Chevrolet Cruze Repair Manual: Air/Wind Noise
Special Tools
- CH-39570 Chassis Ear
- GE-41416 Ultrasonic Leak Detector
Warning: Refer to Assistant Driving Warning in the Preface section.
To analyze a reported windnoise condition, test drive the vehicle to determine the origin of the noise.
Choose a regular route with smooth and straight streets that run in all 4 directions: North, South, East, and West. The area should have little traffic or little noise in order to eliminate interference with the test.
Note: Often there is one primary leak source and one or more secondary leaks that contribute to the noise condition. Repairing only one of the contributing leak sources may not completely repair the total condition but only reduce the condition.
Drive the vehicle at the speed in which the noise was noticed, or until the noise is heard. Maintain safe and legal speeds.
Many of the waterleak diagnosis tests are also used for the windnoise diagnosis.
Most windnoise is caused either by leaking seals or by misaligned body surfaces. You can diagnose the following types of windnoise with the aid of CH-39570 Chassis Ear or GE-41416 Leak Detector .
- Wind whistle
- Wind roar
- Wind rush
When moving at highway speeds, air pressure inside the vehicle becomes greater than the air pressure outside. When a leak occurs, the escaping air causes a hiss or a whistle.
Wind roar occurs when air passes over or through an opening between the 2 body surfaces. To correct the condition, adjust the alignment to the body surfaces.
Wind rush occurs when air presses over the vehicle's body, and is related to the aerodynamics of the vehicle. Wind whistle and wind roar are repairable. Rule out wind whistle and wind roar before concluding that the wind noise is due to wind rush.
Use the following inspections in order to aid in diagnosing wind whistle or wind roar:
- Note the details for wind noise:
- The perceived location
- The location where the noise is loudest
- When the noise occurs
- The vehicle speed
- The interior fan speed
- The position of the windows
- What the noise sounds like
- Inspect the vehicle for the possible cause of the windnoise.
- Test drive the vehicle and determine if the windnoise is external or internal.
- Perform a visual inspection of the following components:
- Loose fasteners
- Torn weatherstrips
- Broken weld joints
- Sealer and/or adhesive skips
Lifting and Jacking the Vehicle
Note: The use of a LOW PROFILE LIFT ARMS SYSTEM may be required to
avoid unwanted contact with the vehicle's body and structure
depending on lifting equipment used. Refer to the manufacture's recom ...
Tracing Powder or Chalk Test
Clean the weatherstrips and the contact surfaces with cleaning solvent.
Apply powder or chalk in an unbroken line to the contact surface of the
weatherstrip surrounding the perimeter of the sus ...
Other materials:
Uniform Tire Quality Grading
Quality grades can be found where applicable on the tire sidewall between tread
shoulder and maximum section width. For example:
Treadwear 200 Traction AA Temperature A
The following information relates to the system developed by the United States
National Highway Traffic Safety Administration ...
Front Fog Lamp Replacement
Preliminary Procedures
Raise and support the vehicle. Refer to Lifting
and Jacking the Vehicle.
Remove the front bumper fascia. Refer to Front Bumper Fascia
Replacement.
Disconnect fog lamp bulb socket electrical connector.
Front Fog Lamp Screws (Qty: 3)
Caution: Refer t ...
Tire Designations
Tire Size
The following is an example of a typical passenger vehicle tire size.
(1) Passenger (P-Metric) Tire: The United States version of a metric tire
sizing system. The letter P as the first character in the tire size means a passenger
vehicle tire engineered to standards set by the U.S. ...