Honda Bmw 5 Service Manual
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Camshaft Timing chain]
4 Pull out exhaust camshaft splined shaft to stop.
- Make sure camshafts are secured in TDC position using
BMW soecial tools 11 3 240 and 11 3 244.
4 Preload primary chain tensioning rail:
Tighten adjusting screw on
BMW special tool 11 4 220.
Tightening torque
Primary chain tensioner preload
0.7 Nm (6 in-lb)
4 Preload exhaust camshaft spring plate by pressing on im-
pulse wheel. Tighten mounting nuts
(arrows) by hand. Do
not tighten fully.](http://img.usermanuals.tech/thumb/34/100712/w64_bmw-5-service-manual-1509562501_d-282.png "Page 283
Camshaft Timing chain]
4 Pull out exhaust camshaft splined shaft to stop.
- Make sure camshafts are secured in TDC position using
BMW soecial tools 11 3 240 and 11 3 244.
4 Preload primary chain tensioning rail:
Tighten adjusting screw on
BMW special tool 11 4 220.
Tightening torque
Primary chain tensioner preload
0.7 Nm (6 in-lb)
4 Preload exhaust camshaft spring plate by pressing on im-
pulse wheel. Tighten mounting nuts
(arrows) by hand. Do
not tighten fully.")
Camshaft Timing chain1 < With compressed air line connected, turn engine at least twice in direction of rotation until cylinder 1 intake and ex- haust camshaft lobes (arrows) face each other. Do not rotate engine counterclockwise to reach the top dead center position. Instead, complete another two complete ro- Remove sealing plug from bore at bellhousing. Secure crank- shaft in TDC position with BMW special tool 11 2 300 (ar- row). - Remove cylinder head cover studs at rear of cylinder head. < Place BMW special tool 11 3 240 over camshafts ends and measure clearance of tool to cylinder head surface. NOTE- If the exhaust side of the tool (A) is not flush with the head, adjust camshaft timing as described below. Due to flexible sprocket design and VANOS control unit tol- erances and play, the intake side of special tool 11 3 240 (B) may be up to 1 mm (0.04 in) above the surface of the cylinder head. This is normal. Reassemble engine. Other- wise, adjust camshaft timing as described below. - Remove double VANOS control unit. See VANOS control unit, removing (M52 TU and M54 engines). < Press down on secondary chain tensionerand lock into place using BMW special tool 11 3 292 or equivalent pin or drift.
1 17-46 Camshaft Timing Chain 4 Loosen intake camshaft sprocket mounting nuts (arrows) by 1 turn. Loosen exhaust camshaft sprocltet mounting bolts: Release bolts (A) 112 turn Release nuts (B) 2 turns Pull out intake camshaft splined shaft out approx. 1 mm (0.04 in) of splines (arrows) can be seen.
Camshaft Timing chain] 4 Pull out exhaust camshaft splined shaft to stop. - Make sure camshafts are secured in TDC position using BMW soecial tools 11 3 240 and 11 3 244. 4 Preload primary chain tensioning rail: Tighten adjusting screw on BMW special tool 11 4 220. Tightening torque Primary chain tensioner preload 0.7 Nm (6 in-lb) 4 Preload exhaust camshaft spring plate by pressing on im- pulse wheel. Tighten mounting nuts (arrows) by hand. Do not tighten fully.
- I Camshaft Timing Chain - -- Install BMW special tool 11 6 150 (VANOS setup bracket) to front of cylinder head timing case. Tighten nuts (arrows) by hand, and then tighten down uniformly until special tool is in full contact with cylinder head. CAUTION- Male sure all gasket material is removed from face of cylin- der head. Clean sealins face and keep free of oil. Secure camshaft impulse sprockets and wheels: Pretighten Torx screws (A) on exhaust camshaft impulse wheel to approx. 5 Nm (44 in-lb). Pretighten mounting nuts (B) on exhaust and intake sprocket assemblies to approx. 5 Nm (44 in-lb). - Torque down Torx screws (A) and nuts (8) to flnal specifications. Tightening torques Sprocket assembly to camshaft initial torque 5 Nm (44 in-lb) Sprocket assembly to camshaft M7 Torx screw (A) 20 Nm (15 fl-lb) ivl6 mounting nut (B) 10 tdm (89 in-lb) - Remove flywheel locking tool from transmission bellhousing so that crankshaft is no longer locked. - Remove camshaft locking tools from rear of cylinder head. - Crank engine over twice by hand in direction of rotation until cylinder 1 intake and exhaust camshaft lobes face each other - again. - Secure crankshaft 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. NOJE- If the exhaust side of the tool (A) is not flush with the head, camshaft timing Is incorrect. Repeat camshaft timing pro- cedure. * Due to flexible sprocket design and VANOS control unit tol- erances and play, the intake side of special tool 11 3 240 (6) may be up to 1 mm (0.04 in) above the sudace of the cylinder head. This is normal. Otherwise, repeat camshaft timing procedure.
-- - -- - -- Camshaft Timing chain1 - Remove camshaft locking tools from rear of camshafts - Remove BMW special tool 11 4 220 (adjustable primary chain tensioner). Reinstall primary chain tensioner. Tightening torque Primary chain tensioner to cylinder head 70 Nm (52 it-lb) - Remove crankshaft locking tool from transmission bellhous- ing. Reinstall sealing plug. - Remove VANOS setup bracket from front of cylinder head - lnstall VANOS control unit as described earlier in this group. - Remove compressed air fitting (BMW special tool 11 3 450) from VANOS control unit. - Fit VANOS oil line banjo bolt with new seals. Attach oil line to VANOS control unit. Tightening torque Oil line to VANOS control unit (banjo bolt) 32 Nm (24 H-lb) - Remainder of installation is reverse of removal, noting the fol- lowing: lnstall spark plugs. * lnstall intake camshaft plastic baffle prior to installing cylin- der head cover. lnstall ignition coil packs and connect elec- trical harness connectors. Install radiator cooling fan. - lnstall air filter housing and top engine cover. Tightening torque Radiator cooling fan (VISCOUS clutch) to 40 Nm (30 ft-lb) coolant pump Cyitnder head cover to cylinder head 10 Nm (89 in-lb) Sparlc plug to cylinder head 25 Nm (18 ft-lb)
11 7-50 /Camshaft Timing Chain Timing chains assembly (M52 TU and M54 engines) 1. Impulse wheel mounting nut 2. Camshaft impulse wheel (exh.) 3. Spring plate 4. Thrust spacer (T = 3.5 mm) 5. Primary chain tensioner 6. Torx screw 7. Exhaust secondary sprocket 8. Splined shaft 9. Secondary timing chain 10. Splined sleeve 11. Primary sprocket 12. Threaded stud 13. Secondary chain tensioner 14. Sprocket mounting nut 15. Spring plate 16. Splined shaft 17. Intake camshaft sprocket 18. Secondary chain lower guide 19. Thrust spacer 20. Camshaft impulse wheel (intake) 21. Chain tensioner rail 22. Crankshaft sprocket 23. Threaded stud 24. Primary chain 25. Threaded stud 26. Guide rail 27. Threaded stud 28. Woodruff key
... -. Camshaft Timing chain1 Timing chains, removing (M52 TU and M54 engines) Camshaft timing chain removal requires that the oil pan be re- moved. See 119 Lubrication System. Also required is re- moval of the VANOS control unit and disassembly of the intake and exhaust camshaft sprocket assemblies as de- scribed earlier in this repair group. Special BMW service tools are needed for timing chain re- moval and installation. The special tools assure proper timing of the valvetrain. Precise marlts to set the timing on the cam: shafts are not provided for reassembly. Read the procedures through before beginning the job. CA UTION- If the camshafts are not properly timed, the pistons can con- tact the valves. - D~sconnect negative (-) cable from battery. CAUTION- * Disconnecting the battery may erase fault code@) stored in control module memory. Check for fault codes using spe- cial BMW diagnostic equipment. Prior to disconnecting the battery, read the battery dis- connection cautfons given in 001 General Cautions and Warninqs. - Remove VANOS control unit. See VANOS control unit, re- moving (M52 TU and M54 engines). Remove sealing plug from crankcase below starter and se- cure crankshaft with BMW special tool ll 2 300. Drain engine cooling system. See 170 Radiator and Cool- ing System. Remove belt driven cooling fan, fan shroud, and thermostat housing. See 170 Radiator and Cooling System. Remove drive belts. See 020 Maintenance. NOTE- Mark direction of belt rotation if reusing belt. - Remove water pump pulley fasteners and pulley. - Drain engine oil and remove oil pan as described in 119 Lubrication System.
11 7-52 Camshaft Timing Chain Remove primary camshaft chain tensioner (arrow) from tim- ing chain cover. CAUTIOIG Primary camshaft chain tensioning piston is under spring pressure. Press down on secondary chain tensionerand lock into place using BMW special tool 11 3 292 or a similar size wire. Remove exhaust camshaft impulse wheel rows). Remove impulse wheel (A). 4 Remove spring plate (A). mounting nuts (ar-
- Camshaft Timing chain1 < Remove intake camshaft sprocket mounting nuts (arrows) and remove spring plate (labelled FRONT). Remove tom screws from exhaust camshaft sprocket (arrows). Lift off exhaust and intake sprockets with secondary chain, thrust spacer (A) and splined shaft (B). CAUTION- Splined shafts for both intake and exhaust camshafts share the same part numbe,: Remove and mark used splined shafts in order to reinstall in original locations. 4 Remove exhaust camshaft splined sleeve (A) and shaft (8).
1 17-54 Camshaft Timing Chain 4 Remove secondary chain tensioner mounting bolts (ar- rows). Remove tensioner while keeping locking pin in place. 4 Remove primary chain sprocket mounting studs (arrows) on exhaust camshaft. 4 Lift primary chain sprocltet off exhaust camshaft. Remove sprocket from chain.