Bad fan clutch? -
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Unread 08-20-2014, 02:10 PM   #1
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2002 TJ Wrangler 
Join Date: Jun 2010
Location: Warren, Michigan
Posts: 477
Bad fan clutch?

2002 TJ 4.0L
157k Miles

Things I have replaced within the past 6 months:
Thermostat & Housing
Radiator Cap
Radiator Full Flush

I spent the past week at silver lake sand dunes here in MI and all went well the entire trip until the last day. I noticed that when at idle or low speeds the temp needle will spike to about 220 or so. Before the dunes, she wasnt having any overheating issues at all.

Today when I drove to work on the freeway for work 25 miles it didnt spike over 210 at all. However once I got off the freeway and came to stop lights, it started to jump. I also started to hear a minor squeaking noise coming from under the hood that increased with rpms. When I parked the jeep, I popped the hood and with the engine off and hot, spun the fan with the hand to find that it had little to no resistance and spun freely.

I am assuming it must be the fan clutch but I just want to make sure before I go and replace it. The only two things I havent replaced in the cooling system in the past 3 years I have owned the Jeep is the water pump and the fan clutch.

Also how difficult it is to replace if that ends up being the issue.


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Unread 08-20-2014, 02:17 PM   #2
Powah Injanir
Louie4's Avatar
1993 YJ Wrangler 
Join Date: Aug 2008
Location: Raleigh, NC
Posts: 9,883
Sounds like you found the problem. They are not hard to replace and I use to not even loosen the belt which helped keep it from spinning. I went through several fan clutches before I switched to an electric fan. I kept having overheating at low speeds and the thermal clutches kept failing on me.

I have a jeep...and it is modified...I win.

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Unread 08-20-2014, 02:31 PM   #3
Web Wheeler
JStMarie's Avatar
2006 TJ Wrangler 
Join Date: Jan 2008
Location: Boston, MA
Posts: 1,202
Here's a write-up to replace the fan, seems pretty accurate.

Good luck.
'06 Jeep Wrangler, 65th Edition, stock.
'98 Jeep Wrangler, stock.
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