Warning:Refer toAssistant Driving Warning.
Interior windnoise is not heard when the window is lowered.Interior windnoise is caused by the air leaving the inside of thevehicle through a seal or a seam.
Tape over the relief valves to cause added air pressurewithin the vehicle.Test drive the vehicle and listen for windnoise or awhistle.Pull the vehicle over and make the temporary repairs usingmasking tape. If you cannot determine the source of the windnoise,perform one or more of the following diagnostic tests:Air Pressure TestSoap Suds or Bubble TestTracing Powder or Chalk TestValve and Seat Grinding Seats
Valve Measurement and Reconditioning OverviewProper valve service is critical to engine performance.Therefore, all detailed measurement procedures must be followed toidentify components that are out of specification.If the measurement procedures reveal that the valve or valveseat must be recondition ...