FAN CLUTCH for SURE???? - Chevrolet Forum - Chevy Enthusiasts Forums

Go Back   > >
Log In 

S-10 & Blazer 1982-2005
The S-10 and Blazer was arguably the most versatile and accessorizable mid-size truck and SUV on the market.
Platform: S/T-series & GMT 330

LinkBack Thread Tools Search this Thread
Old 04-23-2009, 08:35 AM
CF Beginner
Thread Starter
Join Date: Sep 2008
Posts: 11
Default FAN CLUTCH for SURE????

Okay, How can I be 100% sure my fan clutch is good or bad?
When I cold start it the fan starts out already making noise as if I had driven it on a hot day. After driving it 1/2 to 3/4 miles it returns to normal.
Should this be the norm? Should it be just opposite due to the cold start?

Thanks in advance.
Reply With Quote
Old 04-23-2009, 10:47 AM
EvansBlue's Avatar
Ride of the Month
April 2009
Join Date: Jul 2007
Location: Princeton, NC, USA
Posts: 6,151

Most of the time the fan will engage for a little while on start, but usually by the time you get on the road, it clutches out.
Reply With Quote
Old 04-23-2009, 10:57 AM
Mike Sigmond's Avatar
Super Moderator
ROTM Coordinator
Join Date: Apr 2009
Location: Orange County, CA
Posts: 1,947

My truck does the same sometimes, Isnt there a temp sensor that controls it?
Reply With Quote
Old 04-24-2009, 02:33 AM
CF Beginner
Thread Starter
Join Date: Sep 2008
Posts: 11

Not sure. Let me know if you find out.
Reply With Quote
Old 04-24-2009, 07:25 AM
MDTAHOE's Avatar
Super Moderator
Professional Mechanic
Join Date: Nov 2008
Location: Bowie, MD
Posts: 2,955

It is normal. The viscus fluid in the clutch settles at the bottom of the clutch when it sits. As long it goes away it is normal
Reply With Quote
Old 04-24-2009, 07:38 AM
in2pro's Avatar
Join Date: Apr 2008
Location: Austin, Texas
Posts: 7,219

There shouldn't be any leakage from the clutch,
don't confuse it with a water pump leak, as both fluids can be slippery to the touch.

There should be very little to no lateral movement at the bearing

There should be no roughness when you rotate the fan manually (with engine off of course)
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Fan blade causing fan clutch to over-engage? pdrayton Silverado & Fullsize Pick-ups 2 05-29-2013 07:55 PM
How to: Remove a fan clutch without a fan clutch tool pdrayton Silverado & Fullsize Pick-ups 6 01-10-2013 09:30 AM
98 Silverado 5.7 scrapping clutch fan switching to electric fan SweetEmotion Silverado & Fullsize Pick-ups 1 04-27-2012 08:35 PM
fan clutch robertmalibu TrailBlazer 1 02-27-2008 08:41 PM
Fan clutch removal jimbo S-10 & Blazer 1 04-23-2006 07:27 PM

2000, 2500hd, bad, blazer, chevrolet, chevy, clutch, engage, express, fan, lateral, long, movement, remove, removing

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 08:08 PM.