Engine - Chirp Noise From Drive Belt With A/C ON
TECHNICALBulletin No.: 10-06-01-001
Date: January 11, 2010
Subject: Chirp Noise from Accessory Drive Belt with A/C Compressor On (Replace Generator Pulley)
Models:
2008-2009 Saturn Astra
Equipped with Automatic Transmission (RPO MNF)
Condition
Some customers may comment on a chirp, or other similar noise, from the engine compartment of the vehicle. The noise will typically be heard when accelerating from a stop, between 800-1800 RPM. This is more noticeable on humid days with the A/C on.
Correction
When diagnosing this noise, remove the accessory drive belt (refer to Drive Belt Removal in SI) and test drive the vehicle for a very short distance. If the noise has gone away, replace the generator pulley with GM P/N 55560294.
Note
SPX Kent-Moore tool number 8395923 is required for this bulletin.
Generator Pulley Removal Procedure
1. Disconnect the battery.
1. Remove the negative connection from the ground terminal.
2. Loosen the nut.
2. Remove the Air Cleaner Assembly. Refer to Air Cleaner Assembly in SI.
3. Remove the three top bolts on the passenger side top mount (1).
4. Remove the drive belt. Refer to Drive Belt removal in SI.
5. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
6. Remove the right front wheel. Refer to Tire and Wheel Removal and Installation in SI.
7. Support with a transmission jack on the engine oil pan. Loosen the front frame bolts (1, 2, 3) on the passenger side only - just enough to lower the support frame.
8. Remove the top generator bolt (1). Loosen the bottom bolt (2).
9. Pivot the generator in order to gain access to the pulley nut.
10. Remove the center nut of the generator pulley.
Note
The pulley nut is threaded counterclockwise (left hand thread).
11. Install the new pulley, GM P/N 55560294, on the generator, finger tight.
12. Using SPX Kent-Moore tool 8395923, insert the black tool into the center of the generator. Hold with a 15 mm wrench (2). Then use a ratchet and tighten the nut with the special TORX(R) socket that comes with the tool (1).
Tighten
Tighten the nut to 80 Nm (59 lb ft).
Please contact GM-TOOLS for pricing information or to place your order for this tool (8395923).
Saturn/Saab retailers in Canada: Tool 8395923 was previously shipped as a Saab tool.
13. Reattach the generator bolts.
Tighten
Tighten the two bolts to 35 Nm (25 lb ft).
14. Tighten the front frame bolts.
15. Install the right front wheel. Refer to Tire and Wheel Removal and Installation in SI.
16. Install the drive belt. Refer to Drive Belt Installation in SI.
17. Install the three top bolts on the passenger side top mount.
18. Install the air cleaner assembly. Refer to Air Cleaner Assembly installation in SI.
19. Connect the battery. Connect the negative battery cable to the ground terminal.
Tighten
Tighten the nut to 5 Nm (44 lb in).
Parts Information
Warranty Information
For vehicles repaired under warranty, use the table above.
Disclaimer