Technical product information
Coolant leaking from the mechanical coolant pump - Low coolant level warning - Engine overheating - DTC's evident
Russische Föderation (5RU),Australia E04 Bentley rest Asia and Australia (6E04),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
2065919/5
No.
Level
EH
Status
Approval
Release
date
New customer code
Object of complaint
engine -> cooling system
engine -> cooling system -> coolant
lighting system, signalling -> sound signals -> "coolant level" acoustic warning

Complaint type
Position
leaks
component / consumables -> too little
functionality -> activates

Vehicle data
W12 Bentayga - New Continental GT/GTC - New Flying Spur
Sales types
Type

MY Brand Designation Engine code Gearbox code Final drive code

3S31AB
3S31BB
3S31BB
3S31BB
3S31BB
3S31BB
3S31BB
3S31EB
3S31EB
3S31EB
3S41BB
3S41BB
3S41BB
3S41BB
3S41BB
3S41BB
3S41EB
3S41EB
3S41EB
4V14A9
4V14A9
4V14A9
4V14A9
4V14A9
4V14A9
4V14A9
4V14G9
4V14G9
4V14G9
4V14G9

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INTERNAL

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ZG21BB 2020
ZG21BB 2021
ZG21BB 2022
ZG21BB 2023
ZG26BB 2023

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Documents
Document name
master.xml

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Technical product information
Coolant leaking from the mechanical coolant pump - Low coolant level warning - Engine overheating - DTC's
evident

Transaction No.: 2065919/5

Customer statement / workshop findings
•

Coolant leaking from the mechanical coolant pump

Or
•

Coolant witness marks on the mechanical coolant pump although coolant is not leaking/dripping from the pump

Or
•

Low coolant level warning displayed within the DIP

Or
•

Engine overheating issues and/or DTC P218100: Cooling System Performance with symptom code 8113

CAUTION: In the event that DTC P218100: Cooling System Performance with symptom code 8113 is evident
Or
•

Air in the coolant DTC’s (various) are evident

The operative should also refer to TPI 2051893/-

Technical background
Revision history
TPI 2065919/5 - Revised instructions to include the replacement the Solenoid for coolant circuit N492 (Figure 1 ARROW) in conjunction with the
mechanical coolant pump

Figure 1
HINT: The operative MUST ensure the instructions within the Measure section are followed, the instructions differ slightly depending
on the mechanical coolant pump part number (B or C suffix)

Production change
The following mechanical coolant pump part numbers are affected:
•

07P 121 008B

•

07P 121 008C

INTERNAL

VERY IMPORTANT:
•

In the event a B level mechanical coolant pump is fitted and a replacement pump is required a non technical DISS query
is required

•

In the event a C level mechanical coolant pump is fitted and a replacement coolant pump is required a technical DISS
query is required to request permission from Product support before replacement

Measure
07P 121 008B or 07P 121 008C mechanical coolant pump fitted
The following should be conducted until instructed regardless of the mechanical coolant pump part number which is fitted
1) On receipt of the vehicle - Take a photograph of the coolant level within the coolant reservoir
•

Using ODIS check to confirm that no DTC’s are evident relating to low coolant or overheating issues in particular

DTC P218100: Cooling System Performance with symptom code 8113
Or
Air in the coolant DTC’s
•

Save the current ODIS log

•

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

•

Take a photo of any suspected coolant leaks

2) Referring to Rep.Gr 19 - Pressure test the coolant system to confirm if a coolant leak is evident from the mechanical coolant pump
VERY IMPORTANT: In the event the mechanical coolant pump is leaking/dripping as a result of conducting the coolant pressure
test - Record a clear video of the leak (whilst carrying out the pressure test)
Refer to the video located within the Bentley Hub reference TPI 2065919/- this video shows an example of a coolant pump with
no leak although there is a small coolant witness mark evident (Figure 2) in this scenario the coolant witness mark should be
cleaned off (using a suitable cleaning agent) to the condition shown in Figure 3

Figure 2

INTERNAL

Figure 3
In the event that coolant is not leaking from the mechanical coolant pump whilst conducting the pressure test the operative must
conduct Step 3 (road test) to confirm if a coolant leak is evident or not
However
If a coolant leak is evident whilst conducting the pressure test the operative must go to Step 4
3) Conduct a road test
•

On return conduct a visual check to confirm if the leak is evident or not

•

Should the leak not be evident, no further action is required

TIP: In the event there are no visible coolant leaks from the mechanical coolant pump and the coolant level is to specification as per Rep.Gr 10 DO NOT replace the mechanical coolant pump (No further action is required)
However
•

If a visible coolant leak is evident the operative should continue with the remaining instructions from Step 4

4) Check to confirm the part number of the mechanical coolant pump
NOTE: If 07P 121 008B is fitted - Conduct Steps 5 and 6
Or
If 07P 121 008C is fitted the operative should conduct Steps 7 and 8
07P 121 008B coolant pump
5) Replace the following:
•

Mechanical coolant pump - Rep.Gr 19

•

Solenoid for coolant circuit N492 assembly - Rep.Gr 19 - Use a Mityvac or similar vacuum tool to check and confirm there are no vacuum
related issues/leaks present within the system once N492 has been replaced

Ensure all procedures within the Repair manual are followed including any alignments/calibrations which are required (Dependi ng
on vehicle specification)
•

In the event that 07P 121 008B was originally fitted and replaced with 07P 121 008C a non technical DISS query is required

IMPORTANT: Ensure the vacuum hoses are free from moisture DO NOT use compressed air to attempt to remove moisture from the vacuum
hoses (allow the moisture to naturally evaporate from the vacuum lines) as damage to other components and unintentional disconnection of
vacuum hoses can occur if compressed air is used
6) Conduct a road test to confirm the issue is no longer evident

INTERNAL

07P 121 008C coolant pump
7) Referring back to Figure 1 - Disconnect each vacuum hose with care from the Solenoid for coolant circuit N492 - visually monitor for any
traces of coolant
HINT: Refer to the video on the Bentley Hub referencing TPI 2061369/- to check for any signs of coolant within the vacuum hoses
VERY IMPORTANT: If traces of coolant are evident during disconnection, take clear photos or record a clear video of any coolant within the
vacuum hoses or N492 and attach to a new or existing technical DISS query
Please note the quoted video should be used for reference purposes only as it may not show the same part which is fitted to the applicable
vehicles (although the symptom is the same regardless of the type shown)
•

Use a Mityvac or similar vacuum tool to check and confirm there are no vacuum related issues/leaks present within the system to check and
confirm if N492 is sticking open and supplying a constant vacuum

•

The operative must raise a technical DISS query or respond via an already open DISS query to request permission to replace the
mechanical coolant pump ensuring the following is attached to the DISS query:

•

Clear photo of the coolant level

•

Clear photo of the original mechanical coolant pump part number 07P 121 008C (Figure 4)

•

Video of the coolant leak whilst carrying out the pressure test

•

Current ODIS log

NOTE: The photo shown in Figure 4 is a C level coolant pump (shown removed from the vehicle for photographic purposes) a borescope may
have to be used for photos of the coolant pump when fitted

Figure 4

INTERNAL

•

Once permission has been given via the technical DISS query, replace the following

•

Mechanical coolant pump - Rep.Gr 19

•

Solenoid for coolant circuit N492 assembly - Rep.Gr 19

IMPORTANT: Ensure the vacuum hoses are free from moisture DO NOT use compressed air to attempt to remove moisture from the vacuum
hoses (allow the moisture to naturally evaporate from the vacuum lines) as damage to other components and unintentional disconnection of
vacuum hoses can occur if compressed air is used
Ensure all procedures within the Repair manual are followed including any alignments/calibrations which are required (Dependi ng
on vehicle specification)
NOTE: Do not discard the mechanical coolant pump (07P 121 008C or N492) as they may be requested for analysis
8) Conduct a road test to confirm the issue is no longer evident

Warranty accounting instructions
Warranty Type
Damage Service Number
Damage Code
Coolant pressure test
Labour Operation Code
Time
Road test
Labour Operation Code
Time

110 or 910
19 50
00 50
19 01 01 00
10 TU
01 21 00 00
50 TU

Bentayga
Time to replace the mechanical coolant pump and N492 assembly
Labour Operation Code 19 50 19 51 (Use 99 index until 16/02/23)
Time
70 TU
Time to remove and refit the front end module
Labour Operation Code 50 38 19 00
Time
760 TU

New Continental GT/C
Time to replace the mechanical coolant pump and N942 assembly
Labour Operation Code 19 50 19 01 (Use 99 index until 16/02/23)
Time
250 TU

New Flying Spur
Time to replace the mechanical coolant pump and N942 assembly
Labour Operation Code 19 50 19 00 (Use 99 index until 16/02/23)
Time
210 TU

Parts information
Refer to the ETKA parts catalogue

INTERNAL