Squealing noise on and off when accelerating

Welcome to 2CarPros.

See if there is play in the water pump pulley. The bearing may be bad. Also, are you sure the belt is tight enough? The automatic tensioner may be weak.

If you look at picture 1, it explains how to check the tensioner.

If you find it is bad, the directions for replacement are in pictures 2 and 3. Here is a link that shows in general how one is replaced:

https://www.2carpros.com/articles/serpentine-belt-tensioner-replacement

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If you find the water pump is bad, here is a link that shows in general how to replace one. Also, the second link here describes symptoms.

https://www.2carpros.com/articles/water-pump-replacement

https://www.2carpros.com/articles/symptoms-of-a-bad-water-pump

Here are the directions specific to your vehicle. The remaining pictures correlate with these directions.

Water Pump Replacement (LFX)

Special Tools

EN 46104 - Water Pump Pulley Holding Tool

Removal Procedure

1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill LFW or LFX) See: Cooling System > Procedures > Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (Static Fill LSA) See: Cooling System > Procedures > Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (GE 47716 LFW or LFX) See: Cooling System > Procedures > Cooling System Draining and Filling (GE 47716)Cooling System Draining and Filling (GE 47716 LSA) See: Cooling System > Procedures > Cooling System Draining and Filling (GE 47716).

2. Remove the generator drive belt. Refer to Drive Belt Replacement See: Drive Belt > Removal and Replacement > Drive Belt Replacement.

pic 4

3. Use the EN 46104 - water pump pulley holding tool (1) in order to retain the water pump pulley.

pic 5

4. Remove the water pump pulley bolts and DISCARD the bolts.

Caution: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

5. Remove the water pump pulley.

pic 6

6. Remove the water pump bolts and DISCARD the bolts.

7. Remove the water pump.

8. Remove and DISCARD the water pump seal.

9. Carefully clean the water pump sealing surfaces.

Installation Procedure

pic 7

1. Install a NEW water pump seal.

2. Install the water pump.

Caution: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Caution: Refer to Fastener Caution See: Vehicle > Technician Safety Information > Fastener Caution.

3. Install the NEW water pump bolts and hand tighten the water pump bolts.

pic 8

4. Tighten the water pump bolts in sequence.

1. On the initial pass, tighten the bolts in sequence to 10 Nm (89 lb in).

2. On the second pass, tighten the bolts in sequence to 10 Nm (89 lb in).

3. On the final pass, tighten the bolts in sequence shown an additional 45 degrees.

pic 9

5. Install the water pump pulley and the NEW water pump pulley bolts.

pic 10

6. Use the EN 46104 - water pump pulley holding tool (1) in order to retain the water pump pulley.

7. Install the water pump pulley bolts and tighten to 12 Nm (106 lb in).

8. Install the generator drive belt. Refer to Drive Belt Replacement See: Drive Belt > Removal and Replacement > Drive Belt Replacement.

9. Fill the cooling system. Refer to Cooling System Draining and Filling (Static Fill LFW or LFX) See: Cooling System > Procedures > Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (Static Fill LSA) See: Cooling System > Procedures > Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (GE 47716 LFW or LFX) See: Cooling System > Procedures > Cooling System Draining and Filling (GE 47716)Cooling System Draining and Filling (GE 47716 LSA) See: Cooling System > Procedures > Cooling System Draining and Filling (GE 47716).

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Please keep in mind, I am basing this on a belt noise since that is what you suspect. Let me know if this helps or if you have other questions.

Take care,
Joe