Cams Camsh haf aftt Tim Timin ing g Cha Chain in
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Camshaft adjustment (VANOS) units, removing and installing (N51, N52, N52KP, N54 engines)
Camshaft adjustment (VANOS) (VANOS) units, removing and installing (N51, N52, N52KP, N54 engines) Special tools and new parts are required to remove and install camshaft adjustment (VANOS) (VANOS) units and to time camshafts. Read the entire procedure before beginning repairs. — NOTE —
If a rattling noise can be heard from from the engine compartment in the 7 1 VANOS area, the engine has reduced power, and VANOS and 1 camshaft sensor faults are stored (SES light on), check the assembly bolts on the VANOS units once the units are removed. The bolts may be loose or broken or have fallen out of the VANOS unit. The VANOS VANOS units are not serviceable. If the bolts are found to be loose, broken or missing, replace the complete VANOS VANOS unit. Locate all missing par ts before reassembling the engine. — WARNING — • To avoid personal injury, be sure the engine is cold before beginning the procedure. CAUTION —
• Disassembly, Disassembly, removal and assembly of camshaft adjustment (VANOS) (VANOS) units without special tools poses the risk of damage or breakage: Valves may be bent by contact with the piston crowns. • Throughout this procedure, unless otherwise specified, crankshaft and camshafts remain locked against rotation using BMW special tools. • Keep VANOS VANOS components free of silicone silicone sealant. A small amount of silicone introduced into VANOS actuator or solenoid can set faults.
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Use scan tool to read out and record ECM fault memory. memory. Switch ignition OFF and remove key.
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Remove upper and lower cabin microfilter housings. See 640 Heating and Air-conditioning Air-conditioning..
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Remove right strut tower brace.
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Remove ignition coil cover (upper engine cover). See 020 Maintenance. Maintenance.
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Remove ignition coils. See 120 Ignition System. System.
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Remove cylinder head cover. See 113 Cylinder Head Removal and Installation. Installation.
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Raise vehicle and support safely. — WARNING — • Make sure the vehicle is stable stable and well supported at all times. Use a professional automotive lift or jack stands. A floor jack is not adequate support.
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Remove engine compartment splash shield. See 020 Maintenance. Maintenance.
117-36
Camshaft Timing Chain
Camshaft adjustment (VANOS) units, removing and installing (N51, N52, N52KP, N54 engines) Non-turbo engine: Using vibration damper bolt, rotate crankshaft to place cylinder 1 in TDC firing position. In this position, cylinder 1 intake camshaft lobe points upward at an angle.
Non-turbo engine: Cylinder 1 in TDC firing position: Cylinder 6 exhaust camshaft lobe (A ( A) points downward at an angle (dashed ( dashed ( B) is not actuated. line). line). Cam follower (B — NOTE — • Use a mirror to check check exhaust camshaft lobe position.
Turbo engine: Using vibration damper bolt to rotate crankshaft, place cylinder 1 in TDC firing position. In this position, lobes for cylinder 6 (rear of engine) intake and exhaust camshafts (A (A, B) point away from each other and down. Cylinder 6 camshaft lobes do not contact roller cam followers. followers. — NOTE — • Use a mirror to check check cylinder 6 cam lobe positions. positions.
Cams Camsh haf aftt Tim Timin ing g Cha Chain in
117 17-3 -37 7
Camshaft adjustment (VANOS) units, removing and installing (N51, N52, N52KP, N54 engines) Working underneath engine, slide out protective plug at lower left of engine bell housing flange. Install BMW special tool 11 0 300 (crankshaft locking tool) through bell housing flange port into flywheel (A (A) hole. If necessary, rock flywheel slightly back and forth to line up holes with tool. This locks crankshaft at TDC. CAUTION —
• Automatic transmission model: There is a larger bore very close to the flywheel TDC bore. Do not confuse the larger bore with the correct TDC bore. BMW special tool should fit snugly. If the flywheel is locked using the correct bore, the engine can no longer be rotated at the vibration damper bolt. • If special tool 11 0 300 does not slide easily easily into the bell housing flange bore, sand paint off the tool. Do not enlarge the bore.
Use BMW special tool set 11 4 280 to lock down camshafts.
Working at right front of cylinder head, remove timing chain tensioner (B (B). Be prepared to catch dripping oil with a shop towel. Do not allow oil to contaminate accessory belt.
7 1 1
117-38
Camshaft Timing Chain
Camshaft adjustment (VANOS) units, removing and installing (N51, N52, N52KP, N54 engines) Working at front of camshafts: • Loosen and remove exhaust exhaust and intake camshaft adjustment adjustment (VANOS) unit mounting bolts (A ( A, B). Discard bolts. • Disengage timing chain from camshaft camshaft adjustment unit sprockets. sprockets. • Tilt adjustment units down to remove. remove.
Installing camshaft adjustment (VANOS) (VANOS) units: • Note that exhaust and intake intake units are different and and so marked. • Camshaft sensor impulse wheel for for intake and exhaust are the same. • Adjustment units units and sensor wheels may may be installed in any any position initially. • Use center center new bolts bolts..
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Place intake adjuster onto intake camshaft and timing chain. Install impulse wheel with new bolt. Snug up center bolt.
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Place exhaust camshaft adjuster onto exhaust camshaft and timing chain. Install impulse wheel with new bolt. Snug up center bolt.
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Loosen both center bolts center by 90° (¼ turn).
Press chain into chain tensioner rail (arrow ( arrow)) by hand to make sure it is routed correctly. (Chain assembly and camshaft adjustment units shown removed from engine for purpose of illustration.)
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Adjust camshaft timing. See Camshaft timing, adjusting (N51, N52, N52KP, N54 engines) in engines) in this repair group. Then torque adjustment unit mounting bolts. Tightening torque Camshaft adjustment (VANOS) unit to camshaft (use new M10 x 94 mm bolt): • Stag Stage e1 • Stag Stage e2
20 Nm (15 ft-lb) additional 180°
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Install chain tensioner. See Camshaft timing, adjusting (N51, N52, N52KP, N54 engines) in engines) in this repair group.
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Reassemble engine.
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Camshaft adjustment (VANOS) units, removing and installing (N51, N52, N52KP, N54 engines) CAUTION —
• If chain tensioner is reused, drain its oil chamber. chamber. Place tensioner on level working surface and compress slowly. slowly. Repeat twice. • No sealing ring is fitted to chain tensioner at the factory factory.. When reassembling engine, be sure to use new sealing O-ring. Tightening torque Timing chain tensioner to cylinder head (M22 x 1.5) (use new sealing O-ring)
55 Nm (41 ft-lb)
CAUTION —
• Remove crankshaft crankshaft locking tool before rotating or starting engine.
7 1 1
established 1950 Automotive Reference™
BentleyPublishers .com
BMW 3 Series (E90, E91, E92, E93) Service Manual: 2006-2011 325i, 325xi, 328i, 328xi 330i, 330xi, 335i, 335is, 335xi Price: $149.95 Bentley Stock No: B311 Publication Date: 2014.june.02 ISBN: 978-0-8376-1723-7 Hardcover, 8 3/8 in. x 11 in. Case quantity: 1 1,424 pages 2,412 technical photos and illustrations
The BMW 3 Series (E90, E91, E92, E93) Service Manual: 2006-2011 contains in-depth maintenance, service and repair information for the BMW 3 Series from 2006 to 2011*. The aim throughout has been simplicity and clarity clarity,, with practical explanations, step-by-step procedures procedur es and accurate specifications. Whether you’re a professio professional nal or a do-it-yourse do-it-yourself lf BMW owner owner,, this manual helps you understand, care for and repair your BMW.
Learn how to reset condition based service (CBS) intervals using iDrive or stalk switch (cars without iDrive). 020 Maintenance
Features
• Maintenance procedures from changing the ATF to replacing the cabin microfilter. This manual tells you what to do and how and when to do it. • Step-by-step variable camshaft timing (VANOS) service. • Cylinder head cover gasket and crankshaft seal replacement. • Cooling system and radiator service. • Fuel injection and ignition system diagrams and explanations. • Information about advanced technical features such as Valvetronic, xDrive, twin turbo boost and DSC (dynamic stability control). • Suspension repair procedures. • Brakes, steering and ABS troubleshooting and repair. • Heating and air-conditioning repair, including A/C component replacement. • Body and hood repairs and adjustments. • Electrical system service, with an easy-to-use illustrated component locator section. • Comprehensive wiring schematics, including fuses and grounds. • BMW OBD II diagnostic trouble codes, SAE-dened OBD II P-codes, as well as basic scan tool operation. • BMW factory tolerances, wear limits, adjustments and tightening torques. * This manual covers the 2012 BMW 3 Series Coupe (E92) and the 2012 BMW 3 Series Convertible (E93). The E92 and E93 models were extended through the 2012 model year.
Servicing the high pressure fuel system on turbo models, including replacing HPI fuel pump. 160 Fuel Tank and Fuel Pump
Bentley technical editors removing Valvetronic motor on N51 engine.
Normally aspirated models (6-cylinder 3.0 engines) • N52 engine: 325i, 325xi, 330i, 330xi (2006) • N52KP engine 328i, 328xi (2007-2011) • N51(SULEV) engine: 328i, 328xi (2007-201 (2007-2011) 1)
Turbo-charged models (6-cylinder 3.0 engines) • N54 engine: 335i, 335xi (2009 - 2010), 335is (2011) • N55 engine: 335i, 335xi (2011)
Bentley Publishers, 1734 1734 Massachusetts Avenue, Cambridge, MA 02138-180 4 USA Tel: 617-547-4170 • Toll Free: 800-423-45 95 • Fax: 617-876-9235 http://www.bentleypublis http://www .bentleypublishers.com/contact-us hers.com/contact-us bentley_b311_new.product.announcement.pdf
