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2000 impala heating/cooling fan issue
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944nate
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PostPosted: Sat Dec 17, 2011 1:27 pm    Post subject:  2000 impala heating/cooling fan issue Reply with quote

The heater in my 3.4 impala recently started giving me a problem as it was taking too long to warm up,15-20 min before i got heat.More recently the heat seems to have quit all together and wants to try to run hot.The t-stat seems to be opening and letting water thru the top hose as normal.Also i noticed my cooling fans took a very long time to come on so i wiggled the wires and tapped on them and the relays and when it did the primary fan made a loud screeching sound which i have never heard before.Sounds as if i have more than one problem as winter starts setting in,any help on either problem is greatly apprecciated!Thanks
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chibiblacksheep
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PostPosted: Sat Dec 17, 2011 2:32 pm    Post subject:   Reply with quote

Last time the coolant was flushed?

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944nate
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PostPosted: Sat Dec 17, 2011 4:31 pm    Post subject:   Reply with quote

not since ive had it,maybe a good idea .ill try that and go frm there.
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98ss
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PostPosted: Sun Dec 18, 2011 1:33 pm    Post subject:   Reply with quote

The t-stat could be sticking open. Its not as easy to get to as the 3.8, but it can be done. Eventualy, if the t-stat isn't working correctly the car will show an engine light with the p0128 code (if my memory serves me correctly) and you will have to change it out anyway. So if your going to swap the coolant out, change the t-stat while your at it. You will have to remove the crossover pipe to get at it, so my suggestion would be to soak the exhaust studs down with pb blaster and wire brush the crap out of them.
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944nate
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PostPosted: Sun Dec 18, 2011 2:00 pm    Post subject:   Reply with quote

ok,flushed system,changed t-stat (without removing crossover pipe) .Heat seems to work as it should.However cooling fans are not coming on.I used jumpers straight to the battery and the primary worked fine,nothing from the pass side,how about the coolant temp sensor?Could that be the problem?
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VictoryRed09
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PostPosted: Sun Dec 18, 2011 8:46 pm    Post subject:   Reply with quote

944nate wrote:
ok,flushed system,changed t-stat (without removing crossover pipe) .Heat seems to work as it should.However cooling fans are not coming on.I used jumpers straight to the battery and the primary worked fine,nothing from the pass side,how about the coolant temp sensor?Could that be the problem?


If I am remembering right, The passenger side fan turns on when the AC compressor kicks in.
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944nate
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PostPosted: Sun Dec 18, 2011 8:53 pm    Post subject:   Reply with quote

ok both are finally working on there own,Does anyone know if the fans from an 03 9c1 plug into my 2000 base 3.4?
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chibiblacksheep
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PostPosted: Mon Dec 19, 2011 10:10 am    Post subject:   Reply with quote

944nate wrote:
ok,flushed system,changed t-stat (without removing crossover pipe) .Heat seems to work as it should.However cooling fans are not coming on


Glad to hear the heat is working.

Cooling fans don't kick on until about 212 degrees, or if the AC is running.

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944nate
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PostPosted: Thu Dec 22, 2011 7:11 pm    Post subject:   Reply with quote

ok looks like we are overheating again,to the red with no fans!!!WTF!New thermostat,rad. cap,full flush,full of the right amount water/antifreeze,proper air bleeding done!Any ideas?
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98ss
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PostPosted: Fri Dec 23, 2011 3:17 pm    Post subject:   Reply with quote

Does the temp go to the red if the car is not moving, or is it when you are driving? I know that you said you bled out all of the air, but I would give it another try. Sometimes you think you got all of the air out, but there is a pocket somewhere that doesn't want to move (if you have ever had the experience of burping a cavalier its a real pain). If that doesn't work, replace the radiator cap.
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944nate
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PostPosted: Fri Dec 23, 2011 3:27 pm    Post subject:   Reply with quote

when i am driving it and sittting still,already has a new cap.
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98ss
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PostPosted: Fri Dec 23, 2011 5:49 pm    Post subject:   Reply with quote

944nate wrote:
when i am driving it and sittting still,already has a new cap.


I saw the new cap and tried to go back and edit, it wouldn't let me. I suppose your water pump could be fragged, but I doubt it. When it gets hot, does it go back down then up and down on the temp guage? I still think you have some air in there.
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944nate
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PostPosted: Fri Dec 23, 2011 6:48 pm    Post subject:   Reply with quote

No it seems to stay hot until i turn it off,no fluctuation at all.It seems to be holding the coolant good,and havent noticed any leaks.
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98ss
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PostPosted: Fri Dec 23, 2011 7:00 pm    Post subject:   Reply with quote

With the temp in bama being 50-60's the car shouldn't overheat when driving. With the car cold, take the rad cap off and start the car up. Put a drain pan under the radiator fill neck. Let the car heat up and wait for the t-stat to open, I bet you will find some air in the system.

What I meant by the water pump is (I have only seen this once) the vanes inside the pump don't spin with the pump so no fluid is being moved.
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944nate
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PostPosted: Fri Dec 23, 2011 8:15 pm    Post subject:   Reply with quote

I will try that sometime in my busy weekend,i hope it fixes it i need the mpg's
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