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Fan not going on upon 1st start

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Old Aug 23, 2011 | 11:12 PM
  #1  
Dmans85's Avatar
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From: Elberta, AL
Car: '85 Z28
Engine: LS1
Transmission: T56
Axle/Gears: 3.23 posi
Fan not going on upon 1st start

Is it a sticky/stuck thermostat? Lately the fan will not kick on the first start of the dayeven when temp goes past 190. Temp will climb to 220 and beyond and fan won't start spinning. If I shut off the car and restart, they it goes on and temp drops appropriately. I never used to see the needle past the first line very long.
What gives?
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Old Aug 24, 2011 | 05:07 PM
  #2  
Stevolwevol's Avatar
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From: Michigan
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI
Re: Fan not going on upon 1st start

Originally Posted by Dmans85
Is it a sticky/stuck thermostat? Lately the fan will not kick on the first start of the dayeven when temp goes past 190. Temp will climb to 220 and beyond and fan won't start spinning. If I shut off the car and restart, they it goes on and temp drops appropriately. I never used to see the needle past the first line very long.
What gives?
So the fan doesn't come on at 220, and it will after you shut it off and restart?
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Old Aug 24, 2011 | 11:27 PM
  #3  
Dmans85's Avatar
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From: Elberta, AL
Car: '85 Z28
Engine: LS1
Transmission: T56
Axle/Gears: 3.23 posi
Re: Fan not going on upon 1st start

Strange huh. But yes that is what has occurred on three occasions
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Old Aug 25, 2011 | 02:13 AM
  #4  
Stevolwevol's Avatar
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From: Michigan
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI
Re: Fan not going on upon 1st start

You may have a bad fan switch, and or a bad connector to the fan switch.
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Old Aug 25, 2011 | 10:38 PM
  #5  
Dmans85's Avatar
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Posts: 328
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From: Elberta, AL
Car: '85 Z28
Engine: LS1
Transmission: T56
Axle/Gears: 3.23 posi
Re: Fan not going on upon 1st start

That's a start. I'll look to find these two this weekend. thanks
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