11 31 051 Replacing Timing Chain (N54)

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

For the following special tools, refer to MAINTENANCE AND GENERAL INFORMATION - SPECIAL TOOLS .

00 9 140

For the following special tools, refer to ENGINE- SPECIAL TOOLS .

11 0 300
11 4 280
11 8 180
11 8 660
11 9 260

Necessary preliminary tasks:

Remove fan cowl . See 17 11 035 REMOVING AND INSTALLING/REPLACING FAN COWL WITH ELECTRIC FAN (N54) .
Remove cylinder head cover . See 11 12 000 REMOVING AND INSTALLING/SEALING CYLINDER HEAD COVER (N54) .
Remove all spark plugs.
Remove chain tensioner . See 11 31 090 INSTALLING AND REMOVING/REPLACING CHAIN TENSIONER PISTON (N54) .
Remove crankshaft radial seal at front. See 11 14 005 REPLACING FRONT CRANKSHAFT RADIAL SEAL (N54) .
Remove belt tensioner . See 11 28 020 REPLACE ALTERNATOR DRIVE BELT TENSIONER (N54) .
Remove vibration damper . See 11 23 010 REMOVING AND INSTALLING/REPLACING VIBRATION DAMPER (N54) .
Remove inlet and exhaust adjustment units . See 11 36 046 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS (N54) .

Remove fastener (1) in direction of arrow.

Installation:

Install fastener (1) with bore facing outwards.

Fig 1: Removing Fastener

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Secure engine in firing TDC position of cylinder no. 1 with special tool 11 0 300.

Fig 2: Securing Engine In Firing TDC Position Of Cylinder No. 1 Using Special Tool 11 0 300

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Mark flywheel and transmission housing with a line (1).

NOTE: Picture shows automatic transmission.

Fig 3: Identifying Line On Flywheel And Transmission Housing

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Do not remove special tool 11 4 280.

Fig 4: Identifying Special Tool 11 4 280

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Procedure, transmission removed .

Secure flywheel (crankshaft) with special tool 11 9 260.

Fig 5: Securing Flywheel (Crankshaft) Using Special Tool 11 9 260

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Secure flywheel (crankshaft) with special tool 11 8 660 to transmission.

Fig 6: Securing Flywheel (Crankshaft) Using Special Tool 11 8 660

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Mount special tool 11 8 180 on manual transmission with bolts (1).

Secure flywheel in direction of arrow.

Fig 7: Securing Flywheel

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IMPORTANT: To release central bolt (1), remove special tool 11 0 300.

Release central bolt with a 3/4" socket (1) and if necessary with a 3/4" extension (2).

Tightening torque. See 11 21 1AZ in 11 21 CRANKSHAFT AND BEARINGS or 11 21 CRANKSHAFT AND BEARINGS .

Remove central bolt with hub towards front.

Fig 8: Releasing Central Bolt Using 3/4" Socket

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Open plug (1).

Tightening torque. See 11 31 6AZ in 11 31 CAMSHAFT .

Fig 9: Identifying Plug

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Open plug (1).

Tightening torque. See 11 31 6AZ in 11 31 CAMSHAFT .

Fig 10: Identifying Plug

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Release screw (1) on chain drive at top.

Tightening torque. See 11 31 2AZ in 11 31 CAMSHAFT .

Fig 11: Identifying Screw On Chain Drive Top

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Release screw (1) on chain drive at bottom.

Tightening torque. See 11 31 3AZ in 11 31 CAMSHAFT .

Fig 12: Identifying Screw On Chain Drive Bottom

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Release screws (1).

Tightening torque. See 11 31 2AZ 11 31 CAMSHAFT .

Remove timing chain module with timing chain and sprocket wheel upwards in direction of arrow.

Fig 13: Removing Timing Chain Module With Timing Chain And Sprocket Wheel

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IMPORTANT: Note installation direction of sprocket wheel (2).
Collar (see arrow) on sprocket wheel (2) points to crankshaft .
Incorrect assembly will result in engine damage .

Fig 14: Position Of Installing Sprocket Wheel

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Pull timing chain (1) upwards until sprocket wheel (2) engages chain guide (3).

Install timing chain (1) and sprocket wheel (2) in this position.

Installation:

Always hold timing chain under tension.

Timing chain (1) may jam on chain module (3).

Fig 15: Identifying Timing Chain And Chain Module

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IMPORTANT: The N54 engine requires special friction plates between the friction surfaces.
The engine will incur damage if the friction plates are damaged or are not fitted.
Friction plates (1 and 2) are clipped into place on sprocket wheel/oil pump module.

Fig 16: Identifying Friction Plates

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Make sure friction plate (3) is in correct installation position.

Fig 17: Identifying Friction Plate Installation Position

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Push on friction plate (1) without retainers.

IMPORTANT: The N54 engine requires special friction plates between the friction surfaces.
The engine will incur damage if the friction plates are damaged or are not fitted.

Fig 18: Identifying Friction Plate Without Retainers