Engine - Squeaking/Chirping Noise From R/H Front
Bulletin No.: 04-06-01-024Date: July 01, 2004
TECHNICAL
Subject:
Engine Squeak/Chirp Noise from Bank 2 (Front Bank) Camshaft Sprockets/Behind Timing Belt Cover with Engine Speeds of 600-3500 RPM (Replace Bank 2 [Front Bank] Timing Belt Sprockets)
Models:
2005 Saturn L-Series Vehicles
with 3.0L V-6 Engine (VIN R - RPO L81)
Built Between and Including VIN Breakpoints 5Y501038 to 5Y505543
Attention:
Fixed Operations Manager and Technician
Condition
Some customers may comment on a squeak, chirp, or cricket type noise from the engine. This noise is most noticeable around the timing belt cover at engine speeds of 600-3500 RPM.
Cause
This condition may be caused by either of the bank 2 (front bank) timing belt camshaft sprockets being cracked near the base of the tooth area of the camshaft sprocket. Refer to the illustration shown.
Correction
To correct this condition, replace both bank 2 (front bank) timing belt camshaft sprockets. Refer to service procedure in this bulletin.
Service Procedure
1. Disconnect the negative battery cable. Refer to "Battery Negative Cable Disconnect/Connect" procedure in the Engine Electrical section of the 2005 Saturn L-Series Service Manual, Vol. 1.
2. Remove the air cleaner assembly. Refer to "Air Cleaner Assembly Replacement" procedure in the Engine Controls - 3.0L (L81) section of the 2005 Saturn L-Series Service Manual, Vol. 1.
3. Remove the front timing belt cover. Refer to "Front Timing Belt Cover Replacement" procedure in the Engine Mechanical - 3.0L (L81) section of the 2005 Saturn L-Series Service Manual, Vol. 1.
4. Remove the timing belt. Refer to "Timing Belt Replacement" procedure in the Engine Mechanical - 3.0L (L81) section of the 2005 Saturn L-Series Service Manual, Vol. 1.
5. Remove the camshaft drive sprockets. Refer to "Camshaft Drive Sprocket Replacement" procedure in the Engine Mechanical - 3.0L (L81) section of the 2005 Saturn L-Series Service Manual, Vol. 1.
Important:
When installing the # 3 camshaft drive sprocket, make sure that the # 3 alignment slot on the camshaft sprocket is installed onto the # 3 camshaft alignment pin. When installing the # 4 camshaft drive sprocket, make sure that the # 4 alignment slot on the camshaft sprocket is installed on to the # 4 camshaft alignment pin. Failure to do so may result in the engine being timed incorrectly.
6. Install new camshaft drive sprockets, P/N 90573286, using new camshaft sprocket bolts, P/N 90573287. Refer to "Camshaft Drive Sprocket Replacement" procedure in the Engine Mechanical - 3.0L (L81) section of the 2005 Saturn L-Series Service Manual, Vol. 1.
7. Install the timing belt. Refer to "Timing Belt Replacement" procedure in the Engine Mechanical - 3.0L (L81) section of the 2005 Saturn L-Series Service Manual, Vol. 1. Be sure to perform both inspection and installation procedures in the "Timing Belt Replacement" procedure.
8. Install the front timing belt cover. Refer to "Front Timing Belt Cover Replacement" installation procedure in the Engine Mechanical - 3.0L (L81) section of the 2005 Saturn L-Series Service Manual, Vol. 1.
9. Install the air cleaner assembly. Refer to "Air Cleaner Assembly Replacement" installation procedure in the Engine Controls - 3.0L (L81) section of the 2005 Saturn L-Series Service Manual, Vol. 1.
10. Connect the negative battery cable. Refer to "Battery Negative Cable Disconnect/Connect" procedure in the Engine Electrical section of the 2005 Saturn L-Series Service Manual, Vol. 1.
11. Verify that noise condition has been eliminated.
Parts Information
Claim Information
To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System for J0837 - Left (Front) Bank Intake or J0838 - Left (Front) Bank Exhaust. An Add time of 0.1 hr to Replace Additional Sprocket is provided. (NOTE: Only claim one of the Labor Operations, with the additional Add Time for any repairs.)
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