Technical product information
Engine overheating - Warning on the DIP - V8 Kovomo
Australia E04 Bentley rest Asia and Australia (6E04),China 723 Volkswagen (Anhui) Automotive CO (6723),China 796 VW Import
Comp. Ltd (Vico), Beijing (6796),Germany E02 Bentley rest Europe (6E02),Japan E03 Bentley Japan (6E03),Korea, (South) E08
Bentley South Korea (6E08),United Arab Emirates E06 Bentley Middle East and Africa (6E06),United Kingdom E01 Bentley UK
(6E01),United States E05 Bentley USA and rest America (6E05)
Bentley

Topic
Market
area

Brand
Transaction
2061369/6
No.
Level
EH
Status
Approval
Release
date
New customer code

Object of complaint
engine -> cooling, lubrication -> engine coolant temperature control
engine -> cooling system
engine -> cooling system -> engine cooling fan

Complaint type
Position
functionality -> faulty
functionality
noise, vibration -> too loud

Vehicle data
Bentayga-New Continental GT/C-New Flying Spur (V8 Kovomo)
Sales types
Type
3S32CB
3S32CB
3S32CB
3S32CB
3S34CB
3S42CB
3S42CB
3S42CB
3S42CB
3S44CB
4V14D9
4V14D9
4V14D9
4V14D9
4V14D9
4V14D9
ZG22CB
ZG22CB
ZG22CB
ZG24CB
ZV14D9

MY
2020
2021
2022
2023
2023
2020
2021
2022
2023
2023
2018
2019
2020
2021
2022
2023
2021
2022
2023
2023
2023

Brand Designation Engine code Gearbox code Final drive code
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*

Documents
name

INTERNAL

Customer statement / workshop findings
Customer statement
•

Customer reports an engine overheat warning within the DIP

•

Engine overheating

•

Unusual cooling fan operation at high temperatures

•

There are no obvious signs of coolant leaks both internally or externally

Workshop findings
•

P19F700: Low engine coolant temperature indicator lamp Coolant too warm

•

Signs of coolant in the vacuum hoses (Refer to the video on the Bentley Hub referencing TPI 2061369/-

Technical background
•

To heat the engine as quickly as possible during cold starting, delivery of coolant from the coolant pump is interrupted in the warm-up
phase by the switch valve for mechanical coolant pump N649 for the mechanical coolant pump

For illustration purposes only:
Figure 1 Shows Bentayga (Arrow)
Figure 2 Shows New Continental GT/ GTC and Flying Spur (Arrow)

Figure 1

INTERNAL

Figure 2
•

The switch valve for mechanical coolant pump N649 is designed to cut off the vacuum supply to the coolant pump when the engine reaches
maximum temperature, the vacuum cut off allows the engine to start circulating coolant by retracting a sleeve which is situated around the
coolant pump impeller

TIP: When the switch valve for mechanical coolant pump N649 is at fault (sticking open) the vacuum supply is constant, this
allows the sleeve to stay in position around the impellor which leads to the symptoms described within the Customer
statement/Workshop findings section of this TPI
•

Referring to Figure 3 the standard operation of N649 (with no operational issues) 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
INTERNAL

HINT: Figure 3 shows an example of N649 for photographic and reference purposes only
IMPORTANT: The switch valve for mechanical coolant pump N649 fails due to an internal leak from coolant pump causing
corrosion within the unit from coolant migration
In the event the symptoms are as described refer to the instructions within the Measure section of this TPI

Revision history - TPI 2061369/6
• Warranty accounting instructions amended for Bentayga

Production change
All vehicles post the following VIN’s should have the latest specification coolant pump fitted
However
In the event the issue is evident post the suggested VIN please raise a technical DISS query and await feedback before conducting any further
work
New Continental GT/C and New Flying Spur
SCBBZ53S6MC087175
Bentayga
SJAAL14V0MC036042

Measure
The following MUST be conducted when the engine coolant is at ambient temperature (cold engine)
1) Referring to Figures 1,2 and 3 - With care (visually monitor for any traces of coolant) disconnect each vacuum hose from the switch valve for
mechanical coolant pump N649
VERY IMPORTANT: If traces of coolant are evident during disconnection, take clear photos or record a clear video of any coolant in the vacuum
hoses or N649 and attach to a new or existing DISS query
•

Refer to the video on the Bentley Hub referencing TPI 2061369/- to check for any signs of coolant within the vacuum hoses

•

Where possible check and confirm N649 is sticking open and supplying a constant vacuum

TIP: Use a Mityvac or similar vacuum tool to check and confirm there are no vacuum related issues/leaks present within the
system
2) Referring to Rep.Gr 19 - Replace all of the following parts
•

Coolant pump

•

Coolant regulator (Thermostat)

•

Switch valve for mechanical coolant pump N649

NOTE: All of the afore listed parts MUST be replaced at the same time, the requirement to replace all parts is only applicable
when conducting the instructions within this TPI this is due to the required symptoms/criteria being met
IMPORTANT: Ensure the vacuum lines are free from moisture DO NOT use compressed air to attempt to remove moisture from the vacuum lines
(allow the moisture to naturally evaporate from the vacuum lines) as damage to other components and unintentional disconnection of vacuum
hoses can occur
Within the quoted Rep.Gr procedures there are single use items which must be replaced and not reused. Ensure that new
replacements are available prior to starting this procedure
Ensure all procedures within the Repair manual are followed including full wheel and alignments/calibrations which are
required for all applicable Driver assist systems (Depending on vehicle specification)
3) On completion conduct a road test to confirm the issue is resolved

INTERNAL

Warranty accounting instructions
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 N649
Labour operation code 21 69 19 22
Time
30 TU
Time to replace the Coolant regulator (Thermostat)
Labour operation code
19 58 19 70
Time
10 TU
Road test
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 - 10 TU - Pressure pipe remove / install
24 34 19 71 - 20 TU - Throttle valve remove / install
New Continental GT/C
50 38 19 20 - 720 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

Parts information
New Continental GT/GTC and New Flying Spur
Description

Part number Quantity

Switch valve for mechanical coolant pump N649 06H 906 283B 1

INTERNAL

Bentayga
Description

Part number Quantity

Switch valve for mechanical coolant pump N649 7PP 906 283F 1
All models
Description

Part number

Quantity

Coolant pump
Coolant regulator
(Thermostat)

0P2 121 014H 1
Refer to ETKA 1

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

INTERNAL