BMW 3 Series Service Manual (E39)
.pdf117-66
ICamshaft Timing Chain
4 install cylinder head cover:
Check for correct seating of half-moon seals (A) in back of cylinder head cover.
Use a small amount of Three Bond 12098 or equivalent sealant at corners (B) of half-moon cutouts. Seal corners in front of cylinder head at VANOS control unit.
Tightening torque
Cylinder head cover to cylinder head |
10 Nm (89 in-lb) |
-Remainder of reassembly is reverse of removal, noting the following:
Secure all coolant hoses, thermostat housing, engine coolant drains.
Install new engine oil filter and oil. See 119 Lubrication
System.
Refill and bleed cooling system as described in 170 Radiator and Cooling system.
Use scan tool to check VANOS operation with engine idling.
Tightening torques |
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Coolant drain plug to cylinder block |
25 Nm (18 ft-lb) |
Radiator cooling fan (viscousclutch) |
40 Nm (30 ft-lb) |
to coolant pump |
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Radiator drain screw to radrator |
2.5 Nm (22 in-lb) |
Vibration damper hub to crankshaft |
410 Nm (300ft-ib) |
TIMINGCHAIN
(M62 ENGINE TO 911998)
Timing chains, removing (M62 engine to 911 998)
Camshaft timing chain removal requires that the engine oil pan be removed.
Special BMW service tools are needed for timing chain removal and installation procedures. The special tools assure propertiming of thevaivetrain. Precise marks to set the timing on the camshafts are not provided for reassembly. Read the procedures through before beginning the job.
CAUTION-
Special BMW service tools are needed for this procedure. Read the procedure through before beginning thejob. I f the camshaftsare notproperly timed, the pistons can contact the valves.
Camshaft Timing chain1
-Disconnect negative cable (-) from battery.
CAUTION-
Prior to disconnectingthe battery, readthe batterydisconnection cautionsgiven in 001 General Cautions and Warnings.
4 Removing top and side engine covers:
Press down on locking pins (arrows) to release locks. Lifl intake manifold cover straight up to remove.
Pry out caps from side covers.
Remove fasteners and covers.
NOTE-
Some early models use pry out trim caps and fasteners to hold the top cover in place.
Disconnect electrical harness connectors at ignition coils
(A).
Remove left and right side ignition coil mounting fasteners and coils.
NOTE-
Make note of location of ground strap (arrow).
Remove spark plugs.
-Remove posltlve (+) terminal cable from left cylrnder head cover.
-Unbolt left and right side cable ducts from fuel rail
Remove air filter housing and mass air flow sensor:
Disconnect mass air flow sensor and intake air temperature sensor electrical harnesses (A and B).
Remove air filter housing mounting fastener (arrow)
Loosen intake hose clamp (C) .
Remove air filter housing with mass air sensor and intake duct from throttle body assembly.
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Camshaft Timing Chain
4 Remove left and right side ignition coils and spark plugs:
-Remove positive (+) terminal cable from left cylinder head cover.
-Unbolt lefl and right side cable ducts from fuel rail,
4 Disconnect fuel injector electrical connectors:
Pry corner of wire lock clip to release connector from injector (arrow).
Repeat for all injectors. Lift off wiring ducts.
4 Remove Fasteners (arrow) from lefl and right cylinder head cover fasteners and remove covers.
ICamshaft Timins Chain
4 Using special tool 11 2 450, rotate engine clocltwise to TDC with number one cylinder cam lobes facing each other (arrows) as shown.
4 Lock crankshaft in TDC position with BMW special tool 11 3 200 (arrow).
-Remove BMW special tool 11 2 450 and remove hub.
-Remove upper engine oil pan. See 119 Lubrication.
-Remove alternator. See 121 Battery, Starter, Alternator.
-Remove retaining bolt for oil dipstick tube from upper timing chain cover on right side.
-Remove camshaft position sensor from right upper timing chain cover.
<Remove right upper timing chain cover:
Remove chain tensioner (A).
C A U T I O G |
1 |
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Tensioner is under spring tension. Release slowly. |
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Release fasteners (arrows) and remove cover |
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Camshaft Timing Chain
4 Working at right side cylinder head loosen Intake camshaft sprocket bolts (arrows).
4 Secure left and right side camshafts in TDC position:
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Use BMW special tool set 11 2 440. |
If necessary, turn camshaft so that special tools are |
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squarely seated on cylinder head. |
Working at left cylinder head loosen intake camshaft sprocket bolts (arrows).
CAUTION-
Counterholdcamshaft with a 27mm open-endwrench while looseningsprocket bolts. Grind wrench if necessary to prevent damage to head.
Remove BMW special tool 11 2 300 from crankshaft locking tool bore.
ICamshaft Timina Chain
Timing chains, installing (M62 engine to 911 998)
4 The procedure outlined below assumes that the camshafts are locked in the TDC installation position with special locking tools as shown earlier.
/ Cylinders 5-8
4 lnspect timing chain sprocltets and chain. Inspect guide rail and tensioner rail (arrows)for grooves caused by chain contact. Replace any part that is worn or damaged.
NOTE-
If any sprocl(ets are being replaceddue to wear, the chain should also be replaced. If the crankshaft sprocket requires replacement, the oil pump drive sprocket and chain must be removed. See 119Lubrication System for oilpump removal information.
-If removed, reinstall timing chain tensioning rail, reversing rail, and guide rail.
If tensioning rail was removed, replace O-ring at tensioning rail oil guide.
Tightening torque
Reversing rail to engine block |
14 Nrn (10 n-lb) |
4 lnstall timing chain and intalte sprocket to intake camshaft on left cylinder head. Center bores of camshaft flange in sprocket mounting slots. Install two mounting bolts finger tight.