11 31 090 Removing and installing/replacing chain tensioner piston (PHEV)

WARNING: High-voltage system - danger to life
l Observe SAFETY INFORMATION for handling electric vehicles.

Necessary preliminary tasks:

Remove clean air pipe. See REMOVING LOWERING CLEAN AIR PIPE and REMOVING TOP CLEAN AIR PIPE .
Remove ENGINE VENTILATION LINE .

Removal:

Release screws (1).

Fig 1: Identifying Screws

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Raise electrical controller drive slightly.

Release chain tensioner (1).

IMPORTANT: Have a cleaning cloth ready. A small quantity of engine oil will escape after the screw connection has been released.
Make sure no engine oil runs onto belt drive.

Fig 2: Identifying Chain Tensioner

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Installation:

Installation note:

Replace sealing ring.

If the chain tensioner is reused, its oil chamber must be drained.

Place chain tensioner on a level support and slowly compress.

Repeat process twice.

Fig 3: Compressing Chain Tensioner

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Position and tighten chain tensioner (1).

Tightening torque 11 31 7AZ .

Fig 4: Identifying Chain Tensioner

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Position electrical controller drive.

Tighten down screws (1).

Tightening torque: 11 65 4AZ .

Fig 5: Identifying Screws

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