2049586/6
Service Bulletin Details
Public Details for: 2049586/6
Misfiring, w12 tsi - excessive carbon build up cylinder leakage. Customer statement/workshop findings: customer statement: emission control warning signal displayed, engine misfire workshop findings: event entries in engine control unit
- 2021 - 2020 - 2019 - 2018 - 2017 -
Models from 2021
2021 BENTLEY BENTAYGA |
Models from 2018
2018 BENTLEY BENTAYGA |
2018 BENTLEY CONTINENTAL GT |
Models from 2017
2017 BENTLEY BENTAYGA |
Technical product information Topic Market area Brand Transaction No. Level Status Release date Misfiring, W12 TSI - Excessive carbon build up cylinder leakage Bentley: worldwide (2WBE) Bentley 2049586/6 EH Released for publishing 03-Jul-2020 New customer code Object of complaint Complaint type information, navigation, communication, entertainment -> symbolic fault indicators -> emission control fault indicator engine -> engine operation -> power development -> engine power functionality -> activates functionality -> uneven Vehicle data W12 Bentayga - New Continental GT - New Continental GTC Sales types Type MY Brand Designation Engine code Gearbox code Final drive code 3S3* 3S3* 3S3* 3S4* 3S4* 4V14A9 4V14A9 4V14A9 4V14A9 4V14A9 2018 2019 2020 2019 2020 2017 2018 2019 2020 2021 E E E E E E E E E E Documents Document name master.xml * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Position Technical product information Misfiring, W12 TSI - Excessive carbon build up cylinder leakage Transaction No.: 2049586/6 Release date: 03-Jul-2020 Customer statement / workshop findings Customer statement: Emission control warning signal displayed, engine misfire Workshop findings: Event entries in engine control unit relating to cylinder misfires – excessive carbon build up to leading to cylinder leakage and spark plug foul Technical background Deviations in the country-specific fuel specifications can lead to carbon deposits on the injectors. If pronounced these deposits can lead to spark plug fouling, cylinder leakage and fouled injectors all influencing combustion in the cylinder. As a result the above event entries are logged in the engine control unit Production change None Measure 1. Follow the Misfire best practice TPI 2051187 in order to confirm that the root cause of the misfire is excessive cylinder carbonisation leading to excessive cylinder leakage/fouling. 2. Raise a DISS query with your findings, this action is an essential element of the investigation 3. Ensure cylinder compressions are tested and recorded, this action is an essential element of the investigation 4. Ensure cylinder leakage is checked and recorded, this action is an essential element of the investigation 5. From two of the cylinders that have recorded misfires take borescope images of each inlet valve stem 6. Note: The following operations should only be carried out if excessive carbonisation is confirmed 7. Check and if necessary correct all engine and transmission fluid levels 8. Fill fuel tank 9. Add the relevant dose of G17 Fuel additive to the fuel load as specified on the bottle (refer to ETKA) 10. Run the engine at idle for 8 hours – Periodically check to ensure engine coolant temperature is within safe limits – do not allow engine to overheat 11. Repeat operations 3 through 5 and compare results if improvement is noted repair is complete 12. If no or little improvement is recorded then the condition of the spark plugs and low pressure injectors will need to be confirmed and replaced where necessary 13. If this repair procedure is not successful report back via DISS query 14. On successful completion check and if required drain any excess oil from the intercoolers reference TPI 2050222 15. Before returning vehicle to customer top up to fill the fuel tank Warranty accounting instructions To carry out the Injector cleaning process ( points 8- 10) Warranty type 110 or 910 Labour operation code 24 40 29 00 Damage Service Number 24 40 Damage Code 00 10 Time 20 TU Refer to ElsaPro for all other labour operation times Parts information Part number Description Refer to ETKA Additive Quantity As required