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Engine cooling fan not coming on?

Tiny
JOSEVALDEZ
  • MEMBER
  • 2002 CHEVROLET MALIBU
  • 100,700 MILES
No pressure in the coolant fan hoses upper or lower fan does not come on coolant comes out thru the radiator reseivor when coolant gets to normal temperature what can be causing the problem
Saturday, November 17th, 2012 AT 3:20 AM

16 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
It is overheating. check the thermostat and lets go over these guides to walk us through the steps to fix it.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

and

https://www.2carpros.com/articles/replace-thermostat

Please run down these guides and report back.

Roy
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Saturday, November 17th, 2012 AT 3:22 AM
Tiny
JOSEVALDEZ
  • MEMBER
  • 2 POSTS
No coolant pressure in the coolant fan hoses upper or lower coolant comes out thru the coolant reservoir I replace the thermostat and radiator cap and cooling fan motor and it seems to be fixed :) the guides really helped me. The fan comes on now.
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Saturday, November 17th, 2012 AT 3:42 AM
Tiny
JOSE55P
  • MEMBER
  • 15 POSTS
  • 2001 CHEVROLET MALIBU
  • 162,000 MILES
Have to carry water cause it spills out and gets hot
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds like it is overheating. If the leak is from the cap, replace it and fill the coolant and see what happens.
If the tank is leaking, replace it, fill it and see.
Otherwise you may have have a bad thermostat and if you overheated it badly enough, you may have done internal engine damage.

Roy
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
JOSE55P
  • MEMBER
  • 15 POSTS
Thank you, appreciate your help. Will look into both cap and tank.
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good luck
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If I were you stay in your original post they're other experts here to help -You should have mentioned that your fans are not coming on
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
JOSE55P
  • MEMBER
  • 15 POSTS
Ok thanks
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
ALPHELIA2002
  • MEMBER
  • 1 POST
To Jose I have been having the same problem, I have replaced the tank and the hoses and the water pump and it is still running hot every now and then. Please let me know what worked for you.
Thank You in Advance.
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be airlock in the system -try bleeding it out and see what happens
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
FERTORRES13
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET MALIBU
  • 3.1L
  • V8
  • 2WD
  • AUTOMATIC
  • 184,968 MILES
My reservoir starts to leak coolant when engine gets hot and usually does it after I turn it off. Sometimes it sounds like the coolant is boiling on the reservoir and in the back of the engine close to the transmission my passenger side coolant fan is not turning on. I replace the fans motor and replaced the fuses and relays still doesn't turn on and I put in a new thermostat after flushing out all of the old coolant and flushed out the radiator still leaking coolant through reservoir radiator has no radiator cap so I opened the line on top of the water pump to let out any air it might of had in the system.
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Any cooling system trouble codes? To check codes yourself, at the least, you need an obd2 code reader. Some of the national brand autostores will check codes for free.

How hot does the engine get in degrees F? The low speed fan comes on about 223 degrees F, the high speed comes on about 230 degrees F. Also, when you turn on ac, the fans may take off. Did you check voltage and ground at the fan/s wiring connector for the fan that doesn't work?

If your reservoir is faulty, replace it.

Check for combustion gases in the coolant?
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Wednesday, October 28th, 2020 AT 6:15 PM (Merged)
Tiny
TBMC
  • MEMBER
  • 2 POSTS
  • 2002 CHEVROLET MALIBU
Engine Cooling problem
2002 Chevy Malibu 6 cyl Front Wheel Drive Automatic

my fans work when I turn on the air condtioning but do not work when engine over heats what do you think could wrong? Does the pcm have to be reprogramed?
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Saturday, October 31st, 2020 AT 10:47 AM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check the underhood fuse block for the fan relays, I think there are three altogether. One of em could be no good.
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Saturday, October 31st, 2020 AT 10:47 AM (Merged)
Tiny
TBMC
  • MEMBER
  • 2 POSTS
How do you check the relays to see if they are bad?
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Saturday, October 31st, 2020 AT 10:47 AM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS


https://www.2carpros.com/forum/automotive_pictures/62217_Fansa_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Fansb_2.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Fansc_2.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Fansd_1.jpg

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Saturday, October 31st, 2020 AT 10:47 AM (Merged)

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