Problem Description and Possible Solution
The timing belt
tensioners may make a rattling noise at a higher mileages. This is due to the adjustment being at its limit. Our technicians tell us that range of the adjuster may be lengthened by elongating the slot where the spring attaches by 2-3 mm to remedy this problem.
Average mileage: 187,990 (80,000–267,000)
Engines affected: 2.2L 4 Cylinder, 3.5L V6
18 people reported this problem
Heard the squeaking/rattling after I had spark plugs replaced and coolant flush with new thermostat. The noise only occurs first starting the car when it's sat several hours and cooled off. Once warm it went away. Eventually my alternator went out. Took it to dealership for repair/replacement. Sound is gone. Obviously to me at least, was the alignment of the belt and/or pullies were off leading to failure.