2050334.3

Technical product information
Topic
Market area
Brand
Transaction No.
Level
Status
Release date
Ticking noise from engine bay
Bentley: worldwide (2WBE),Hongkong-Macau (5HK)
Bentley
2050334/3
EH
Draft
New customer code
Object of complaint
Complaint type Position
engine -> induction system, charging systems, vacuum systems noise, vibration
New workshop code
Object of complaint
Complaint type
engine -> induction system, charging systems, vacuum systems -> central feed vacuum pump
noise, vibration -> noise
Vehicle data
W12 TSI engine vehicles
Sales types
Type
3S3*
4V14A9
4V14A9
4V14A9
4V14A9
4V14A9
4V14A9
MY
2018
2017
2017
2017
2018
2018
2018
Brand
E
E
E
E
E
E
E
Documents
Document name
master.xml
Designation
SUV BY636 447/W128AG
SUV BY636 447/W128AG
SUV BY636 447/W128AG
SUV BY636 447/W128AG
SUV BY636 447/W128AG
SUV BY636 447/W128AG
Engine code Gearbox code
*
*
DDBB
RGQ
DDBB
SHT
DDBB
QTZ
DDBB
SHT
DDBB
QTZ
DDBB
RGQ
Final drive code
*
QUS
QUS
QUS
QUS
QUS
QUS
Position
Technical product information
Ticking noise from engine bay
Transaction No.: 2050334/3
Customer statement / workshop findings
Ticking noise emanating from rear of Bank 1 cylinder head
Technical background
Noise from failed vacuum pump
Production change
N/A
Measure
A specific vacuum pump failure is known to create a ticking noise.
This ticking noise, on initial inspection, is easily misinterpreted as a fault in the valve train or fuel injector, when in reality it is more likely to be produced
by a defective vacuum pump. Therefore always ensure that this type of noise is identified precisely using a stethoscope. Specifically use the
stethoscope to check the vacuum pump located at the rear of Bank 1 cylinder head, when this is found to be the origin of the noise then change the
vacuum pump and retest.
Note: Typically no Diagnostic Trouble Codes (DTCs) or other symptoms are experienced by the customer with this failure