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Unread 03-15-2013, 06:24 PM   #1
BLACK04WJ
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WJ hydro fan

so i have a slight overheating problem and need it fixed.. since once you heat up a WJ.. nothing good happens.

Ive never had a hydro fan so im a little confused by it. It is supposed to always be moving.. mine does not. ive done some tricks to try to make it kick on.. but nothing seems to work.

another thread I found said that if I unplug the ECT sensor between the AC compressor and the alternator the fan should go on full blast as a safety precaution.. I tried this and the fan didnt move. but when i plugged the sensor back in, the fan started going slowly like it should at idle.
these fans DO NOT have a relay. They are controlled by the PCM and have a solenoid.
from all of my research, my guess is that its a bad solenoid... but i want to hear others opinions.

My power steering pump has a tiny tiny leak.. but shouldnt affect it as i have full power. Im going to fix the leak first to 100% rule it out.. but i really doubt its the problem.

thanks

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Unread 03-15-2013, 08:06 PM   #2
team1k
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Hydro fan? Is that a mechanical fan with a hydraulic clutch? Or what is it?
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Unread 03-15-2013, 08:08 PM   #3
BLACK04WJ
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nope lol. its a hydrolic fan runs off the power steering..
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Unread 03-15-2013, 08:11 PM   #4
clgielin
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Quote:
Originally Posted by team1k View Post
Hydro fan? Is that a mechanical fan with a hydraulic clutch? Or what is it?
Some WJ's have a hydraulic driven cooling fan powered by the power steering pump. I have one, but have never had any issues other than upgrading to the new style hose when the original started to leak.
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Unread 03-15-2013, 08:12 PM   #5
clgielin
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Beat me to it...
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Unread 03-15-2013, 08:21 PM   #6
BLACK04WJ
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and yours spins constantly correct, Chris?
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Unread 03-15-2013, 08:22 PM   #7
team1k
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Interesting...so theoretically if you took that off and used an electric one then your power steering power improves or at least doesn't overheat as much?
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Unread 03-15-2013, 10:27 PM   #8
311LJ
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The hydro fans started in 2001 and up. I don't think mine stayed on all the time but it's hard to remember. I just seem to remember I could feel the fan come on some times when I wasn't moving fast (stopping at a light, in a drive through, on a trail ect)

One thing this is they have a very finicky power steering system when leaking. Any bubbles in the system from a leak seem to take out the pump easily. I wonder if you have a bubble stuck in the fan section and it will work it's way out?
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Unread 03-16-2013, 12:42 AM   #9
BLACK04WJ
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from everything I have read, it should spin non stop even at idle. I checked my today and it wasn't moving so I know something is wrong. my power steering has been leaking for a while so I guess I should start with that. how hard are they to replace? didn't you just help someone do it, John?
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Unread 03-16-2013, 12:44 AM   #10
311LJ
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yeah I replaced the return line on mine and same line and pump on a friends a week ago. its not difficult as long as you MAKE SURE you do not cross thread the hose when you attach it to the top of the pump. its VERY easy to do.
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Unread 03-16-2013, 12:49 AM   #11
BLACK04WJ
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do you happen to remember how much your friend paid for the pump and line?
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Unread 03-16-2013, 01:02 AM   #12
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he went to autozone. the line was like 25-30 and I think pumps are 50-80 range with a core charge. Also they have a plastic pulley so make sure you have the correct style of pulley puller or just buy a new pulley (around 15$)

I just realized why i noticed my fan running on my wj. most people wouldn't notice a fan kicking on but apparently my fan did not spin either and never came on. I had my pump replaced by a shop and that is when I noticed my fan started coming on (or at least jumping to a higher speed) when slow or stopped. So possibly it wasn't working properly before the pump replacement. just a thought.
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Unread 03-16-2013, 03:13 AM   #13
team1k
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I have the pulley puller/install tool if you need help with that part
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Unread 03-16-2013, 03:30 AM   #14
team1k
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Oh and I just checked and I have this system too. Poop.

Mine spins on startup/idle
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