I STILL have my problem...I have a 2006 kia sorento lx 4x4 with a mitsubishi 3.5 that I just replaced timing belt, water pump, idler pulley, tension pulley, tensioner, I also just replaced crank posit

Water pump is Timing belt driven. It is below the Camshaft sprocket, in the timing case. If you want to repair/replace it here are the instructions.
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COMPONENTS

REMOVAL

1. Using the drain plug, drain the coolant.
2. Remove the drive belt and the engine coolant pump pulley.
3. Remove the timing belt cover, the auto tensioner and idler pulley.
4. Remove the water outlet fitting, the thermostat case and the water pump fitting.
5. Remove the engine coolant pump mounting bolts.

1. Remove the engine coolant pump assembly from the cylinder block.

INSPECTION

1. Check the engine coolant Water pump for cracks, damage or wear, and replace the pump assembly if necessary.
2. Check the bearing for damage, abnormal noise and sluggish rotation and replace the pump assembly if necessary.
3. Check the seal it for leaks and replace the pump assembly if necessary.

INSTALLATION
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1. Clean the gasket surfaces of the engine coolant pump body and the cylinder block.

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1. Install the new engine coolant pump gasket and pump assembly. Tighten the bolts to the specified torque. Tightening torque

Engine coolant pump bolt:
Head mark "7": 17 - 22 Nm(170 - 220 kg.cm, 12 - 16 ft. lbs.)

1. Install the water pump fitting, the thermostat case and the water outlet fitting.
2. Install the auto tensioner and timing belt. Adjust the timing belt tension, then install the timing belt cover.
3. Install the drive belt, coolant pump pulley and then adjust the auto tensioner.
4. Refill the coolant.
5. Run the engine and check for leaks.

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I want you to go to this url, it's the official KIA forum dealing with older Sorentos.https://www.kia-forums.com/2003-2010-sorento-forum/53820-sorento-crank-bolt.html It's free to create a login.
It details the need to replace the crank pulley bolt with a new one supplied by KIA. This bolt, if reused, can break causing a catastrophic engine failure. Do not buy any other bolt., it's not worth trying to save a few pennies.I have a 2005 Sorento and had my local KIA dealer do this job and other work as long as the front cover is off, replace the water pump, the timing belt idlers and tensioner assembly. It's cheaper to d all that at one time than to go back and have to redo the cover removal. Hope this helps.

This all depends on what engine you have and also if you are going to just do the belt.
this car , if you have a 100,000 miles or close you should do the job right, right meaning replace the timing belt ,water pump and timing belt pulleys and tensioner, this could run about $1200.00.

the same job with the smaller engine could be $800.00

if you just do the belt alone which is not the right way but can be done then it may cost about $500.00 -$600.00

Removal & Installation

3.5L Engine

1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
2. Record the radio anti theft code data.
3. Remove or disconnect the following:
   
   Negative battery cable Engine cover Accessory drive belts Idler pulley Crankshaft pulley Power steering pump pulley Belt tensioner pulley Upper and lower timing belt covers
   
4. Support the engine with a floor jack and remove the engine mount.
5. Rotate the engine to align the camshaft sprocket timing marks with the cylinder head cover timing marks.
   
   

   Fig. Timing belt routing and timing marks-3.5L Engine
   

6. Remove or disconnect the following:
   
   Auto tensioner Timing belt
   
   

   Fig. Timing belt and related components-3.5L Engine
   
   

To install:

1. Ensure that the engine is set to Top Dead Center (TDC).
2. Prepare the auto tensioner for installation by compressing it in a vise and installing a retaining pin.
3. Install the timing belt in the following order:
   1. Crankshaft sprocket
   2. Idler pulley
   3. Left bank exhaust camshaft sprocket
   4. Left bank intake camshaft sprocket
   5. Water pump pulley
   6. Right bank intake camshaft sprocket
   7. Right bank exhaust camshaft sprocket
   8. Tensioner pulley
   
   
4. Install the auto tensioner. Do not remove the retaining pin at this time.
5. Check that the crankshaft and camshaft timing marks are aligned correctly.
6. Rotate the crankshaft 1 / 4 turn Counterclockwise .
7. Rotate the crankshaft 1 / 4 turn Clockwise to return the engine to TDC.
8. Loosen the tensioner pulley center bolt.
9. Apply 44 inch lbs. (5 Nm) torque to the tensioner pulley as shown and tighten the center bolt to 32-41 ft. lbs. (43-55 Nm).
   
   

   Fig. Adjusting the tensioner pulley-3.5L Engine
   

10. Remove the auto tensioner retaining pin.
11. Rotate the crankshaft 2 revolutions Clockwise , then wait 5 minutes for the auto tensioner to adjust.
12. Measure the auto tensioner rod as shown. If the measurement is not 3.8-4.5 mm, then repeat the belt tensioning procedure.
    
    

    Fig. Measuring the auto tensioner rod-3.5L Engine
    

13. When the auto tensioner measurement is correct, install or connect the following:
    
    Engine mount Upper and lower timing belt covers Belt tensioner pulley Power steering pump pulley Crankshaft pulley Idler pulley Accessory drive belts Engine cover Negative battery cable
    
14. Reprogram the radio anti theft codes

The idler pulley deflects out of the way using a special wrench, the pulley is held against the belt only by a preset spring tension mechanism. You put the wrench on the bolt or in the square drive hole and deflect the pulley away from the belt, it must be manually held there to put the new belt on and then released to tension the new belt.

I also need help knowing how to replace the belt tensioner pulley. It looks like you can't get out the bolt because the pulley is real close to the frame, unless the bolt has nuts on both ends, but it doesn't look like it.

1. Drain the cooling system until the coolant is below the level of the water pump.
2. Loosen the water pump pulley bolts.
3. Rotate the drive belt tensioner to release the tension on the drive belt.
4. Remove the drive belt from the right idler pulley.
5. Carefully release the drive belt tensioner spring tension.
6. Remove the water pump pulley bolts.
7. Remove the water pump pulley.
8. Remove the water pump bolts.
9. Remove the water pump.
10. Remove the water pump gasket.
11. Clean the water pump mating surfaces.

To install:

Fig. Remove the mounting bolts (3) to remove the water pump (1) and gasket (2).

1. Install the water pump gasket (2).
2. Install the water pump (1).
3. Install the water pump bolts (3). Tighten the bolts to 10 Nm (89 inch lbs.).
4. Install the water pump pulley. Loosely install the pulley bolts.
5. Insure the drive belt is properly centered on all the pulleys except the right idler puller.
6. Rotate the drive belt tensioner away from the drive belt.
7. Install the drive belt to the right idler pulley.
8. Release the tensioner allowing the drive belt tensioner to come in contact with the drive belt.
9. Inspect the drive belt to insure the belt is properly centered on all the pulleys.
10. Tighten the water pump pulley bolts. Tighten the bolts to 25 Nm (18 ft. lbs.).
11. Fill the cooling system.
12. Inspect the cooling system for leaks.

going clockwise starting on the passenger side of truck
1 over the alternator pulley
2 under the water pump pulley
3 over the idler pulley
4 over the power steering pulley
5 over radiator fan pulley
6 over crankshaft pulley
7 automatic tensioner
8 over a/c if equiped

Kia Sorento 2003-05
Water Pump - Removal & Installation

1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
2. Drain the cooling system.
3. Disconnect the negative battery cable.
4. Remove the drive belt and the water pump pulley.
5. Remove the timing belt cover, timing belt, auto tensioner and idler pulley.
6. Remove the water outlet fitting, the thermostat case and the water pump fitting.
7. Remove the water pump mounting bolts.
8. Remove the water pump.
   



Fig. Water pump and timing belt assembly-exploded view

To install:



Fig. Water pump bolt locations

1. Clean the gasket surfaces of the water pump body and the cylinder block.
2. Install the new water pump gasket and pump assembly. Tighten the bolts to 12-16 ft. lbs. (17-22 Nm).
3. Install the water pump fitting, the thermostat case and the water outlet fitting.
4. Install the auto tensioner and timing belt. Adjust the timing belt tension, then install the timing belt cover.
5. Install the drive belt, water pump pulley and then adjust the auto tensioner.
6. Refill the coolant.
7. Run the engine and check for leaks.

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the cooling system.
3. Disconnect the negative battery cable.
4. Remove the drive belt and the water pump pulley.
5. Remove the timing belt cover, timing belt, auto tensioner and idler pulley.
6. Remove the water outlet fitting, the thermostat case and the water pump fitting.
7. Remove the water pump mounting bolts.
8. Remove the water pump.

To install:




Fig. Water pump bolt locations



Fig. Water pump O-ring installation

1. Clean the gasket surfaces of the water pump body and the cylinder block.
2. Install the new water pump gasket and pump assembly. Tighten the bolts to 12-16 ft. lbs. (17-22 Nm).
3. Install the water pump fitting, the thermostat case and the water outlet fitting.
4. Install the auto tensioner and timing belt. Adjust the timing belt tension, then install the timing belt cover.
5. Install the drive belt, water pump pulley and then adjust the auto tensioner.
6. To adjust the drive belt tension, hang the belt on the pulley of the tensioner and install the tensioner.
   NOTE If the tensioner is already installed, loosen its mounting bolts to allow belt installation
   
7. Install the drive belt.
8. Adjust the belt tension to specification by turning the adjusting bolt clockwise or counterclockwise.
9. Air conditioning belt tension should be 0.28-0.039 inch. Alternator belt tension should be 0.39-0.051 inch. Power steering belt tension should be 0.31-0.051 inch.
10. Torque the tensioner assembly bolt to 33-36 ft. lbs. (45-50 Nm).
11. Refill the coolant.
12. Run the engine and check for leaks.

TY for using Fixya; remember comment and rated this.

here it is

Item Part Number Description 1 6B209 Drive Belt Tensioner 2 8678 Belt Idler Pulley 3 10344 Generator Pulley 4 8509 Water Pump Pulley 5 8678 Belt Idler Pulley 6 3A733 Power Steering Pump Pulley 7 6316 Crankshaft Vibration Damper and Pulley 8 — Drive Belt Tensioner Pulley 9 2E884 A/C Clutch Pulley (If Equipped)