Cooper S (R56) L4-1.6L Turbo (N14) (2009)
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8. Install the locating pin (Special Tool 11 9 590) to lock the position of the engine.
9. Remove the chain tensioner and collect the residual oil with a shop towel.
10. Fit the chain tensioner (Special Tool 11 9 340) without the seal ring and with the lock nut loose. Pretension the chain tensioner with Special Tool 00
9 250 to 0.6 Nm. Finger-tighten the lock nut on Special Tool 11 9 340.
11. Remove the chain tensioner (Special Tool 11 9 340) from the engine, with the lock nut still tight. Measure the distance (A), as described in the
illustration.
12. If distance (A) is less than 68mm (and the noise can be reproduced only between 1,600-1,800 rpm), then only replace the chain tensioner with P/N 11
31 7 607 551 (refer to parts list A), as per Repair Instruction REP 11 31 090 (Installing and removing/replacing chain tensioner piston N14).
13. If distance (A) is 68mm or greater (and the noise is reproducible both at 1,600-1,800 rpm range as well as at idle speed when cold), replace the
following components in the list below (refer to parts list B). If you are uncertain regarding repair attempts already made, each chain tensioner part
number is stamped on the outer sleeve. It must be removed from the engine in order to read the part number.
^ Chain tensioner P/N 11 31 7 597 895 only!
Note:
P/N 11 31 7 607 551, Timing chain tensioner, should not be installed with a new timing chain.
^ Timing chain
^ Guide rail
^ Tensioner rail
^ Sliding rail
