2000 Pontiac Grand Prix Normal Operating Temperature

2000 PONTIAC GRAND PRIX
70,000 MILES • 6 CYL • FWD • AUTOMATIC
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DFCRAM98
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Since having my care repaired due to a "Service Engine Soon" light warning, my temp guage reads much higher than it did before(no matter what the driving conditions. It consistently registered around the large mark between the 160 & 210 mark(for about 9 years)Now it registers at or above 210 after only a few minutes on the road(not at high speeds). I am being told that my engine was actually running way too cool all these years and is now running at a normal temperature. They replaced a temp sensor & a thermostat which actually stuck & overheated so i had to take it back today. So what is the normal temp guage reading for a 2000 Pontiac Grand Prix GT?

Dfcram98
Feb 4, 2010 at 1:24 PM
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TOOOMANYTOYS
  • ✓Experienced Mechanic
  • 513 POSTS
It should be around 210 to 220. Are the fans coming on when the vehicle is at operating temperature.
Feb 4, 2010 at 1:29 PM
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DFCRAM98
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[quote:569cb8a896="tooomanytoys"]It should be around 210 to 220. Are the fans coming on when the vehicle is at operating temperature.[/quote:569cb8a896]

The fans are coming on. But why is it now running
hotter than before after the thermostat & it's sensor
was replaced?

Dfcram98
Feb 4, 2010 at 1:49 PM
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TOOOMANYTOYS
  • ✓Experienced Mechanic
  • 513 POSTS
If the thermostat was worn, it allows coolant to flow through at lower temperatures. Which would cause an overcooling concern. The thermostat acts as a temperature regulator when working correctly
Feb 4, 2010 at 11:38 PM
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DFCRAM98
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[quote:91de465c2a="tooomanytoys"]If the thermostat was worn, it allows coolant to flow through at lower temperatures. Which would cause an overcooling concern. The thermostat acts as a temperature regulator when working correctly[/quote:91de465c2a]

Thanks for all your help! I now have to tell myself that
everything is okay when i see a higher reading on my
temp guage. Again, thanks!
Feb 5, 2010 at 4:15 AM
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