Question about 1996 Chevrolet S-10 Pickup

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How do you get the fan clutch off of the truck

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They have a special tool kit it around $40 at any auto store. The center of the pulley is threaded. To loosen turn counter clock-wise

Posted on Jun 28, 2009

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Posted on Jan 02, 2017

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My 1999 ford RAnger has heat but the fan makes alot of noise and does not blow out the heat and the trucks gauge will go hot. What would the issue? Heater core or mayb just the fuse?


Diagnose Cooling Fan Clutch On engines with belt-driven cooling fans, a fan clutch is often used to save energy and reduce noise. The fan clutch disengages slows or disengages the engine's cooling fan when extra cooling isn't needed. The fan pulls air through the radiator and air conditioning condenser when the vehicle isn't moving fast enough to provide adequate airflow for cooling. A fan can eat up anywhere from a couple of horsepower up to 12 or 15 hp on a big V8, so by reducing the parasitic horsepower loss on the engine the fan clutch makes a noticeable difference in fuel economy

TWO TYPES OF FAN CLUTCHES basic types of fan clutches: thermal and non-thermal (also called "torque limiting Thermal fan clutches have a temperature-sensitive bimetal coil spring on the front that reacts to temperature changes. When the air coming through the radiator is hot, the spring expands and opens an internal valve that reduces clutch slippage. This causes the fan to spin faster for increased cooling. As the air cools, the spring contracts and closes the valve. This increases the amount of clutch slippage, allowing the fan to slow down and decrease cooling FAN CLUTCH OPERATION

The clutch consists of a fluid coupling filled with a silicone based oil. In the cutaway view at the left, the area between the teeth on the clutch plates is filled with silicone fluid. An internal valve opens and closes a passage between the main fluid cavity and a fluid reservoir. When the passage is open, fluid enters the clutch and makes the fan to turn faster. When the valve is shut, fluid flows back to the reservoir but doesn't return, causing the clutch to slip and the fan to turn more slowly.
The non-thermal (torque limiting) fan clutch doesn't have a temperature sensing capability. It reacts only to speed, slipping to limit maximum fan speed to about 1200 to 2200 rpm depending on the application.

FAN CLUTCH PROBLEMS

A slipping fan clutch is often overlooked as the cause of an engine overheating problem.
As a fan clutch ages, fluid deterioration gradually causes an increase in slippage (about 200 rpm per year). After a number of years of service, the clutch may slip so badly that the fan can't keep up with the cooling needs of the engine and the engine overheats. At this point, replacement is often necessary.
Other signs of fan cluch failure would include any looseness in the clutch (check for fan wobble), or oil streaks radiating outward from the clutch hub.
If the clutch is binding, the fan may not release causing excessive cooling and noise, especially at highway speeds

CHECKING THE FAN CLUTCH

A good clutch should offer a certain amount of resistance when spun by hand (engine off, of course!). But if the fan spins with little resistance (more than 1 to 1-1/2 turns), the fan clutch is slipping too much and needs to be replaced.
If the fan binds, does not turn or offers a lot of resistance, it has seized and also needs to be replaced.
Fan speed can also be checked with an optical tachometer, by marking one of the fan blades with chalk and using a timing light to observe speed changes, and/or listening for changes in fan noise as engine speed changes.
You should also try to wiggle the fan blades by hand. If there is any wobble in the fan, there is a bad bearing in the fan clutch, or a worn bearing on the water pump shaft. A bad water pump bearing will usually cause the water pump to leak and/or make noise, but not always. Remove the fan clutch and see if the play is in the water pump shaft. If it feels tight (no play or wobble), replace the fan clutch.

FAN CLUTCH REPLACEMENT

Many experts say it is a good idea to replace the fan clutch at the same time as the water pump if the water pump has failed. The reason is because both age at about the same rate, so if the water pump has failed, the fan clutch may also fail soon. As as we mentioned earlier, a high mileage fan clutch may be slipping excessively increasing the risk of overheating.
When you buy a replacement fan clutch, make sure you get the same type (thermal or nonthermal) as the original. You can always upgrade from a nonthermal to a more efficient thermal fan clutch, but never the reverse. Or, you can get rid of the fan and clutch altogether and install an aftermarket electric fan kit to cool the radiator.

Sep 28, 2016 | Ford Cars & Trucks

1 Answer

HOW TO REPLACE CLUTCH FAN


to remove clutch fan you need to remove upper fan shroud, you need large wrench to remove the fan clutch retaining nut to remove fan and clutch away from the engine drive belt should keep pulley from turning while loosen fan clutch retaining nut.if pulley belt turns while loosen fan clutch bolt remove drive belt use strap wrench hold pulley while you remove fan clutch bolt this procedure for checvrolet if you working on volkswagon you need spanner wrench hold the idler pulley while you use large wrench to loosen the large drive nut to fan clutch. you have to remove fan with clutch from engine then you can remove clutch from fan you can go to auto parts stores rent a spanner wrench try auto zone they rent out tools.

Jan 05, 2012 | Cars & Trucks

1 Answer

Trying to remove fan clutch,which way does it turn?


YOU NEED TO HOLD FAN CLUTCH WITH A CLUTCH TOOL THEN LOOSEN THE LARGE NUT RETAINING THE FAN AND CLUTCH ASSEMBLY REMOVE FAN TO CLUTCH BOLTS AND NUTS COUNTERCLOCK WISE.

Apr 01, 2011 | 2000 Chevrolet S-10

2 Answers

Motor fan is extremely loud!!


It is likely your fan clutch has gone bad and needs to be replaced.
Fan clutches are engineered to improve the vehicle’s cooling system efficiency. The clutch engages the fan at low speeds when additional cooling is needed. At high speeds the clutch disengages the fan, removing the load against the engine and allowing the engine to run more efficiently.
There are two types of fan clutches, non-thermal and thermal. Non-thermal fan clutches engage the fan based on the shaft speed of the water pump. Thermal fan clutches engage the fan based on a bi-metal thermostatic coil, which senses the under hood temperature.

It will look like this...


2012202.jpg 3e7a417.jpg

Apr 02, 2010 | 1995 Lincoln Town Car

1 Answer

I need to replace the fan clutch on a 1993 Chevy S-10, 2.8 V-6. I have removed the fan cowling. Must I remove the fan as well or just unbolt the clutch?


Your almost done! Remove the fan and clutch as one then unbolt the fan from the clutch. Install fan onto new clutch and reinstall back onto water pump. Put your fan cowling back together and you are done! Good luck!

Mar 13, 2010 | 1993 Chevrolet S-10

1 Answer

How to take out fan clutch


you need a special tool(fan clutch removal tool), autozone will let you borrow for free with a security deposit. Make sure engine is cold. Remove negative battery terminal1. Drain all coolant, and remove top radiator hose. 2.remove fan shroud on radiator(transmission cooler lines may need to be disconnected and slide off the fan clutch harness on the RH side). 3.loosen fan bolts on fan clutch. 4. use fan clutch tool to unbolt main fan clutch bolt. 5. Unplug fan clutch electrical harness. Reverse to install!! NOTE: You may need to reprogram the ECU if you install a new fan clutch and your check engine light comes on. Make sure you refill coolant with GMs recommended dexron coolant. Hopefully this helps....please rate....thanks!!

Aug 07, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

Need to take off fan clutch, have taken off parts in the way


4.9L SFI
SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Fan Clutch Holding Tool T84T-6312-C Fan Clutch Nut Wrench T93T-6312-B
Removal
  1. stj~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: The large clutch assembly nut has a right-hand thread and must be rotated counterclockwise to remove it.
    Remove the fan clutch (8A616) from the water pump (8501) by turning the large nut, which is part of the fan clutch, using Fan Clutch Holding Tool T84T-6312-C and Fan Clutch Nut Wrench T93T-6312-B.
  1. Remove two screws retaining fan shroud.
  1. Remove the fan blade (8600), fan clutch and shroud.
  1. If the fan blade and fan clutch have to be separated, remove the remaining bolts attaching the fan blade to the fan clutch
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5.0L, 5.8L and 7.5L Engines
Removal
  1. Remove screws retaining fan shroud (8146) to radiator (8005).
  1. Remove four screws retaining clutch on water pump hub.
  1. Pull fan clutch and fan blade off water pump pilot and remove fan clutch, fan blade and shroud from vehicle.
  1. Remove four screws and separate fan clutch from fan blade.
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Item Part Number Description 1 8509 Water Pump Pulley 2 57632-S Screw and Washer Assembly, 5/16-18 x .62 Hex 3 8600 Fan Blade (5.0 and 5.8L) 4 8600 Fan Blade (7.5L) 5 8A616 Fan Clutch 6 380288-S2 Screw and Washer Assembly, 5/16-24 x .88 Hex A — 16-24 Nm (12-18 Lb-Ft)

Mar 10, 2009 | 1994 Ford F150 Styleside Supercab

4 Answers

Not sure what fan to buy!!


are you talking about switching to electric fans? or a standard fan that will run all the time?

Feb 27, 2009 | 1999 Chevrolet Silverado 1500

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