don't have one.
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Friday, November 18th, 2011 AT 10:02 PM
Tiny
JAMES95GA
  • MEMBER
  • 4 POSTS
The fan is running fine.
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Friday, November 18th, 2011 AT 11:16 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Can't think of anything else at the moment.
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Monday, November 21st, 2011 AT 8:24 PM

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