NHTSA ID Number: 10206339
Manufacturer Communication Number: 2065480/3
TSB/Document Date: 2022-01-08
Summary
V8 Kovomo - Bentayga - Valve spring replacement (SC21/42). Technical background: The intake valve springs (16) and outlet valve springs (16) located within the cylinder heads of Bank 1 and 2 require replacing The replacement of all valve springs is required due to an issue which was discovered during a routine quality inspection Remedy: The replacement of all intake valve springs and all outlet valve springs (Bank 1 and Bank 2) is required
As required
Refer to ETKA and Rep.Gr 00 (Engine fluids
and capacities)
As required
00004320935
Microgleit DF977S (Source locally)
As required
Loctite 7515 primer (Source locally)
As required
Tools
Refer to the attached instructions for all tooling requirements
Work
1) Referring to Rep.Gr 10 - Remove the engine and transmission
NOTE: Once the engine is removed there is not a requirement to separate the transmission from the engine, the replacement of
the valve springs should be conducted with the engine and transmission sitting on the hydraulic lifting table
CAUTION: Ensure the engine and transmission is suitably secured to the hydraulic lifting table
2) Referring to Rep.Gr 26 - Remove both catalytic converters and associated heatshields
3) Refer to the attached instructions ensuring each process is conducted in numerical order (1 through to 16) as follows:
Removal
1 - Remove rear high-pressure fuel line 2
- Remove upper chain housing covers 3 Remove oil mist separators
4 - Remove ignition coils
5 - Remove high pressure fuel lines, banks 1 and 2
6 - Remove high pressure fuel pumps
7 - Remove fuel rails
8 - Remove CDA solenoids
9 - Remove fuel injectors
10 - Remove mechanical vacuum pump
11 - Remove pressure pipes
12 - Remove camshaft actuators 13
- Remove cylinder head cover
14 - Remove valve lifters (hydraulic tappets) 15 Remove spark plugs
16 - Remove valve springs
NOTE: It is imperative the attached instructions are followed in numerical order as each task has been individually generated to allow the
operative to conduct the rework with minimal disruption
VERY IMPORTANT: The operative MUST ensure the valve springs are fitted in the correct location as the part numbers of the
Intake valves and Outlet valves are different.
TIP: To ensure consistency/accuracy during the replacement of the valve spring process and to ensure the springs are fitted in the
correct location, it is highly recommended the same operative is used for the duration of this process
•
06E 109 623AD - Intake valve springs - Figure 1 (Located on the outside edge of each bank)
HINT: Referring to Figure 1 - The valve spring is shown in the orientation as it should be fitted IMPORTANT: The 3 white lines shown/circled on
the upper face of the spring must be facing upwards when fitted
Figure 1
•
0P2 109 623 - Outlet valve springs - Figure 2 (Located on the inside edge of each bank)
HINT: Referring to Figure 2 - The valve spring is shown in the orientation as it should be fitted IMPORTANT: The 4 blue lines shown/circled on
the upper face of the spring must be facing upwards when fitted
Figure 2
TIP: When removing the original parts it is best practice to keep the new parts completely separate to eliminate cross contamination
HINT: Ensure all parts which are not required to be replaced (as part of this process) are inspected prior to refitting and replaced if required
VERY IMPORTANT: When replacing the valve springs (once the collets and valve spring cap is removed from each valve) it is
imperative that constant air pressure is supplied to the affected cylinder whilst the replacement of the valve springs is being
conducted, in the event the air supply is lost or is not maintained during this operation the applicable valve could drop
directly in the cylinder resulting in the possible requirement to remove the cylinder head to retrieve the valve
4) To complete the installation of the valve springs - Refer to the attached installation instructions in numerical order
VERY IMPORTANT: The operative MUST ensure the valve springs are fitted in the correct location as the part numbers of the
Intake valves and Outlet valves are different.
TIP: To ensure consistency/accuracy during the replacement of the valve spring process and to ensure the springs are fitted in the
correct location, it is highly recommended the same operative is used for the duration of this process
INSTALLATION
1 - Install valve springs
2 - Install spark plugs
3 - Install valve lifters (hydraulic tappets) 4
- Install cylinder head covers
5 - Install camshaft actuators (includes setting timing)
6 - Install pressure pipes
7 - Install mechanical vacuum pump
8 - Install fuel injectors
9 - Install cylinder deactivation solenoids 10
- Install fuel rails
11 - Install high pressure fuel pumps
12 - Install high pressure fuel lines, banks 1 and 2
13 - Install ignition coils
14 - Install oil mist separators
15 - Install upper chain housing covers
16 - Install rear high-pressure fuel line
5) Referring to Rep.Gr 26 - Refit both catalytic converters and associated heatshields
6) Referring to Rep.Gr 10 - Refit the engine and transmission
7) Carry out wheel alignment and ensure the driver assist system calibrations are performed (Depending on vehicle specification) as
follows
•
Vehicle front + rear measured wheel alignment checked
•
Rear wheel camber adjust
•
Rear wheel track adjust
•
Front wheel camber adjust
•
Front wheel track adjust
•
(ACC) - Radar sensor checked + adjusted
•
Overhead view camera adjusted
•
Driver assist camera adjusted
•
Control unit for (Lane change assist) adjusted
•
Night vision system calibration
•
Headlamps to adjust
8) Raise a non-technical DISS query attaching the following
•
Before and after screen shots of the wheel alignment results
•
Screen shots confirming the applicable drive assist systems have been successfully adjusted/calibrated
Warranty payments will not be approved without the submission of the requested results via the open DISS query
9) Conduct the PDI road test - On return confirm that no DTC’s are evident
10) Check and confirm that no DTC’s are stored or there are no engine operation issues evident - Save an online log to confirm that no DTC’s
were evident at this stage of the procedure
•
Referring to Figure 3
•
Select Guided functions from 01 – Engine Control Module 1
•
Select Generate readiness code
•
Select Execute
Figure 3
Please be aware that not all readiness bytes may be at zero, however this is not a requirement as the remaining bytes will set
during normal customer driving cycle routines
11) Confirm no oil/fluid leaks are evident
12) Place a green paint completion mark as shown within the Identification section (Figure 4)
Identification
Green paint completion mark on the 12 volt battery vent hose (Figure 4)
Figure 4
Repair instructions Notes
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1.
Install valve springs:
Special tools and workshop equipment required
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TSB/Document ID: 2065480/3
Replacement Service Bulletin Number:
MFR Communication Date: 2021-12-09
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:MECHANICAL
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- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
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