Engine - Rattling Noise At 1800-3000 RPM
21 11 07October 14, 2011
2024061 *Supersedes T.B. V211105 dated July 7, 2011 to include 4Motion repair procedure.*
Updated information is noted by asterisks and yellow shading
Vehicle Information
Rattling Noises from Engine Compartment Area or Exhaust System
Customers may complain of a rattling noise from engine or exhaust area while accelerating from 1800-3000 RPM.
In order to complete proper diagnosis and ensure that the noise is coming from the turbocharger, use the following procedure:
1. Ensure that there is no physical internal or external damage to the turbocharger. If damage is observed, continue diagnosis and repair as necessary. If no damage is observed, proceed to step 2.
2. Test drive the vehicle to duplicate and familiarize yourself with the noise. Noise can typically be duplicated by driving up a moderate incline, beginning at 35 mph in 4 gear (manual or automatic transmission) and accelerating through the RPM range of 1800-3000 RPM under moderate to heavy throttle. Obey all local traffic laws.
Note
3. Once you have confirmed and familiarized yourself with the noise, attach retaining clip Part No. 06J145220A (Figure 1).
Technical Background
Because of exhaust gas pulsations the wastegate flap and actuator rod vibrate at the introduction of boost pressure.
Production Solution
No improvements made to production.
Service
Procedure 1
Warning
^ Secure and raise vehicle for access to rear of turbocharger.
^ Attach tension clip as shown in figures 2, 3, 4, 5 and 6.
^ Ensure rod and clip travel without restriction.
Note
Clip expansion should not exceed 14mm or damage to clip will occur. Reference figure 3 area 1 is spread to 10.5mm Refer to Fig 4 and 5 for proper clip position.
^ Test drive vehicle to ensure repair.
If after attaching clip to the actuator rod, the noise has not changed, continue diagnosis and repair as necessary.
Note:
Leave clip installed as it should not be reused due to stretching during installation.
*Procedure 2 - 4Motion*
^ Raise and support vehicle.
^ Remove lower engine cover.
^ Disconnect right from stabilizer bar link, see Repair Group 40 in ElsaWeb. Remove right front drive axle, see Repair Group 40 in ElsaWeb.
^ Remove front differential support stud bolts.
^ Remove turbocharger lower support bracket.
^ Install clip, part number 06J145220A following the guide lines listed in procedure 1.
^ Reassemble vehicle.
^ Test drive vehicle to ensure repair.
If after attaching clip to the actuator rod, the noise has not changed, continue diagnosis and repair as necessary.
Warranty
Required Parts and Tools
No Special Tools required.
Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or removal.
Always check with your Parts Dept. and Repair Manuals for the latest information.