Hello !
Si si ! c'est vrai et connu ! Il y a même un pétition qui circule !
Et hop :
post632463.html?hilit=n47%20casse#p632463Il y a même un note PUMA interne chez BMW qui décrit les différents cas :
Diligence-number Item
43863106-03 N47, N47S, N47T, rustling sound in the engine, timing chain rubs.
Approval date (day.month.year) Status Organization
14.12.11 Approved Germany, automobiles
Vehicles affected
E Series Motor Body
E60 E61 E81 E82 E83 N47 N47DK0 N47S N47T
E84 E87 E88 E90 E91
E92 E93 F10 F11 F25
Feedback Comment production interval Feedback
(From / to) on the production interval diligence (day.month.year) to (day.month.year)
/ 01.03.11
Complain
Sound of friction drag on the engine from about 1500 rpm, which is visible from the inside.
The noise can be perceived in area of the gearbox housing and the oil pan.
Cause
Excessively sharp edges on the sprockets, the chain does not flow evenly over the guides.
Measures
We must distinguish two cases:
Case 1:
For engines N47, N47DK0, N47S, production interval from 01.03.2007 to 05.01.2009.
In case of customer complain change the following parts:
(See Annexes, Figures 1 to 7.) - 11 21 7 803 479 exchange crankshaft with bearing cups
Caution: Use only crankshafts with a production date after 5. 1. 2009!
The production date is printed on crankshaft sprocket (see page 2 of the Annex)
Meaning of the figures:
The first two indicate the assembly line.
The 6 following year (two digits), month, day.
Last 5 indicate the reference number of the crankshaft.
Thus, the crankshaft shown on page 2 of the annex was built on October 21, 2009.
-11 41 7 797 896 chain oil pump.
-11 31 8 506 652 Timing Chain bottom.
-13 52 7 797 906 sprocket for driving the high pressure pump.
-11 27 7 800 523 sprocket (intermediate for balance shafts).
-11 31 8 510 014 Supply Chain superior.
-11 31 7 797 899 Timing Chain Guide above.
-13 52 7 797 904 Timing Chain Guide below.
Note: Adjusting the intermediate gear shafts accurately balanced according to workshop manual. In case this intermediate sprocket and the balance shafts are not sufficiently fit, the motor can still giving rise to noise despite the new crankshaft.
See workshop manual 11 21 500 "crankshaft replacement."
Note: In the case of vehicles to which a previous repair and they replaced the crankshaft:
Proceed with these vehicles as detailed in "Case 2".
Case 2:
N47 engine, N47DK0, N47S, N47T production interval 05.01.2009 - 01.03.2011
In case of customer complain replace the following parts:
(See Appendix, Art 8 to 10)
-11 31 8 506 652 Supply Chain bottom.
-13 52 7 797 906 sprocket high pressure pump.
-11 31 8 510 014 Supply Chain superior.
-11 31 7 797 899 Timing Chain Guide above.
-13 52 7 797 904 Timing Chain Guide below.
Note: There is no need to release the binding thread of the intermediate toothed wheel balance shafts.
Note: Since March 2011 there are new guidelines. These guidelines do not bring reinforcing ribs.
(See Appendix, pp. 7 and 10.)
In this way the inner surface of the guides is smooth throughout its length and the timing chain runs easily on them.
They have not changed the references.
Note: During the repair make sure guides are mounted without lateral veins (in the Annex, Art 7 and 10.)
Attention:
No repairs are allowed in vehicles with production date after 03/2011 and vehicles in which all existing measures have already been made. The sound now is the moment, the normal state of this world! No risk of broken chain!
Not allowed engine change because of this claim!
Claim
Location of the defect: Defect Type: Circumstances of default:
Guide part incorrect
Crank Noise
Wheel motor
Distribution
Worn crankshaft
Wheel motor
Distribution
Motor Noise Motor Power
Franck
