Question about 1999 Chevrolet Silverado 1500

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How to remove fan assembly and water pump on 1999 silverado v8?

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Take off the upper half of the fan shroud by removing the 13mm bolts on the top and sides of the shroud. You want to remove the nuts that secure the nuts that hold the pulley to the pump by inserting down from the top a long flathead screwdriver into the space between two of the nuts and lock the pulley in place by prying to the right. Now you can use a box end wrench (also known as a closed end wrench or combo wrench) to loosen the nuts. You can do this with or without the belt on. I recommend leaving the belt on so the pulley has some tension against it and it is easier to control. if you have already removed the belt, it's not worth it to put it back on. Be careful not to damage the radiator fins when you actually remove the fan and pulley.

Posted on May 26, 2010

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Replacing water pump


This is for the 3.9 v6 you did not specify motor size.
Hope this helps, it it does please leave feedback Thank You and Good Luck


The water pump can be removed and installed without discharging the air conditioning system (if equipped).
  1. Disconnect battery negative cable.
  2. Drain cooling system.
  3. Do not waste reusable coolant. If solution is clean, drain coolant into a clean container for reuse.
WARNING: CONSTANT TENSION HOSE CLAMPS ARE USED ON MOST COOLING SYSTEM HOSES. WHEN REMOVING OR INSTALLING, USE ONLY TOOLS DESIGNED FOR SERVICING THIS TYPE OF CLAMP, SUCH AS SPECIAL CLAMP TOOL (NUMBER 6094). SNAP-ON CLAMP TOOL (NUMBER HPC-20) MAY BE USED FOR LARGER CLAMPS. ALWAYS WEAR SAFETY GLASSES WHEN SERVICING CONSTANT TENSION CLAMPS.

CAUTION: A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original equipment clamp with matching number or letter.


  1. Remove upper radiator hose clamp and hose at radiator.
Fan Blade And Viscous Fan Drive-3.9L/5.2L/5.9L Engines 81898572


  1. The thermal viscous fan drive is attached (threaded) to the water pump hub shaft. Remove fan/viscous fan drive assembly from water pump by turning mounting nut counterclockwise as viewed from front. Threads on viscous fan drive are RIGHT HAND. A Snap-On 36 MM Fan Wrench (number SP346 from Snap-On Cummins Diesel Tool Set number 2017DSP) can be used. Place a bar or screwdriver between water pump pulley bolts to prevent pulley from rotating. Do not attempt to remove fan/viscous fan drive assembly from vehicle at this time.
  2. If water pump is being replaced, do not unbolt fan blade assembly from thermal viscous fan drive.
  3. Remove fan shroud attaching hardware (two bolts at bottom-two clips at top).
  4. Remove fan shroud and fan blade/viscous fan drive assembly from vehicle as a complete unit.
  5. After removing fan blade/viscous fan drive assembly, do not place thermal viscous fan drive in horizontal position. If stored horizontally, silicone fluid in viscous fan drive could drain into its bearing assembly and contaminate lubricant.
  6. Do not remove water pump pulley bolts at this time.
Automatic Belt Tensioner Assembly-3.9L/5.2L/5.9L Engines 81898573


  1. Remove accessory drive belt as follows: The drive belt is equipped with a spring loaded automatic tensioner. Relax tension from belt by rotating tensioner clockwise (as viewed from front). When all belt tension has been relaxed, remove accessory drive belt.
  2. Remove four water pump pulley-to-water pump hub bolts and remove pulley from vehicle.
  3. Remove lower radiator hose clamp and remove lower hose at water pump.
  4. Remove heater hose clamp and heater hose from heater hose coolant return tube.
Coolant Return Tube-3.9L/5.2L/5.9L Engines-Typical 81898574


  1. Loosen heater hose coolant return tube mounting bolt and remove tube from water pump. Discard the old tube O-ring.
Water Pump Bolts-3.9L/5.2L/5.9L Engines 81898575


  1. Remove seven water pump mounting bolts.
  2. Loosen clamp at water pump end of bypass hose. Slip bypass hose from water pump while removing pump from vehicle. Discard old gasket.
CAUTION: Do not pry water pump at timing chain case/cover. The machined surfaces may be damaged resulting in leaks.


Belt Routing-3.9L/5.2L/5.9L Engines 81898576

Jan 01, 2011 | 1999 Dodge Durango

1 Answer

How do you put a water pump i a 1999 dodge durango 5.2 8cyc 4wd. if can step by step and a


First disconnectthe cable from negative terminal of the battery. drain the cooling system if the coolant is relatively new or in good condition, save it. remove the cooling fan and shroud. remove the drive belt and water pump pulley. loosen the clamps and detach the hoses from the water pump. if stuck try to twist to break seal. check hoses if bad replace. on v6 & v8 remove the water pump coolant return tube mounting bolt. Remove the bolts and detach the water pump from the engine. Note: the location of the various lengths and different types of bolts as you remove them. to ensure correct installation. on v8 models reach above the water pump with pilers to release the hose clamp on the bypass hose.clean the bolt & and the threaded hoses in the engine. compare the new pump with the old one make sure there identical. remove all traces of old gasket material from engine.

Sep 02, 2010 | 1999 Dodge Durango

1 Answer

How do you remove the fan clutch 1999 5.7 Liter?


use a wrench long enough to reach past the fan and use a hammer to impact it loose, also check if it is reverse treaded a lot of them are

Apr 28, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

How do i change a water pump on 1996 grand cherokee limited V8


I'll assume you have a 4.0l

The 4.0L engine is equipped with a reverse rotation (counterclockwise) water pump. The word REVERSE is stamped or imprinted on the cover of the viscous fan drive and on the inner side of t he fan. The letter R is stamped onto the water pump impeller. When replacing water pump, ensure proper pump is installed. Installation of the wrong water pump will cause engine overheating.

NOTE:On models with 4.0 L engine, front grill must be removed to access radiator draincock. Draining cooling system can be accomplished by removing drain plug from side of block as well as by loosening radiator draincock. Drain plug is located on lower left side of engine block.

Disconnect negative battery cable. Drain cooling system. Disconnect electric cooling fan connector. Remove electric cooling fan and electric fan shroud assembly (if equipped).
Loosen, but do not remove, 4 water pump pulley-to-water pump hub bolts and 4 viscous fan-to-idler pulley nuts. Remove accessory drive belt. Remove 4 viscous fan to idler pulley nuts, and remove fan and shroud together.
Remove 4 water pump pulley bolts and remove pulley. Remove power steering pump and bracket. Disconnect heater hoses and lower radiator hose at water pump. Remove 4 water pump retaining bolts. Remove water pump.

to install just reverse procedures

Apr 05, 2010 | 1996 Jeep Grand Cherokee

1 Answer

Change water pump


1 disconect neg.battery cable 2 drain the cooling system 3 remove air intake tube from filter housing to throttle body 4 remove top half of fan shroud 5 remove the serpentine belt 6 use a strap wrench to prevent the waterpump pulley from turning while turning the fan clutch in the counterclockwise direction. 7 remove fan and set aside 8 remove belt tensioner 9 remove hoses from water pump 10 remove 6 bolts, 3 on either side and remove the water pump. 11 remove the thermostat housing from the old pump and install on the new one. 12 re assemble in reverse order. make sure the mating surface of the engine block where the pump bolts on is clean and free of old gasket material before installing new pump and gaskets. When assembled fill cooling system, start engine and let idle untill thermostat opens and engine reaches operating temp.KEEP WATER LEVEL FULL. After a test drive recheck the coolant level, and you are done.

Mar 14, 2010 | 2000 Chevrolet Silverado 1500

1 Answer

How to remove fan from water pump, '99 silverado 4.8


the is a special flat wrench and pulley holder to remove. there is also a wrench kit from lisle tool that make for use with an air hammer that works great. Note: the thred on the fan is right hand

Aug 01, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

How to replace a water pump on a 98 durango


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The water pump can be removed and installed without discharging the air conditioning system (if equipped).
  1. Disconnect battery negative cable.
  2. Drain cooling system. Refer to Cooling System-Draining and Filling.
  3. Do not waste reusable coolant. If solution is clean, drain coolant into a clean container for reuse. WARNING: Constant tension hose clamps are used on most cooling system hoses. When removing or installing, use only tools designed for servicing this type of clamp, such as special clamp tool (number 6094). snap-on clamp tool (number HPC-20) may be used for larger clamps. Always wear safety glasses when servicing constant tension clamps. CAUTION: A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original equipment clamp with matching number or letter.
  4. Remove upper radiator hose clamp and hose at radiator.
  5. The thermal viscous fan drive is attached (threaded) to the water pump hub shaft. Remove fan/viscous fan drive assembly from water pump by turning mounting nut counterclockwise as viewed from front. Threads on viscous fan drive: are RIGHT HAND. A Snap-On 36 MM Fan Wrench (number SP346 from Snap-On Cummins Diesel Tool Set number 2017DSP) can be used. Place a bar or screwdriver between water pump pulley bolts to prevent pulley from rotating. Do not attempt to remove fan/viscous fan drive assembly from vehicle at this time.
  6. If water pump is being replaced, do not unbolt fan blade assembly from thermal viscous
  7. Remove fan shroud attaching hardware (two bolts at bottom-two clips at top).
  8. Remove fan shroud and fan blade/viscous fan drive assembly from vehicle as a complete unit.
  9. After removing fan blade/viscous fan drive assembly, do not place thermal viscous fan drive in horizontal position. If stored horizontally, silicone fluid in viscous fan drive could drain into its bearing assembly and contaminate lubricant.
  10. Do not remove water pump pulley bolts at this time.
  11. Remove accessory drive belt as follows: The drive belt is equipped with a spring loaded automatic tensioner. Relax tension from belt by rotating tensioner clockwise (as viewed from front). When all belt tension has been relaxed, remove accessory drive belt.
  12. Remove four water pump pulley-to-water pump hub bolts and remove pulley from vehicle.






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Jun 30, 2009 | 1998 Dodge Durango

1 Answer

1999 dodge ram, how to remove fan and pulley from water pump


The clutch fan assembly unscrews from the water pump with a special tool that can be rented or purchased from local autoparts stores. If the assembly is left hand threads is should be indicated on the plastic fan schroud (cover).

Jun 08, 2009 | 1999 GMC Jimmy

1 Answer

I need directions to change my water pump


drain engine coolant.relieve belt tension .and remove the drive belt.remove upper fan shroud.remove fan or fan and clutch assembly.remove water pump pulley and coolant hoses from water pump.remove water pump bolts.then remove pump from engine.pay attention to bolts location because they are different lenghts.clean water pump gasket mounting surface dont scratch .or pump gasket wont seal and leak .apply sealant to water pump bolts.install water pump with new gasket.if gasket paper put a sealant on it.torque water pump bolts to 30 ft lbs.if you got a 2.2L engine torque water pump bolts to 18 ft lbs.install coolant hoses on pump .install water pump pulley.install fan and fan clutch assembly.install the drive belt .and the upper fan shroud.fill the radiator with coolant.then run engine to check for leaks.WARNING AS A SAFETY PRECAUTION REMOVE NEGATIVE BATTERY CABLE SO CAR WONT BE CRANK BY ACCIDENT. ALSOOOO DONT FORGET TO TURN OFF RADIO FIRST BEFORE DISCONNECTING BATTERY SO YOU WONT LOSE YOUR RADIO CODE.

Jun 01, 2009 | 1999 GMC Jimmy

1 Answer

How do you remove the fan from the water pump on a 1999 silverado


i have a 97 chevy tahoe and i did the water pump , boy was that a big mistake . well i did it but i needed help . you need to nock the bolt loose with a hamer , the dealer use a speacal tool just forthis becoues its crazy but it takes some force . a larg wrench and a cupole of good wacks will getr done , so if this is to vage but you can always call your local dealer and ask to speak to a service tech

Apr 01, 2009 | 1999 Chevrolet Silverado 1500

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