Fan Clutch?
04-26-03, 04:18 PM
#1
Senior Member
Thread Starter
Join Date: Jun 2002
Location: Jupiter, Florida
Posts: 345
Likes: 0
Received 0 Likes
on
0 Posts
Fan Clutch?
Went to the mechanic to get my a/c fixed, he fixed it and says the hose blew because my fan clutch is broken, so he says he "bolted" it if i recall. So now when I get past 3k, I hear the worst sound ever. How much are fan clutches?
04-28-03, 03:32 PM
#5
Seduced by the DARK SIDE
Join Date: Apr 2001
Location: Orange Park FL (near Jax)
Posts: 7,323
Likes: 0
Received 2 Likes
on
2 Posts
The fan clutch uses a silicon oil viscous fluid in two chambers inside.
The Bi-metal strip bends outward as it warms and opens the valve from the reservoir side to the clutch side.
Centripetal force provides the pumping action to move the fluid.
After 100,000 miles the bearing seals wear, and the bearing lube weakens the clutch fluid's grip.
The s4 clutch increases it's bite gradually with temperature rise.
The s5 clutch is more on-off. (It just coasts until is gets warm)
Once they are warm, the fan speed goes up directly with engine speed to about 4000 RPM.
As the engine revs higher the fan stays at ~4K.
If your warmed up fan only revs up to ~2500 RPM, it's bad.
The Bi-metal strip bends outward as it warms and opens the valve from the reservoir side to the clutch side.
Centripetal force provides the pumping action to move the fluid.
After 100,000 miles the bearing seals wear, and the bearing lube weakens the clutch fluid's grip.
The s4 clutch increases it's bite gradually with temperature rise.
The s5 clutch is more on-off. (It just coasts until is gets warm)
Once they are warm, the fan speed goes up directly with engine speed to about 4000 RPM.
As the engine revs higher the fan stays at ~4K.
If your warmed up fan only revs up to ~2500 RPM, it's bad.
Last edited by SureShot; 04-28-03 at 03:34 PM.
Trending Topics
04-28-03, 04:46 PM
#12
I wanta be with the BUC!
Join Date: Jan 2003
Location: Knoxville, TN
Posts: 2,305
Likes: 0
Received 0 Likes
on
0 Posts
You don't have those were you live??? We have them every were well not every were but they are not hard to find. I'm sure they have a web site, also look for NAPA if you don't have one of those they usually have some good deals there to.
04-29-03, 02:13 PM
#13
Seduced by the DARK SIDE
Join Date: Apr 2001
Location: Orange Park FL (near Jax)
Posts: 7,323
Likes: 0
Received 2 Likes
on
2 Posts
Originally posted by SureShot
speed goes up directly with engine speed to about 4000 RPM.
As the engine revs higher the fan stays at ~4K.
speed goes up directly with engine speed to about 4000 RPM.
As the engine revs higher the fan stays at ~4K.
I have talked to an Aisian car AC specialist & cut up two of these clutches to see why they cost so much.
E-fans rule..
Last edited by SureShot; 04-29-03 at 02:17 PM.
04-29-03, 03:42 PM
#14
Ditch the clutch fan. Robbs power and its a faulty system. Go to the bone yard and get yourself a stock electric fan with shroud from a 90-96 ford escort for 30 bucks and it will be the best fan you will ever own. Has three speeds low/med/high mine is set to medium and at traffic lights I can open the door and I can feel it pushing hot engine and exhaust air under the car. Almost scared to set it to high in a few months when its really hot. Get one
Thread
Thread Starter
Forum
Replies
Last Post