Technical Service Bulletin
Topic

Engine Overheating - Warning in the DIP | V8 Kovomo

Market area

Bentley: worldwide (2WBE),China 723 Volkswagen (Anhui) Automotive CO (6723),China 796
VW Import Comp. Ltd (Vico), Beijing (6796)

Brand

Bentley

Transaction
2061369/11
No.
Level

EH

Status

Released for publishing

Release
date

Dec 10, 2025

New customer code

Object of complaint

Complaint type

engine -> cooling system -> engine cooling fan wheel

noises, vibrations -> too
loud

engine -> cooling, lubrication -> engine coolant temperature
regulation

functionality -> faulty

engine -> cooling system

functionality

Vehicle data
V8 Kovomo Engine
Sales types

Type

MY

Brand Designation Engine code Gearbox code Final drive code

3S32CB 2020 E

*

*

*

3S32CB 2021 E

*

*

*

3S32CB 2022 E

*

*

*

3S32CB 2023 E

*

*

*

3S32CB 2024 E

*

*

*

3S34CB 2023 E

*

*

*

3S34CB 2024 E

*

*

*

3S42CB 2020 E

*

*

*

3S42CB 2021 E

*

*

*

Position

3S42CB 2022 E

*

*

*

3S42CB 2023 E

*

*

*

3S42CB 2024 E

*

*

*

3S44CB 2023 E

*

*

*

3S44CB 2024 E

*

*

*

4V14D9 2018 E

*

*

*

4V14D9 2019 E

*

*

*

4V14D9 2020 E

*

*

*

4V14D9 2021 E

*

*

*

4V14D9 2022 E

*

*

*

4V14D9 2023 E

*

*

*

4V14D9 2024 E

*

*

*

4V14D9 2025 E

*

*

*

4V14D9 2026 E

*

*

*

4V15D9 2024 E

*

*

*

4V15D9 2025 E

*

*

*

4V15D9 2026 E

*

*

*

ZG22CB 2021 E

*

*

*

ZG22CB 2022 E

*

*

*

ZG22CB 2023 E

*

*

*

ZG22CB 2024 E

*

*

*

ZG24CB 2023 E

*

*

*

ZG24CB 2024 E

*

*

*

ZV14D9 2023 E

*

*

*

ZV14D9 2024 E

*

*

*

ZV14D9 2025 E

*

*

*

Documents
Document name
master.xml

Technical Service Bulletin
Engine Overheating - Warning in the DIP | V8 Kovomo

Transaction No.: 2061369/11
Release date: Dec 10, 2025

Condition
One or a combination of the following symptoms are evident
•

Engine overheat warning in the DIP (Engine overheating)

•

Unusual cooling fan operation at high temperatures

•

P19F700: Low engine coolant temperature indicator lamp coolant too warm

•

Signs of coolant in the vacuum hoses for switch valve N649

Technical Background
To allow the engine coolant to heat as quickly as possible (from cold start) coolant delivery from the
mechanical coolant pump is interrupted by switch valve N649
Figure 1 - Bentayga

Figure 1

Figure 2 - New Continental GT/ GTC and Flying Spur

Figure 2

NOTICE
The correct operation of N649 (Figure 3) is as follows
Un-energised state (Ignition off) - Coolant pump connected to vent connection (red arrows)
Energised state (Ignition on) - Engine vacuum connection to coolant pump (yellow arrows)

Figure 3

Revision history
TPI 2061369/9
The warranty instructions have been revised, and the thermostat is only advised to be replaced when the
current part number fitted to the vehicle is level B or earlier.
The TPI has been updated to include the latest model years.
TPI 2061369/10
The VIN cut off has been removed.
A hydrocarbon (block) test has been added to the measure section.
Coolant residue information added to the measure section.

Production Solution
Not applicable

Service
1) Inspect the engine bay for any coolant residue
When inspecting the engine bay coolant residue can sometimes be seen around the reservoir when the
engine has overheated (figure 4).

Figure 4
If this condition is found, the coolant may also be below the minimum level.
NOTICE
If coolant residue is found in the engine bay, please raise a full technical DISS query and attach a
photograph of the coolant residue. If the coolant level is below the minimum level please also attach
photographic evidence of this.
2) Using ODIS check to confirm that no DTC’s are evident relating to low coolant or overheating issues in
particular
•

Save the current ODIS log online

•

Take a photo of any coolant related warnings which are evident within the DIP

•

Take a photo of any suspected coolant leaks

3) Perform a block (hydrocarbon) test
CAUTION
Before performing the block test ensure the test liquid is within its expiry date and is deep blue in colour
Note: Take photographs or record a video both before and after the block test.

If the test liquid changes colour the block test has failed, please raise a full technical DISS query with the
photographs or videos attached.
4) Disconnect each vacuum hose from N649 - Check for traces of coolant within the hoses - Refer also to
the video on the Bentley Hub referencing TPI 2061369/Note: Take photos or record a video of any coolant in the vacuum hoses or N649 and attach them to a new
or existing DISS query for reference purposes
CAUTION
DO NOT use compressed air to attempt to remove moisture from the vacuum lines (allow the moisture to
evaporate) damage to other components and unintentional disconnection of vacuum hoses can occur if
compressed air is used
Should moisture be evident or N649 does not hold vacuum the symptoms described are related to a
defective coolant pump. To eliminate a repeat repair the operative must conduct the remaining instructions
to completion
•

Referring to Rep.Gr 19 - Replace parts listed below
NOTICE

ONLY REPLACE THE COOLANT REGULATOR (THERMOSTAT) IF THE CURRENT PART NUMBER
FITTED TO THE VEHICLE IS 0P2.121.115.B OR EARLIER
Coolant pump
Coolant regulator (Thermostat)
Switch valve for mechanical coolant pump N649

Ensure all procedures within the repair manual are followed regarding wheel alignment and calibrations to
driver assist systems (Depending on vehicle specification)
•

On completion conduct a road test to confirm the issue is resolved

Warranty
Warranty type

110 or 910

Damage service number 21 69
Damage code

00 17

All Models
Time to replace the switch valve for mechanical coolant pump solenoid N649
Labour operation code

19 85 19 22

Time

30 TU

Time to replace the Coolant regulator (Thermostat)
Labour operation code
Time
Road test

19 58 19 71
40 TU

Labour operation code

01 21 00 00

Time

50 TU

Time to replace the coolant pump (Depending on model)

Bentayga
87 34 19 20 - 860 TU - HVAC compressor remove/install (Includes front end module remove/install)
13 75 19 70 - 40 TU - Crank pulley remove/install
19 50 19 70 - 120 TU - Coolant pump remove/install (Includes regulator housing remove/install)
21 41 19 71 - 30 TU - Pressure pipe remove / install
24 34 19 71 - 20 TU - Throttle valve remove / install

New Continental GT / C
50 38 19 20 - 740 TU - Front end module remove/install
13 75 19 00 - 140 TU - Crank pulley remove/install
19 55 19 00 - 310 TU - Regulator housing remove/install
19 50 19 00 - 210 TU - Coolant pump remove/install

New Flying Spur
50 38 19 20 - 770 TU - Front end module remove/install
13 75 19 00 - 140 TU - Crank pulley remove/install
19 55 19 00 - 260 TU - Regulator housing remove/install
19 50 19 00 - 170 TU - Coolant pump remove/install

Due to various vehicle types and specifications the operative must refer to the Labour operations section
within Elsa pro for Labour operation codes for the Wheel alignment and the alignment/calibration of all
applicable Driver assist systems

Required Parts and Tools
New Continental GT / GTC and New Flying Spur

Description

Part number

Quantity

Switch valve N649 06H 906 283B 1

Bentayga
Description

Part number

Quantity

Switch valve N649 7PP 906 283F 1

All models
Description

Part number

Quantity

Coolant pump

0P2 121 014H

1

Coolant regulator (Thermostat)

Refer to ETKA

1

Coolant

Refer to ETKA

As required (Refer to Elsa Pro for quantities)

All part numbers listed are correct at the time of publishing, please always refer to the ETKA parts catalogue
for latest part number information