Range Rover (LP) V8-4.0L (1999)
Idler Pulley: All Technical Service Bulletins
Engine - Whining Noise
No.: 12/04/99/NAS
Ref:
Issue: 1
Date: 09/03/99
RH Serpentine Belt Idler Pulley Noise
AFFECTED VEHICLE RANGE:
Range Rover (LP)
XA410483 onwards
SITUATION:
WHINE FROM UNDER THE HOOD AT IDLE
A customer may complain of a whining noise which disappears when the engine speed is raised above approximately 1100 rpm.
The alternator may be mistakenly identified as the source of this noise.
RESOLUTION:
REPLACE AUXILIARY DRIVE SYSTEM COMPONENTS TO RESOLVE RESONANCE
On customer complaint of the whining noise, investigate the source. Upon determination that the idler pulley is at fault, replace the auxiliary drive belt
and idler pulley with the specified parts.
PARTS INFORMATION
TOOLS REQUIRED
WARRANTY CLAIMS
Normal warranty policy and procedures apply.
REPAIR PROCEDURE
NOTE:
All vehicles have two idler pulleys. Only the pulley adjacent to the drive belt tensioner is to be replaced. That pulley is indicated with an arrow
in the illustration.