Technical Service Bulletin
Topic
Market area
Brand
Transaction No.
Level
Status
Release date

Mulsanne steering shimmy/vibration - 21 Inch wheels only (USA)
United States E05 Bentley USA and rest America (6E05)
Bentley
2030349/3
EH
Released for publishing
May 20, 2019

New customer code
Object of complaint
chassis -> steering
chassis -> wheels, tires, tire pressure monitoring -> tires -> tire tread
chassis -> steering, steering assist -> steer
chassis -> steering, steering assist
chassis -> wheels, tires, tire pressure monitoring
chassis -> wheels, tires, tire pressure monitoring -> tires

Complaint type
Position
noises, vibrations
appearance, surface -> bulge
> no instruction <
noises, vibrations -> vibrating
functionality
noises, vibrations
component, automotive fluids -> installed incorrectly

New workshop code
Object of complaint
chassis -> wheels, tires, tire pressure monitoring -> tires
chassis -> wheels, tires, tire pressure monitoring -> tires
chassis -> wheels, tires, tire pressure monitoring -> tires
chassis -> wheels, tires, tire pressure monitoring -> tires
chassis -> wheel suspension, suspension, damping -> axle body bearing
chassis -> steering -> steering column brace
chassis -> wheels, tires, tire pressure monitoring -> tires

Complaint type
component, automotive fluids -> out of balance
component, automotive fluids -> out of balance
component, automotive fluids -> out of balance
component, automotive fluids -> out of balance
component, automotive fluids -> incorrect
noises, vibrations -> noise
component, automotive fluids -> installed incorrectly

Vehicle data
Bentley Mulsanne
Sales types
Type
3Y2*
3Y2*
3Y2*
3Y2*
3Y2*
3Y2*
3Y2*
3Y2*
3Y2*
3Y2*

MY
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020

Brand Designation Engine code Gearbox code
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*

Documents
Document name
master.xml

Final drive code
*
*
*
*
*
*
*
*
*
*

Position
left front
left rear
right rear
right front

> no instruction <

Technical Service Bulletin
Mulsanne steering shimmy/vibration - 21 Inch wheels only (USA)

Transaction No.: 2030349/3
Release date: May 20, 2019

Condition
This TPI is only applicable to Bentley Mulsanne fitted with 21 Inch wheels. This TPI is not applicable to vehicles fitted with Bentley 20
inch wheels, should 20 inch wheels be fitted please raise a DISS query.
Should a customer complain of steering wheel shimmy/vibration constantly above 80 kph/50 mph and the condition does not improve when driven
please proceed with this TPI. Should the vehicle exhibit different symptoms other than described please raise a DISS ticket.
This TPI also applies to all vehicles which are built and registered for use in the countries listed below
EGYPT – INDIA – LEBANON – SYRIA - SOUTH AFRICA

Technical Background
We are aware that under certain conditions of shipment and storage, particularly involving large changes in ambient temperature, a condition can
occur where the tread surface of the tyre forming the footprint on the road surface or container floor partly retains the relatively flat form when
driven and does not immediately restore to a constant radius. Hence the name of flat spotting which is generally given to this condition.
Flat spotting should not be confused with out of balance, out of round or radial force variation. It is very important that the diagnosis and correction
of these different conditions are not confused with each other. Attempting to correct flat spotting by rebalancing the assembly will not correct the
problem and worse still, when the flat spots are removed the tyres will then be out of balance.
ATTENTION: During this TPI the Workshop Manual is quoted to help in carrying out various tasks, it is recommended that the procedures
referenced are checked by the operative as the process within the Workshop manual may have changed since last viewed.

Production Solution
Improved Manufacturing, shipping and transportation procedures have been introduced.
Referring to Figure 1, from VIN SCBBA63Y9BC016115 the front suspension lower lever inner rear bushes with a higher damping frequency were fitted
at the time of production.
Increased friction steering racks were fitted in production after VIN SCBBA63Y7CC016888

Figure 1

Service
Check the tyre specification and the date of manufacture code which is stamped on all four tyres, the correct specification tyre that
should be fitted is as follows:
- Dunlop SP Sportmaxx GT 265/40/21 with the part number 3Y0 601 313H or higher
- To ensure correct specification the Bentley Mulsanne tyre has a ‘B’ stamped on the sidewall as shown in Figure 2

Figure 2
Referring to Figure 3, check the date of manufacture code, the code must be on or after 2011, this code translates as week 20 of the
year 2011 hence 2011, Figure 3 shows 2811 which is week 28 year 2011.

Figure 3
Should your tyres not meet any of the aforementioned criteria regarding brand, specification and date code please bring the tyres up
to the correct specification before proceeding with this TPI, Refer to Workshop manual Rep.Gr 44. Please also observe the key points
detailed in point 3.
Should the tyres meet all criteria regarding tyre specification and date of manufacture please carry on with the TPI.
IMPORTANT: Do not initially balance the wheel and tyre assemblies, before commencing ensure the initial checks below are carried out
- Check the wheels and tyres for damage
- Check that Bentley approved 21 inch wheels are fitted and the tyres are to the correct specification
- Check the front and rear suspension for any damage and wear
- Check all steering components for damage and wear
1. Ensure the tyres are set at Normal pressure and adjust if required, drive the car until the flat spots come out or the flat spotting condition
improves, then drive for approximately 10 minutes at the lowest speed possible to allow cooling
- Within a maximum of two minutes of returning from the road test raise the vehicle off the ground
2. Remove all four wheel assemblies Refer to Workshop Manual Rep.Gr 44
3. Using the Hunter GSP 9712 (VAS 6230) vibration control balancer (or similar) force match and balance all four assemblies, the assembly Radial
Force Variation (RFV) should be no more than 85N after the force matching process has been conducted.
- To seat the tyre beads to the rim inflate to 3.5 Bar, once satisfied that the tyre beads are fully seated readjust to the correct measuring pressure of
3.0 Bar - Refer to Workshop Manual Rep.Gr 44 and also observe the following key points.
Does the vehicle have accessory valve caps fitted as shown in Figure 4? If Yes please ensure the force match and balance process is
always conducted with accessory valve caps fitted

Figure 4
IMPORTANT: Apply a thin smear of silicon based grease for example Dow Corning high vacuum grease to the external threads of the valve stem
prior to fitting the accessory valve cap. Grease should be applied any time the cap is removed and the grease is not evident
- For applicable Hunter machines, it is imperative that the adaptor cone with part number 158 F+ with a light Blue coloured face as shown in Figure 5.
- The cone must be fitted on the spindle as shown in Figure 6 ensuring the light Blue face of the cone is facing towards the end of the spindle
NOTE: Should the initial RFV reading be above 85 N this does not necessarily mean the assembly cannot be adjusted to within specified tolerance,
please ensure that the force matching process is adhered to as instructed within the workshop manual Rep.Gr 44 – Tyres – Checking condition and
replacement

Figure 5

Figure 6
Important: When conducting the Mulsanne wheel and tyre force matching process or the tyres need replacing, a specific tyre fitting lubricant should
be used. The lubricant is Rema Tip Top Anti Gliss Lube with the Bentley Part Number of RH 14530. On drying the Anti Gliss has adhesive properties
that increases friction between the tyre and wheel rim to prevent slippage. Please Refer to Workshop Manual Rep.Gr 44 Tyres - Checking Condition
and Replacement - Radial force variation - Best fit practice.
- Once the force matching process is complete, the assembly high spot is identified with a brown dash (Figure 7).

Figure 7
- Rotate the assembly on the spindle until the high point is at 12 o’clock and the Brown dash turns to Green (Figure 8).

Figure 8
- Mark the RFV high point with a paint pen or similar (Figure 9) this will be required when refitting the wheels

Figure 9
IMPORTANT: All four tyres must be no more than 85N after force matching and balancing should this not be achievable replace the applicable
tyres using Dunlop Sportmaxx GT 265/40/21 tyres with the part number 3Y0 601 313H or higher Refer to Workshop Manual Rep.Gr 44
4. Check the part number of the steering rack, if the part number on the existing steering rack is ‘F’ level suffix or lower replace the steering rack Refer to workshop manual Rep.Gr 48
NOTE: The Link loom with the part number 3Y0 970 089 will require fitting along with the latest level steering rack up to VIN SCBBA63Y7CC016888
as detailed in the workshop manual Rep.Gr 48 – Steering rack – To Remove and Fit.
NOTE: When refitting the wheels Refer to Workshop manual Rep.Gr 44 Tyres – Checking Condition and Replacement – Radial force variation – Best
fit practice
IMPORTANT: At this point a DISS query must be raised to authorise replacement bespoke front lower levers. If on receipt of the DISS query
Bentley Engineering consider the fitting of bespoke parts beneficial then the DISS query will contain the correct new part numbers for the lower lever
assemblies
5. If authorised above replace the right and left hand front suspension lower lever assembly’s Refer to Workshop Manual Rep.Gr 40 Front suspension,
drive shafts – Front Suspension Levers, Arms and Links – To Remove and Fit.
6. During new lower lever fitment incorporate the additional snubber parts into the assembly. These snubber parts are fitted to the rear bush (A figure
10) of both the left and right hand new lower levers. Snubber part number 3Y0407743, steel washer part number 3Y0407371A and steel washer part
number 3Y0407742A should be assembled as detailed in figure 11. Arrow F points to front of vehicle. All other information relating to fitting the lower
levers including torque tightening figures are unchanged and are therefore as detailed in the relevant section of the workshop manual.

Figure 10
.

Figure 11

Figure 11a
Note: Any vehicle authorised to have this bespoke lower lever fitted will require a label RH15238 applying to the lower lever ensuring
only these levers are fitted in the future see Figure 11a
NOTE: When refitting the wheels Refer to Workshop manual Rep.Gr 44 Tyres – Checking Condition and Replacement – Radial force variation – Best
fit practice
7. Place a Blue paint completion mark on the power steering reservoir bracket (Figure 12) to confirm the steering rack and the lower lever bushes (if
pre VIN SCBBA63Y9BC016115) have been replaced.

Figure 12
8. Drive the vehicle on the same route as previously covered and re-asses, should the condition still be evident please raise a DISS query and wait for
further instruction from Product Support. Should the issue now be rectified please return the car to the customer.

Warranty
Please Note: Normal Warranty policies are applicable.
Time to carry out the initial flat spot recovery process including the force matching and balancing process.
Warranty type

910 or 110

Labour Operation Code

44 40 94 00

Damage Service Number

44 40

Damage Code

00 13

Time

Shop time

Time to replace the steering rack.
Warranty Type

910 or 110

Labour operation code

48 40 19 50

Damage Service Number

48 40

Damage Code

00 13

Time

90 Time Units

Time to replace both the right hand side and left hand side lower levers.
Warranty Type

910 or 110

Labour operation code

40 17 56 99

Damage Service Number

40 17

Damage Code

00 13

Time

170 TU Time Units

Time to check and set the vehicle geometry without ACC.
Warranty Type

910 or 110

Labour operation code

44 95 03 00

Damage Service Number

44 95

Damage Code

00 13

Time

80 Time units

Time to check and set the vehicle geometry with ACC.
Warranty Type

910 or 110

Labour operation code

44 95 03 10

Damage Service Number

44 95

Damage Code

00 13

Time

180 Time units

Time to replace 2 Tyres.
Warranty Type

910 or 110

Labour operation code

44 40 56 00 *

Damage Service Number

44 40

Damage Code

00 13

Time

50 Time units

* Enter twice to allow 100Time Units for the replacement of all 4 tyres
Road Test.
Warranty Type

910 or 110

Labour operation code

01 21 00 00

Damage Service Number

48 10

Damage Code

00 13

Time

50 Time Units

Required Parts and Tools
Description Part
Number

Quantity

Anti Gliss

1 x 500 Gram tin can be used for multiple applications

RH 14530

Description

Part Number

Dunlop SP Sportmaxx GT 265/40/21

3Y0 601 313H or higher
always check for latest part
number in ETKA

Should tyres be required, please ensure the new tyres are of the correct specification as detailed within the Workshop Manual Rep.Gr
44 – Tyres – Checking, Condition and Replacement
Parts required when replacing Steering rack and lower lever bushes
Description

Part Number

Quantity

Steering rack (Left hand
drive)

3Y1 422 075N or higher
always check for latest part
number in ETKA

1

Steering rack (Right hand
drive)

3Y2 422 075M or higher
always check for latest part
number in ETKA

1

Link loom (Up to VIN
SCBBA63Y7CC016888)

3Y0 970 089

1

Sealing Washer (single use)

N013 849 5

2

Steering coupling bolt (single N105 184 05

1

use)
Hexagon Bolt (single use)

N105 029 02

4

Hexagon Bolt (single use)

N102 412 02

2

Self-locking Nut (single use)

N101 064 02

2

Track rod end Nut (single
use)

WHT 000 785A

2

Upright ball joint nut

WHT 003 822

2

Collared bolt

N911 422 01

4

Bolt

N104 253 02

2

Nut

N102 861 10

2

Bolt

N106 999 01

2

Power steering fluid

JNV 862 564F

2 Litres

Front lower lever LH

Detailed on DISS query

1

Front lower lever RH

Detailed on DISS query

1

Steel spacer rear bush

3Y0407371A

2

Steel spacer rear bush

3Y0407742A

2

Snubber

3Y0407743

2

Label

RH15238

2

The following parts require
authorisation prior to fitting

Additional Information
The customer may notice an initial difference in the feel of the steering, however this is normal, the difference is due to the fitment of the latest level
higher friction steering rack and lower lever bushes which have a higher damping frequency (Where applicable).
Bentley branded Tyre Cradles are now supplied as an approved Bentley accessory.
The tyre cradles have been designed and manufactured specifically for Bentley providing simple and effective tyre protection.
Tyre flat spotting can be caused by medium to long term storage or from parking after a long drive, especially where the tyre experiences large
changes in temperature.
To prevent flat spotting, tyres need to be cooled in a controlled manner to enable the tyre to restore to a constant radius.
Made from a unique polymer that moulds to the shape of the tyre the new Bentley Tyre Cradles maintain the tyre shape whilst cooling and in storage.
The tyre cradles are easy to use, simply drive the car onto them in the desired parking area