Honda Bmw 5 Service Manual
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- Camshaft Timing chain]
< Slide splined shaft onto exhaust camshaft, aligning larger
tooth with corresponding gap of splined sleeve (arrows).
Slide splined shaft in further until
3 small or elongated slots
in splined sleeve are centered to
3 threaded holes in
sprocket.
4 Place intake and exhaust sprocltets in BMW special tool 11 6
180. Position spline gap on intalte sprocket (arrow) as shown
and place secondary chain on sprocltets.
< Carefully remove chain and sprockets from...](http://img.usermanuals.tech/thumb/34/100712/w64_bmw-5-service-manual-1509562501_d-296.png "Page 297
- Camshaft Timing chain]
< Slide splined shaft onto exhaust camshaft, aligning larger
tooth with corresponding gap of splined sleeve (arrows).
Slide splined shaft in further until
3 small or elongated slots
in splined sleeve are centered to
3 threaded holes in
sprocket.
4 Place intake and exhaust sprocltets in BMW special tool 11 6
180. Position spline gap on intalte sprocket (arrow) as shown
and place secondary chain on sprocltets.
< Carefully remove chain and sprockets from...")
Cp-- Camshaft -- Timing Chain Secure camshaft sprockets and impulse wheels: Tighten mounting screws (A) on exhaust camshaft impulse wheel to approx. 5 Nm (44 in-lb). Tighten mounting nuts (6) on exhaust and intake sprocket assemblies to approx. 5 Nm (44 in-lb). Torque down mounting screws (A) and nuts (6) to iinal specifications. Tightening torques Sprocket assembly to camshaft initial torque 5 Nrn (44 in-lb) Sprocket assembly to camshaft M7 Torx screw (A) 20 Nm (I5 it-lb) M6 mounting nut (8) 10 Nm (89 in-lb) - Remove flywheel locking tool from transmission bellhousing so that crankshaft is no longer secured. - Remove camshaft loclting tools from rear of camshafts. 4 Crank engine over by hand twice in direction of rotation until cylinder 1 intake and exhaust camshaft lobes (arrows) face each other. - Secure crankshaft in TDC position with BMW special tool 11 2 300. 4 Place BMW special tool 11 3 240 over camshaft ends and measure clearance of tool to cylinder head surface. NOTE- * If the exhaust side of the tool is not flush with the head (gap A), retime the camshafts as described laler in this repair group. Due to flexible sprocket design and VANOS control unit tol- erances and play, the intake side of special tool 71 3 240 may be up to I mm (0.04 in) above the suriace of the cyl- inder head (gap B). This is normal. Otherwise, retime the camshafts as described in VANOS timing, checking and adjusting (M52 TU and 11154 engines). - Remove VANOS setup bracket from front of cylinder head - Install VANOS control unit. See VANOS control unit, in- stalling (01152 TU and M54 engines). - Install intake camshaft oil baffle
11 7-66 I Camshaft 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 1209 8 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 cool- ant drains. Install new engine oil filter and oil. See 119 Lubrication System. Refill and bleed cooling system as described in 170 Radi- ator and Cooling system. Use scan tool to check VANOS operation with engine idling. Tightening torques Coolant drain plug to cylinder block 25 Nm (18 ft-lb) Radiator cooling fan (viscous clutch) to coolant pump 40 Nm (30 ft-lb) Radiator drain screw to radrator 2.5 Nm (22 in-lb) Vibration damper hub to crankshaft 41 0 Nm (300 ft-ib) TIMING CHAIN (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 re- moval 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 the job. If the camshafts are notproperly timed, the pistons can contact the valves.
Camshaft Timing chain1 - Disconnect negative cable (-) from battery. CAUTION- Prior to disconnecting the battery, read the battery discon- nection cautions given 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 tempera- ture 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.
1 17-68 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 injec- tor (arrow). Repeat for all injectors. Lift off wiring ducts. 4 Remove Fasteners (arrow) from lefl and right cylinder head cover fasteners and remove covers.
- Camshaft Timing chain1 4 Remove oil lines from camshaft supports (arrows). - Remove radiator cooling fan and fan shroud. See 170 Radi- ator and Cooling System. NOTE- The radiator cooling fan nut (32 mm wrench) has left-hand threads. - Remove engine drive belts alternator and AlC compressor. See 020 Maintenance. 4 Remove vibration damper bolts (arrows) and remove damper. 4 Mount BMW special tool 11 2 450 to crankshaft hub while aligning damper locator pin with hole (arrow) in special tool. CAUTION- Crankshaft center bolt is torqued to 410 Nm (300 ft-lb) use BMWspecial tool I I 2 450 to secure crankshaft when remov- ing center bolt. - Loosen and remove cranltshaff center bolt.
I Camshaft Timins Chain 4 Using special tool 11 2 450, rotate engine clocltwise to TDC with number one cylinder cam lobes facing each other (ar- rows) 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). CAUTIOG Tensioner is under spring tension. Release slowly. 1 Release fasteners (arrows) and remove cover
Camshaft Timing chain1 < Remove Automatic Stability Control (ASC) throttle body: Disconnect electrical harness from throttle position sensor. Disconnect ASC actuator cable (arrow). Remove 3 mounting fasteners and remove throttle body. 4 Disconnect fuel tank vent valve line and cap off line (arrow). - Drain engine coolant and remove hoses from thermostat housing. See 170 Radiator and Cooling System. - Remove water pump and thermostat housing. See 170 Ra- diator and Cooling System. - Remove left side upper timing chain cover retaining bolts and remove cover. 4 Counter hold right intake camshaft CAUTION- Counter hold camshaft with a 27mm open-end wrench while loosening sprocket bolts. Grind wrench if necessary to pre- vent damage to head.
1 17-72 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: Use BMW special tool set 11 2 440. - If necessary, turn camshaft so that special tools are squarely seated on cylinder head. Working at left cylinder head loosen intake camshaft sprocket bolts (arrows). CAUTION- Counter hold camshaft with a 27mm open-end wrench while loosening sprocket bolts. Grind wrench if necessary to pre- vent damage to head. Remove BMW special tool 11 2 300 from crankshaft locking tool bore.
1 Camshaft Timing Chain 4 Secure right side timing chain and guide rails together with a plastic wire ties (arrow). 4 Remove lower timing chain cover bolts (arrows) and cover. - Remove wire ties supporting guide rails. - Q Remove sprocket from intake camshafts and remove timing chain. If necessary, remove tensioning rail (A), reversing rail (B), and guide rail (C) to remove timing chain.
I Camshaft Timina Chain / Cylinders 5-8 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 lock- ing tools as shown earlier. 4 lnspect timing chain sprocltets and chain. Inspect guide rail and tensioner rail (arrows) for grooves caused by chain con- tact. Replace any part that is worn or damaged. NOTE- If any sprocl(ets are being replaced due 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 119 Lubrication 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 sprock- et mounting slots. Install two mounting bolts finger tight.