BMW X5 Owners & Service Manuals

BMW X5: Replacing Timing Chain (N52K)

Special tools required:

Necessary preliminary tasks:

Remove fastener (1) in direction of arrow.

Installation:

Install fastener (1) with bore facing outwards.

Camshaft
Fig. 181: Fastener

Rotate crankshaft at central bolt into TDC position.

Slide special tool 11 0 300 in direction of arrow into special tool bore and secure crankshaft.

IMPORTANT: On vehicles with optional extra SA205 (automatic transmission), there is a large bore for the TDC position shortly before the special tool bore. This bore can be confused with the special tool bore.

If the flywheel is secured in the correct special tool bore with special tool 11 0 300 , the engine can no longer be moved at the central bolt.

Camshaft
Fig. 182: Securing Crankshaft Using Special Tool (11 0 300)

IMPORTANT: Do not remove special tool 11 0 300 to release central bolt (1).

Employ a second person for gripping when releasing central bolt (1).

Screw special tool 11 9 280 onto hub of vibration damper.

Release central bolt (1).

Tightening torque: 11 21 1AZ.

Remove hub towards front.

Camshaft
Fig. 183: Central Bolt With Special Tool (11 9 280)

Open plug (1).

Tightening torque: 11 31 7AZ.

Camshaft
Fig. 184: Plug

Open plug (1).

Tightening torque: 11 11 7AZ.

Installation:

Replace aluminium screws.

Camshaft
Fig. 185: Plug

Release bearing pin (1) from timing chain module on cylinder head.

Tightening torque: 11 31 5AZ.

Camshaft
Fig. 186: Bearing Pin

Release bearing pin (1) from timing chain module on crankcase.

Tightening torque: 11 31 4AZ.

Camshaft
Fig. 187: Bearing Pin

IMPORTANT: Install special tool 11 4 280 to release the central bolts on the inlet and exhaust adjustment units.

Secure special tool 11 4 283 to cylinder head with bolts (1).

NOTE: Fit special tool 11 4 282 underneath on side of inlet camshaft.

Mount special tool 11 4 281 on inlet and exhaust camshafts.

Do not remove special tool 11 4 280.

Camshaft
Fig. 188: Cylinder Head Bolts And Special Tools (11 4 282) And (11 4 281)

Remove inlet and exhaust adjustment unit.

Release bolts (1) from timing chain module on cylinder head.

Tightening torque: 11 31 3AZ.

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

Camshaft
Fig. 189: Removing Timing Chain Module Bolts

IMPORTANT: Note installation direction of sprocket wheel (2).

Collar (see arrow) on sprocket wheel (2) points to engine.

Incorrect assembly will result in engine damage.

Camshaft
Fig. 190: Collar On Sprocket Wheel

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 (1) under tension. Timing chain (1) may jam on chain guide (3).

Camshaft
Fig. 191: Timing Chain, Sprocket Wheel And Chain Guide

Install hub with central bolt.

Tighten down special tool 11 5 200 with screws (1) to hub.

Camshaft
Fig. 192: Screws With Special Tool (11 5 200)

Remove tensioner for drive belt.

Screw in special tool 11 4 362 from special tool kit 11 4 360.

Mount special tool 11 9 280 on 11 5 200.

Support special tool 11 9 280 on special tool 11 4 362.

Special tool 11 0 300 secures crankshaft.

Tighten central bolt to jointing torque.

Tightening torque: 11 21 1AZ.

Mark central bolt and hub with paint.

Camshaft
Fig. 193: Special Tools (11 9 280), (11 0 300), (11 4 360) And (11 5 200)

Mark special tools with colored line (1).

See picture.

IMPORTANT: Do not remove the special tool while tightening the central bolt to torsion angle.

Risk of damage!

If necessary, tighten central bolt to torsion angle with special tool 00 9 140.

Tightening torque: 11 21 1AZ.

Camshaft
Fig. 194: Marking Special Tools With Colored Line

Tighten central bolt with a second person helping.

Tightening torque: 11 21 1AZ.

Install inlet and exhaust adjustment units.

Install chain tensioner.

Camshaft
Fig. 195: Special Tools (11 9 280), (11 0 300), (11 4 360) And (11 5 200)

Crank engine twice.

Check timing, see 11 31 005 Checking timing of camshaft(s) (N52K).

If necessary, adjust valve timing.

Assemble engine.

INSTALLING AND REMOVING/REPLACING CHAIN TENSIONER PISTON (N52K)

Release chain tensioner (1).

Tightening torque: 11 31 6AZ.

IMPORTANT: Have a cleaning cloth ready. A small quantity of engine oil will emerge after the screw connection has been released.

Make sure no engine oil runs onto belt drive.

Installation:

No sealing ring is fitted during series-production assembly.

A sealing ring must be fitted by service personnel when the chain tensioner is fitted.

Camshaft
Fig. 196: Chain Tensioner

If the chain tensioner is reused, its oil chamber must be drained. Place chain tensioner on a level working surface and slowly compress.

Repeat procedure twice.

Camshaft
Fig. 197: Compressing Chain Tensioner On A Level Working Surface

Assemble engine.

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