11 31 090 Installing and removing/replacing piston for chain tensioner (M62)

Remove upper section of suction filter housing style with mass air flow sensor.

Remove lower section of suction filter housing.

Fig 1: Removing Upper And Lower Section Of Suction Filter Housing

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Unfasten screw connection.

Fig 2: Unfastening Screw Connection For Chain Tensioner Piston

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Installation: 

Replace sealing ring.

For tightening torque,

refer to 11 31 7AZ in ENGINE - TIGHTENING TORQUES - X5 4.6L .

Remove screw connection and piston for chain tensioner.

Fig 3: Removing Chain Tensioner Piston

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Fig 4: Identifying Components Arrangement

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Tapered end of recoil spring (4) faces hydraulic piston (5).

Installation: 

To simplify assembly, drain oil chamber between sleeve and hydraulic piston.

Fig 5: Draining Oil From Piston

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