Steering Rattling Noise in Footwell Area
Cayenne1/04 4822
Binder - 4, Running Gear
Date: 3-26-04
Rattling Noise In The Area Of The Steering Shaft and Driver's Footwell
Vehicle Type:
Cayenne/Cayenne S/Cayenne Turbo
Model Year:
Model Year: As of '03 (3)
Concerns:
Rattle from steering shaft bearing on upper universal joint and preloading the steering shaft bearing to compensate for the play.
Information:
Rattling noise may occur in the vicinity of the steering shaft and the driver's footwell when driving the models Cayenne (V6), Cayenne S and Cayenne Turbo over an uneven road surface (e.g. cobblestones) within the speed range of between 18 - 24 mph (30 - 40 km/h). The reason for this is the play between the steering shaft and the steering shaft bearing on the upper universal joint.
On vehicles with complaints of this type, the steering shaft bearing on the upper universal joint must be preloaded to compensate for the play.
Parts information:
Part Number Description
N 023 003 8 Fastening Nut M8
Tools:
12 point socket 8 mm
Ratchet - 3/8" with extension
Open-end wrench a/f 13
Torque wrench
Vise-grips (mm. span 50 mm)
Torx socket wrench T30
Work Procedure:
1. Preparatory work.
1.1 Raise the vehicle on a vehicle hoist until the the front wheels are completely off the ground.
1.2 Remove the cover in the driver's footwell under the instrument panel. See Cayenne Technical Manual, Group 7, Repairs: 702219 - Removing and installing cover under the instrument panel.
1.3 Release and pull off the plug on the brake light switch (Fig. 1, Item B), unclip the cable holder (Fig. 1, Item C).
1.4 Remove the brake light switch holder (Fig. 1, Item A).
Note:
The brake light switch doesn't need to be removed.
1.5 Unscrew the steering shaft fastening screw (Fig. 2, Item D), completely unscrew the nut and replace with a new fastening nut (Part No. N 023 003 8). The screw does not need to be removed.
1.6 Tighten the screw connection until only the bearing housing can still be moved in the direction of the arrow (Fig 2. item E) with slight resistance.
1.7 In order to use the vise-grip wrench on the upper universal joint in the following step, the steering shaft must be turned until the upper fork of the universal joint is in a horizontal position (Fig 3, Item H).
1.8 As shown in Figure 4, use your finger to push carefully and with minimum farce - the bearing housing in the direction at the steering wheel (Fig. 4. arrow) as far as it will go. The steering shaft must not move while doing this. The starting position far the following steps has now been established.
2. Preloading the steering shaft bearing to compensate for the play.
2.1 Close the vise-grip wrench at the handle. Pre-adjust the span of the wrench jaws to approx. 50 mm using the adjustment screw on the end of the wrench's handle (Fig. 5).
Caution!
Danger of damage to the bearing on the upper universal joint by preloading with excessive force.
> The vise-grip wrench must be closed at the handle before applying it to the universal joint and the bearing. Use the adjustment screw on the end of the vise-grip wrench's handle to open the jaws until the wrench can be applied to the universal joint and the bearing.
> Preload the bearing only via the adjustment screw on the vise-grip wrench.
2.2 Apply the vise-grip wrench to the universal joint and the upper edge of the bearing housing as shown in the picture (Fig. 6, Item F). When applying the wrench to the steering shaft bearing, ensure that wrench is not seated on the collar of the steering shaft.
2.3 Use the adjustment screw to close the vise-grip wrench until the jaws fit perfectly and with no play, without altering the position of the bearing.
2.4 By continuing to turn the vise-grip wrench's adjustment screw (Fig. 7, arrow), close the jaws until the steering shaft bearing has moved approx. 0.5 mm in the direction of the universal joint. The measurement of approx. 0.5 mm is sufficient to compensate for the play between the steering shaft bearing and the steering shaft.
Note:
Use only the adjustment screw when preloading the bearing with the vise-grip wrench.
2.5 Hold the wrench in this position and tighten the fastening screw on the steering shaft (Fig. 8, Item G). Tightening torque: 20 Nm (14.8 ftlb.)
2.6 Open the vise-grip wrench and remove it.
2.7 Check the steering shaft bearing for noises by turning the steering wheel over the maximum angle without steering assistance (engine off).
2.8 If grinding noises occur or the bearing is intermittently catching or is running roughly. the bearing has been preloaded too tightly. In this case, the steps starting from step 1, must be carried on again.
2.9 Continue with step 3 Reassembly if the following conditions are met:
a. If no noises are heard
b. the bearing is neither catching nor running roughly
c. the bearing is sufficiently pre-loaded
3. Reassembly
3.1 Install the brake light switch holder and push the electrical plug connector for the brake light switch into the brake light switch until it snaps into place. Clip the electrical wire back to The brake light switch holder.
3.2 Check the operation of the brake light switch.
3.3 Install the cover in the driver's footwell under instrument panel. See Cayenne Technical Manual, Group 7, Repairs: 702219 - Removing and installing cover under the instrument panel.
3.4 Remove vehicle from the lifting platform.
Working Time:
Literature:
Cayenne Technical Manual,
Group 7:
> Repairs: 702219 - Removing and installing cover under the instrument panel
Group 9:
> Repairs: 943619 - Removing and installing stop light switch
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