Cooper (R50) L4-1.6L (W10) (2002)
Fluid Pump: All Technical Service Bulletins
A/T, CVT Transmission - Howling Noise
SI M 24 02 06
Automatic Transmission
January 2007
Technical Service
This Service Information bulletin supersedes S.I. M24 02 06 dated May 2006.
[NEW] designates changes to this revision
SUBJECT
CVT - Howling Noise from the Transmission
MODEL
R50 W10 with CVT up to 05/2005
SITUATION
The customer may complain about a howling type of noise coming from the CVT transmission, when the gear selector is placed in D, M, or S position
and the vehicle speed exceeds 5 mph.
The noise description may vary from "rattling" to "howling", depending on the degree of main bearing wear. The frequency of the noise increases with
the engine speed.
This noise is not present with the gear selector in N or P position and the vehicle at a standstill, with engine running at idle.
CAUSE
Excessive wear of the main ball bearing in the CVT transmission.
CORRECTION
On a customer complaint basis only, replace the main CVT ball bearing together with the flange bolts, cover & oil pump O-rings and the plate spring.
For replacement instructions and tightening torques, refer to the [NEW] updated procedure below.
The special tools required to perform this repair: "M35 Socket" - P/N 83 30 0 494 914; "Bearing extractor kit" P/N 83 30 0 494 915; and "Bearing
driver" P/N 83 30 0 494 916 were shipped to all MINI dealers via the Automatic Tool Shipment Program (refer to SI M04 01 06).
[NEW] PROCEDURE
1.
Remove front left wheel.
2.
Remove left side wheel arch cover.
3.
Remove thee bolts with clips securing the primary oil pump cover. Remove the primary cover.
4.
Remove 4 M6x8 bolts (1) securing engine pitot chamber to oil pump drive.
Note on installation: