Sponsored Content
J
Free Member
Send PMMAPLE, Canada
Joined: 3/9/2008
Posts: 164
Vette(s): 70 VETTE 350/300HP, AUTOMATIC, ALL STOCK EXCEPT FOR MILD CAM,LAGUNA GREY, 3:55 POSI GEARS
HOW MUCH RESISTANCE SHOULD THERE BE ON THE FAN CLUTCH WHEN THE VEHICLE WAS RUNNING FOR A HALF HOUR.
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
SPONSOR AD:: (Our Sponsors help support Vette Registry)
I'm not an expert but after 1/2 hour of run time my 77s fan clutch has fairly stiff resistance. If you shut the engine off after it reaches normal temperature range (165-195 Deg F or so) you should not be able to spin it freely and there should be moderate resistance.
Hope this helps!!
Mel
Lifetime Member #90 
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
J
Free Member
Send PMMAPLE, Canada
Joined: 3/9/2008
Posts: 164
Vette(s): 70 VETTE 350/300HP, AUTOMATIC, ALL STOCK EXCEPT FOR MILD CAM,LAGUNA GREY, 3:55 POSI GEARS
MINE HAS NO RESISTANCE, I WILL GO TO SPIN IT AND IT WILL TURN 1/4 OF THE WAY COMPARED TO 1/2 OR 3/4 WHEN ITS COLD, IS THIS NORMAL.
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
V
Former Member
Send PMMounds View, MN - USA
Joined: 5/24/2007
Posts: 1034
Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
That is a function of temperature. The hotter the the clutch body, the tighter it should get so it turns the fan and cools the engine.
Larry
Larry
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
2011111017209r.jpg)
If you are interested in more details go here; http://www.popularmechanics.com/how_to_central/automotive/1772922.html
corvette440hp
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
A
Years ago I remember there was available an adapter that lets you remove your fan clutch and allows the fan to turn full time. I don't know if these are still made or if it is a good idea to use them on a Vette.
Aaron 
CLICK HERE to enlarge picture
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
A
I did a search and found spacers available so you can remove your fan clutch and have your fan run full time as well as some pretty cool flex fans that help cool better than stock fans. You can get them in colors also.
Aaron
CLICK HERE to enlarge picture
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
Lifetime Member
Send PMGreensburg, IN - USA
Joined: 9/24/2003
Posts: 5387
Vette(s): Previous: 1984 Coupe, 1988 Maroon Coupe, 1989 Coupe, 2001 Roadster Present: 1967 Stingray Roadster, 1976 Stingray Coupe, 1989 Roadster..
I took mine off and am running a flex-cool fan. Spins all of the time but the blades adjust to the speed the fan turns to draw air.
Tuxblacray: She's Back In Black! Check out my pics @ My Link 
(Click on image to see a bigger version)
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
V
Former Member
Send PMMounds View, MN - USA
Joined: 5/24/2007
Posts: 1034
Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
If you can figure out your fan clutch problem, that seems to me to be the best answer. The flex fans don't move as much air at idle, and use more power at speed. And they usually are noisier. They are also cheaper than a good fan clutch, so choose your poison.
Larry
Larry
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
My question would have to be, is your car running hot? You can tell if the fan is turning fast enough just by the amount of air its moving when its hot. Plus a lot of times when they go bad you will see some leakage out the back side. I've had them before where you can actually stop it with your hand when its running. If the clutch is working right, I agree with Larry, thats the way I would go.
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
in Forum: C3 HVAC, Fuel, Emissions, and Exhaust
Sponsored Content