Technical product information
Topic
Market area
Brand
Transaction No.
Level
Status
Release date

Engine overheating - Warning on the DIP - V8 Kovomo
Bentley: worldwide (2WBE)
Bentley
2061369/4
EH
Approval

New customer code
Object of complaint

Complaint type

engine -> cooling, lubrication -> engine coolant temperature control functionality -> faulty
engine -> cooling system
functionality
engine -> cooling system -> engine cooling fan
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
ZG22CB
ZG24CB
ZV14D9

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

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

Documents
Document name
master.xml

INTERNAL

Gearbox code
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*

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

Position

Technical product information
Engine overheating - Warning on the DIP - V8 Kovomo

Transaction No.: 2061369/4

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
Revision history - TPI 2061369/4
• TPI revision made to include the replacement of the switch valve for mechanical coolant pump N649, mechanical coolant pump and the
coolant regulator (Thermostat)
•

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)

INTERNAL

Figure 3
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

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

INTERNAL

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

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 (Use 99 index until 15/12/22)
Time
10 TU
Road test
Labour operation code 01 21 00 00
Time
50 TU
Time to replace the coolant pump (Depending on model)

Benatayga
19 20 50 38 - 800 TU - 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**
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

INTERNAL

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

Description

Part number

Quantity

Switch valve for mechanical coolant pump
N649

7PP 906 283F

1

Bentayga

All models
Description

Part number

Quantity

Coolant pump

0P2 121 014H

1

Coolant regulator (Thermostat) 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