The Service Measure covers:
'N47, N47S, N47T, slipping noises in the engine, timing chain scraping'

From:
'01/03/07 - 01/03/11'

Cause:
'Sharp edges on the chain wheels or the timing chain does not run evenly over the sliding rails'

There are two distinct methods of dealing with the problem depending on build date.

N47, N47DK0, N47S, production period 01.03.2007 to 05.01.2009:
Renew:
- 11 21 7 803 479 Exchange crankshaft with bearing shells [Crank must be manufactured after 05/01/2009] >> this suggests that all cranks prior to that build have questionable sprockets??
- 11 41 7 797 896 Chain for the oil pump drive.
- 11 31 8 506 652 Bottom timing chain.
- 13 52 7 797 906 Sprocket for the high pressure pump drive.
- 11 27 7 800 523 Gearwheel (idler gear for the balancing shafts).
- 11 31 8 510 014 Top timing chain.
- 11 31 7 797 899 Sliding rail/guide rail for the top timing chain.
- 13 52 7 797 904 Sliding rail/guide rail for the bottom timing chain.

N47, N47DK0, N47S, N47T, production period 05.01.2009 - 01.03.2011:
Renew:
- 11 31 8 506 652 bottom timing chain.
- 13 52 7 797 906 Sprocket for the high pressure pump drive.
- 11 31 8 510 014 Top timing chain.
- 11 31 7 797 899 Sliding rail/guide rail for the top timing chain.
- 13 52 7 797 904 Sliding rail/guide rail for the bottom timing chain.

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Now dealing with part numbers changing or not changing; a simple quote:
'Note: New sliding rails are available from March 2011.
These sliding rails no longer have any strengthening bars.
The contact face on the sliding rails is therefore thoroughly even.
The timing chain runs quietly over the sliding rails.
The part numbers have not changed.'

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The lower chain changed numbers on 21/07/2009
The top chain changed numbers twice on 23/03/2009 and 08/12/2009
Cam Sprocket changed numbers on 13/01/2011
And for good measure the turbo on these is now on the 5th number since new.

Number changes are no guarantee of a change in the part, in the same way that no change is a guarantee that the part has not changed.

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The above is for the symptoms of a noisy chain/engine. When a chain breaks it's a totally different ballgame...

salat napísal:

Co som ale nepochopil je tato veta: "And for good measure the turbo on these is now on the 5th number since new." o akom piatom cisle/mieste to pise, je to niekde v oznaceni motora, alebo kde? Neviete?