G6 L4-2.4L VIN B (2006)
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. The noise may not be engine related. This step is to verify that the engine is making the noise. If the engine is not making the noise do not proceed
further with this table
3. The noise may be an internal engine noise. Removing the drive belt and operating the engine for a brief period will verify the squeal noise is the
drive belt or an accessory drive component. When removing the drive belt, the water pump may not be operating and the engine may overheat.
Also DTC's may set when the engine is operating with the drive belt removed.
4. This test is to verify that an accessory drive component does not have a seized bearing. With the belt removed, test the bearings in the accessory
drive components for turning smoothly. Also test the accessory drive components with the engine operating by varying the load on the components
to verify that the components operate properly.
5. This test is to verify that the drive belt tensioner operates properly. If the drive belt tensioner is not operating properly, proper belt tension may not
be achieved to keep the drive belt from slipping which could cause a squeal noise.
6. This test is to verify that the drive belt is not too long, which would prevent the drive belt tensioner from working properly. Also if an incorrect
length drive belt was installed, the belt may not be routed properly and may be turning an accessory drive component in the wrong direction.
7. Misalignment of the pulleys may be caused from improper mounting of the accessory drive component, incorrect installation of the accessory drive
component pulley, or the pulley bent inward or outward from a previous repair. Test for a misaligned pulley using a straight edge in the pulley
grooves across 2 or 3 pulleys. If a misaligned pulley is found refer to that accessory drive component for the proper installation procedure for that
pulley.
8. This test is to verify that the pulleys are the correct diameter or width. Using a known good vehicle compare the pulley sizes.