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rad fan?

 
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Impala_03
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PostPosted: Tue Aug 05, 2014 12:27 am    Post subject:  rad fan? Reply with quote

I think the driver side fan is going bad since the passenger side is coming on more and more often and the fan is vibrating hard (I can feel it from the inside of the car it's that bad)

both come go on "highest mode" as well works fine in highest mode



while it was slowing down the fan was wobbling hard when I shut off the engine

just the other night I was close to overheating 3rd line it was kinda humid but only 78F outside

tell the auxiliary fan came on then it went to normal but the auxiliary fan stayed on though




should I just buy a used one and swap out the fans from the passenger side?

since the driver side is used all the time.


if I not moving that temp tends to go up to almost the 3rd line that is when the auxiliary fan kicks on
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98ss
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PostPosted: Tue Aug 05, 2014 6:17 pm    Post subject:   Reply with quote

Yes definitely replace the fan. Better to do that than have the fan puncture something when the blades go
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Frank
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PostPosted: Tue Aug 05, 2014 6:29 pm    Post subject:   Reply with quote

I forget the year cutoff, but I believe 00-03 doesn't have replaceable fan motors (you have to replace the whole assembly). I'm pretty sure you can replace just the motors on the 04-05 assembly, but it mounts differently as the radiator is completely different from the earlier years.

The aftermarket Dorman assembly has replaceable fan motors and a LLT warranty...runs about $200 locally though and less online.

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Impala_03
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PostPosted: Wed Aug 06, 2014 6:22 pm    Post subject:   Reply with quote

Frank wrote:
I forget the year cutoff, but I believe 00-03 doesn't have replaceable fan motors (you have to replace the whole assembly). I'm pretty sure you can replace just the motors on the 04-05 assembly, but it mounts differently as the radiator is completely different from the earlier years.

The aftermarket Dorman assembly has replaceable fan motors and a LLT warranty...runs about $200 locally though and less online.


it does not always vibrate might just need some oil on the bearings ?
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PostPosted: Thu Aug 07, 2014 11:12 am    Post subject:   Reply with quote

Impala_03 wrote:
Frank wrote:
I forget the year cutoff, but I believe 00-03 doesn't have replaceable fan motors (you have to replace the whole assembly). I'm pretty sure you can replace just the motors on the 04-05 assembly, but it mounts differently as the radiator is completely different from the earlier years.

The aftermarket Dorman assembly has replaceable fan motors and a LLT warranty...runs about $200 locally though and less online.


it does not always vibrate might just need some oil on the bearings ?


Oil can fix a squeak, not a vibration

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Frank
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PostPosted: Fri Aug 08, 2014 1:36 am    Post subject:   Reply with quote

If it's vibrating, I guess that it is possible that the fan blade is out of balance but it would take some disassembling and ingenuity to get it fixed. However it could very well be an issue with the motor bearings or something else that requires replacement.

I believe you can get the fan motors to come on all the time by unplugging the coolant temp sensor so that might be a good place to start diagnosing what the actual issue is unless you are making jumper wires in the relay terminals for the fans to turn them on.

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ScottMPala
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PostPosted: Tue Aug 12, 2014 9:47 pm    Post subject:   Reply with quote

you can purchase the HD version with two big fans for $100 or less at a parts store. I remember thinking that the fans might be removable for my 03, but its been several years since i did that. I just bought the HD fan and kept it moving

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PostPosted: Fri Aug 15, 2014 7:29 am    Post subject:   Reply with quote

Frank wrote:
If it's vibrating, I guess that it is possible that the fan blade is out of balance but it would take some disassembling and ingenuity to get it fixed. However it could very well be an issue with the motor bearings or something else that requires replacement.

I believe you can get the fan motors to come on all the time by unplugging the coolant temp sensor so that might be a good place to start diagnosing what the actual issue is unless you are making jumper wires in the relay terminals for the fans to turn them on.

n the temps are ok just slightly lower then normal just a hair below the middle.. and just a hair above normal when idling at a stop.
typical
it's normally in the middle

when both fans turned on it was at the larger 3rd mark on the needle




this?
http://www.ebay.com/itm/CHEVY-.....mp;vxp=mtr



I did add some coolant since it was dry


that may have been part of the issue 100+ F heat will make quick work of a small puddle of water.
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Frank
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PostPosted: Fri Aug 15, 2014 3:59 pm    Post subject:   Reply with quote

Yep, that's the right fan assembly. You shouldn't be losing coolant if the system is working properly (not leaking).

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PostPosted: Fri Aug 15, 2014 7:51 pm    Post subject:   Reply with quote

Frank wrote:
Yep, that's the right fan assembly. You shouldn't be losing coolant if the system is working properly (not leaking).



it has the
typical leaks of a 3800 II engine.
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Frank
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PostPosted: Sat Aug 16, 2014 2:29 am    Post subject:   Reply with quote

Impala_03 wrote:
Frank wrote:
Yep, that's the right fan assembly. You shouldn't be losing coolant if the system is working properly (not leaking).



it has the
typical leaks of a 3800 II engine.

Well, what are you waiting for? Replace the upper and lower intake manifold gaskets, the coolant elbows, and the water pump while you are in there! Wink

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PostPosted: Sat Aug 16, 2014 9:35 am    Post subject:   Reply with quote

Frank wrote:
Impala_03 wrote:
Frank wrote:
Yep, that's the right fan assembly. You shouldn't be losing coolant if the system is working properly (not leaking).



it has the
typical leaks of a 3800 II engine.

Well, what are you waiting for? Replace the upper and lower intake manifold gaskets, the coolant elbows, and the water pump while you are in there! Wink



probably be cheaper to find a car that has already been fixed
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