Attach a fan clutch wrench to the fan clutch. Remove the fan hub nut from the water pump by turning
counterclockwise
. Remove the fan from the vehicle and lay it blade face down on a workbench. Remove the fan bolts from the back of the fan clutch, then remove the old fan clutch from its housing.
How do you remove the fan clutch on a Chevy?
Attach a fan clutch wrench to the fan clutch. Remove the fan hub nut from the water pump by turning
counterclockwise
. Remove the fan from the vehicle and lay it blade face down on a workbench. Remove the fan bolts from the back of the fan clutch, then remove the old fan clutch from its housing.
Is a clutch fan supposed to spin freely?
Expert Reply: If there is a fan clutch between the fan and radiator on your vehicle, then you will be able to turn the fan by hand when the engine is off and not running. … If the fan is turning freely with
no clutch
, then there is a problem with either the belt being loose or the pulley will need adjustments.
What is a fan clutch wrench?
This unique tool is
designed to aid the technician in removal of the fan clutch
. It’s pin design mates to the holes in the water pump pulley so that the technician can loosed the fan clutch nut with SP TOOLS #95210. Holding this pulley correctly is required in order to break the nut loose.
What are the symptoms of a bad fan clutch?
- Vehicle overheating. …
- Excessively loud cooling fans. …
- Decrease in power, acceleration, and fuel efficiency.
How do you check a fan clutch on a Silverado?
Raise the hood, with the engine off and cold.
Reach in and spin the fan blade by hand
. If it continues to spin freely for more than five turns with no signs of drag, you have a bad fan clutch.
What sound does a bad fan clutch make?
Clunking
Sometimes a customer will hear a clunking noise when the engine is running. It’s a common sound that could mean so many different things, including broken clutch fan blades.
Will a bad fan clutch cause AC problems?
Registered.
Yes
, a bad fan clutch will cause A/C issues. The condenser needs air flow to cool hot refrigerant.
What size is the fan clutch nut on a Duramax?
The nut is
47mm or 1-7/8′′
which ever you prefer.
How does auto fan clutch work?
A fan clutch is a thermostatic engine cooling fan that can freewheel at low temperatures when cooling is not needed, allowing the engine to warm up faster, relieving unnecessary load on the engine. As temperatures increase, the clutch engages so that the fan is driven by
engine power and moves air to cool the engine
.
Why is fan clutch engaged cold?
A thermal fan clutch is engaged on a cold startup
because the fluid drains into the working area when the engine is shut off
. The fan clutch will slow down shortly after startup as result of a pumping action produced by a difference in speed between the shaft and the body of a clutch.
What temperature does a fan clutch engage?
At what temperatures do fan clutches engage? Answer: Most fan clutches engage at
about 170°F air temperature
(about 180-190°F engine temperature). They reduce the temperature about 20°F before disengaging.
How tight should a clutch fan be?
Snugged up is Good Enough
. For “The Jesus Nut” to the Threaded outer portion of the Water Pump… Snugged Tight is Fine.
What size is a fan clutch wrench?
Registered. The fan clutch “nut” is
36 mm
. You can use a 1 7/16′′ wrench which will be loose but will work, or you can take a 1 3/8′′ wrench and grind the open end to fit.
How do you remove a water pump pulley?
- Remove obstacles away from the water pump. …
- Remove the engine’s timing belt or chain if necessary, as this is often in the way of the water pump. …
- Remove the water pump belt from the water pump. …
- Install the pulley removal tool to the water pump pulley. …
- Tighten the removal tool slowly.
Is it OK to drive with bad fan clutch?
The fan clutch controls the operation of the cooling fan, and if a
fan clutch goes bad, it may not engage properly or at all
. As a result, it will disable the fans or prevent them from working at maximum efficiency, which will lead to the engine overheating and more severe issues if left unattended.
Can you drive without a fan clutch?
You will be fine, I had Trailblazer SS that I drove for 2 weeks with no fan while I waited for a tune update in the wintertime.
What does a fan clutch tool look like?
A pneumatic fan clutch tool has an
open-ended wrench on one side and slot on the other side that looks like a hook
. The fan clutch wrench fits over the large nut, then a long metal shaft fitted to an impact hammer slides into the slot. One short pull of the trigger is often enough to loosen the nut.
How much does it cost to replace a fan clutch?
| Repair Type Zip Cost | Clutch Fan 37475 $384 | Clutch Fan 13369 $224 | Clutch Fan 98027 $179 | Clutch Fan 7767 $352 |
|---|
How do I unscrew my radiator fan?
Use the
blade of a slotted screwdriver
to lift the clip if you are unable to pull it up with a finger. The plug carries all electrical connections to the fan. Once it is unplugged, the fan power is disconnected.
How do you check a fan clutch?
To confirm the diagnosis, start with this simple test:
Spin the fan as hard as
you can on an engine that has not been started that day. If the fan rotates more than five times, you can bet the clutch is bad. You should feel some resistance and the fan may spin up to three times, depending on the ambient temperature.
What causes a fan clutch to stay engaged?
When cruising, the vehicle moving through the air pushes air through the radiator, cooling the engine. … If the fan clutch seizes, it remains engaged all the time,
cooling off the engine too much
. Excess fan noise at high speed is caused by the same problem, a seized fan clutch.
