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Unread 10-18-2013, 07:07 AM   #16
modernblueWK
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Join Date: Jan 2010
Location: Gunnison, CO
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Does anyone know the cfm rating of the stock electric fan?

Im thinking it would be nice not to hear the roar of the fan when its freezing outside.

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Unread 10-18-2013, 07:12 AM   #17
overland-wk
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Join Date: Apr 2013
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His grand cherokee had two fans electric and mechanical fan we just took off the mecanical fan and still has the electric on. It never overheated it always stayed at normal temperature. And no i wont start a thread about an 08 gc overheating cause if it was i would just put it back on.
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Unread 10-18-2013, 08:27 AM   #18
jay-h
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Here is a good rule of thumb. A fan and clutch cost a good chunk of money. You can be pretty sure it would not be there if the engineers could get away without it. So, I would say that yes, the factory electric is not enough on its own.
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Unread 10-18-2013, 08:38 AM   #19
paroxysym
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Quote:
Originally Posted by jay-h View Post
Here is a good rule of thumb. A fan and clutch cost a good chunk of money. You can be pretty sure it would not be there if the engineers could get away without it. So, I would say that yes, the factory electric is not enough on its own.
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Unread 10-18-2013, 08:55 AM   #20
caulk04
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2008 WK 
 
Join Date: Jan 2013
Location: Greenville, Pennsylvania
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In the Dakota, the PCM kicks the fan on at 210º coolant temp. The temp sender is on the outlet of the engine. Monitoring the PCMs temp signal showed that the engine ran no more than 10º hotter when simply removing the clutch fan. Fixing the non-problem brought it right down to where it was before hand.

For normal driving, the clutch fan is not needed. It's there for towing, extreme ambient temp and low speed service. All of these circumstances are ones that I would recommend putting it back on. Not sure of space available with the WK fan shroud, but it took all of 2 minutes to put it back on my Dakota.

Bottom line, if you don't want to do it, don't. Don't crucify this guy because he did.
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Unread 10-18-2013, 10:08 AM   #21
overland-wk
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Quote:
Originally Posted by caulk04 View Post
In the Dakota, the PCM kicks the fan on at 210º coolant temp. The temp sender is on the outlet of the engine. Monitoring the PCMs temp signal showed that the engine ran no more than 10º hotter when simply removing the clutch fan. Fixing the non-problem brought it right down to where it was before hand.

For normal driving, the clutch fan is not needed. It's there for towing, extreme ambient temp and low speed service. All of these circumstances are ones that I would recommend putting it back on. Not sure of space available with the WK fan shroud, but it took all of 2 minutes to put it back on my Dakota.

Bottom line, if you don't want to do it, don't. Don't crucify this guy because he did.
Thanks

Im sure if the hemi can do with out one the 4.7 can too.
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Unread 10-18-2013, 04:50 PM   #22
R4TCHET
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2005 WK 
 
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I think I read somewhere that if you don't have to tow package it doesn't come with the clutch fan. It really only does anything if you are towing a lot, I even have towed without the clutch fan and it was no problem. I still have my old clutch fan in my garage and can install it at any point in time. Now I wouldn't tow a huge amount long distances or in lots of stop and go driving without the clutch fan but my wk runs fine without the clutch fan I used to off-road 3-4 times per week during the summer on some pretty taxing trails and the engine would never go higher than if it had the clutch fan on anyways.

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Unread 10-19-2013, 07:13 AM   #23
Goldenknob
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2007 WK 
 
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I know this may not help, but my 07 4.7 does not have a clutch fan. Didn't when I bought it. Its got a pretty large electric fan though.
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