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Help overheating!!!

 
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Old 08 Aug 2011, 11:53 am
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Default Help overheating!!!

New to the site!!!! This site has been a wealth of knowledge for us though. We replaced the head gasket and had the head milled because it was warped on my 2001 cruiser. The car is running perfectly in time, but we are still having problems with it overheating. It doesn't overheat at all if you are moving but as soon as you are idle then the overheating begins. The fan isn't kicking on. We have checked the relays that isn't the problem. The fan is running when we force it to but it will not kick on by itself. Anyone have any suggestions.
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Old 08 Aug 2011, 12:07 pm
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Default Re: Help overheating!!!

my sugestion is simple get a new fan put it in they go for about $90 on ebay now if you are saying well ours works when we force it to then the fan may be ok and the relays are bad eityher way a head job is way higher than a new fan and or the relays---we have had some on this site change realy after relay when it would ahve saved them time and money to just change the fan
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Old 08 Aug 2011, 12:11 pm
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Default Re: Help overheating!!!

Welcome to the Forums.
What year/model? After '06 and turbo models behave differently....
Some are controlled by the computer and not relays.
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Old 08 Aug 2011, 12:23 pm
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Default Re: Help overheating!!!

We've done a new head job and we've replaced relays. Since we are able to force the fan we believe it is ok. So we are thinking maybe the wiring to the fan or the temperature sensor. Anymore suggestions? It's a 2001 by the way.
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Old 08 Aug 2011, 02:31 pm
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Default Re: Help overheating!!!

2001 used relays.
You may have lost 1 speed on the fan - it happens - when idling, and you turn on A/C, does fan come on? I believe that's a separate circuit, and may give you another clue.
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Old 09 Aug 2011, 09:22 am
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Default Re: Help overheating!!!

There are two differet relays. One for high and one for low right? We have changed both. Still not able to get the fan to come on. The A/C isn't charged so we can't turn it on. The lines were bled when they reworked the motor. We also put on a new Temp sensor last night. Nothing. Anymore ideas?
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Old 09 Aug 2011, 10:13 am
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Default Re: Help overheating!!!

There's only a couple things it could be and you said you changed the ETC (Engine Coolant Temp)Sensor, Relays and the Fan itself. So that leaves the wiring, electrical connections (especially the one about 10 inches from the fan motor) and the computer (PCM) which turns the fan on when the A/C is on and receives signals from the ETC to know which speed to turn on.

There's 2 fuses for the 2001 also, check them.

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Last edited by CREWZIN; 09 Aug 2011 at 10:16 am.
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Old 09 Aug 2011, 12:21 pm
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Default Re: Help overheating!!!

Would the fan be able to run if we forced it off of the battery if the fuse was bad?
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Old 09 Aug 2011, 01:38 pm
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Default Re: Help overheating!!!

Depends on the way you forced it. Direct voltage right to the wires of the motor through the electrical connection (which is the one I told you to check) is the way I was telling everyone to test the fan, no fuse needed.
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Old 09 Aug 2011, 03:25 pm
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Default Re: Help overheating!!!

Quote:
Originally Posted by Kblevins View Post
There are two differet relays. One for high and one for low right? We have changed both. Still not able to get the fan to come on. We also put on a new Temp sensor last night. Nothing. Anymore ideas?
Where did you find the HIGH speed fan relay??? How hard was it to repolace the temp sensor?? My sensor is on the back side of the thermostat housing towards the motor. Does not seem any easy way to reach it.
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