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1990 Firebird V6 engine temp

Tiny
FLAMENBIRD87
  • MEMBER
  • 1990 PONTIAC FIREBIRD
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
What is the eng temp to be at normal operating speed, after warm up. And recomended thermostat temp?
Thursday, January 13th, 2011 AT 12:34 AM

5 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
It has a 195 thermostat and it will usually maintain that when cruising but in slow traffic situations it may run hotter because the electric fan is programmed to come on higher temp than that.
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Thursday, January 13th, 2011 AT 12:48 AM
Tiny
FLAMENBIRD87
  • MEMBER
  • 45 POSTS
Would a lower temp cause it to run bad such as idle rough. My car runs at normal temp about 160 if it sits and idles for more than 5 min in traffic the temp will rise to almost 200 and the fan will kick on. But if the temp is to low at normal driving would that make it run rich and idle a little rough?
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Thursday, January 13th, 2011 AT 6:52 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Yes, it is possible although I don't know if that is the case with yours or not. Many GMs will go into open loop when the temp drops below a specific threshhold.
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Thursday, January 13th, 2011 AT 7:19 PM
Tiny
FLAMENBIRD87
  • MEMBER
  • 45 POSTS
I will change the thermostat to a 195 and go from there. Thanks for the info.
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Friday, January 14th, 2011 AT 12:27 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Good plan.
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Friday, January 14th, 2011 AT 12:31 AM

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