BMW 3 Series Service Manual (E39)
.pdf113-67
Cylinder Head Removal and l n s t a K I
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<Using a torque angle gauge, tighten cylinder head bolts to specified torque angle in stages 2 and 3.
Tightening torques |
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Stage I |
30 Nrn (22 ft-lb) |
Stage II |
+80° |
Stage Ill |
+80° |
4 If possible, confirm oil return pipe at bottom of separator is correctly seated (arrow).
NOTE-
Photo shows lower timing case cover removed.
<Remove old O-ring and install new O-ring (arrow) in angle section.
-Press oil separator into angle section and install guide rail retaining screws.
4 Tighten allen screw (arrow) just until it makes contact with crankcase vent tube angle section without play.
NOTE-
Allen screw secures crankcase vent tube in place. Do not torque down.
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Cylinder Head Removal and Installation
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<Using BMW special tool 11 3 430, or a 27 mm open-ended wrench, rotate camshafts to cylinder 1 TDC position (until markings point upwards).
<Install camshaft locltina tool set (BMW soecial tool set 11 2
440)on right cylinder head (cylinders 1-4). Fit on cylinde~ head without gaps.
Install camshaft locking tool set (BMW special tool set 11 2 440) on left cylinder head (cylinder head 5-8). Fit on cylinder head without gaps.
4 Using crankshaft center bolt, rotate engine clockwise from the 45" mark to TDC position (OIT aligns with casting mark on cylinder block).
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Cylinder Head Removal and Installation
4 Lock crankshaft in TDC position with BMW special tool 113 200 (arrow).
NOTE-
Boss for special tool 11 3 200 located at rear of engine oil pan.
4 Working at left cylinder head (driver's side)fit primary sprocket and chain to camshaft flange, centering threaded bores.
Insert bolts (arrows) and hand tighten.
?-I |
I 4 Install BMW special tool 11 3 390 into right timing case cover. |
NOTE-
BMW special tool 00 9 250 is a flexible shaft torque wrench.
I - Tighten sprocket retaining bolts in the following order:
All bolts on left cylinder head exhaust camshaft
3 accessible bolts on right cylinder head exhaust camshaft
All bolts on left cylinder head intake camshaft
3 accessible bolts on right cylinder head intake camshaft
r"".."..7n
Tightening torques
Sprocltet bolts to camshait flange |
15 Nm (11 ft-lb) |
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Remove camshaft and crankshaft locking tools from engine.
Using crankshaft center bolt, turn engine clockwise to access remaining sprocket retaining bolts of right cylinder head camshafts. Tighten remaining bolts.
Tightening torques
Sprocket bolts to camshaft flange |
15 Nm (11 ft-lb) |
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Cylinder Head Removal and Installation
-Remove adjustable timing chain tensioner tool from timing case cover and install primary timing chain tensioner with new sealing washer.
Tightening torque
Chain tensioner cylinder to timing cover |
65 Nm (48 ft-lb) |
4 Install oil supply lines and mounting nuts (arrows) to both heads.
Tightening torque
Oil supply line nuts |
10 Nm (7.5 ft-lb) |
-Remove old gasket from lefl timing cover, and clean gasket surface.
4 Apply Three Bond 1209 8 sealant to joint between cylinder head and timing cover (arrows).
Using a new gasket, install lefl timing cover with lower inner fastener inserted in cover (arrow). Position cover in place and tighten cover fasteners finger tight.
NOTE-
It is not possible to install lower inner fastener after cover is inplace.
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Cylinder Head Removal- |
and i n --s t a r d |
4 Remove left cylinder head cover gasket and install spacing tool (BMW 11 1 412) in place of gasket.
-lnstall lefl cylinder headcover fasteners and tighten uniformly in 'I2turn steps.
Tightening torque
Cylinder head cover nuts |
10 Nrn (7.5 it-lb) |
-Tighten left upper timing cover retaining bolts in two passes.
Tightening torque
Timing chain cover to head |
10 Nrn (7.5 ft-lb) |
-Remove lefl cylinder head cover and BMW special tool 11 4 412.
4 Reinstall cylinder head covers to left and right cylinder heads using new gaskets.
Check for correct seating of half-moon seals (A) in back of cylinder head cover.
Use a small amount of Three Bond 1209 03 or equivalent sealer at corners (6)of half-moon cutouts.
-Install left cylinder headcover fasteners and tighten uniformly in 'I?turn steps.
-Install exhaust manifolds using new gaskets and fasteners. See 180 Exhaust System.
/Cylinder Head Removal and Installation
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Remainder of installation is reverse of removal, noting the following:
Use new gaskets when mounting intake manifold. Tighten nuts finger tight first, then torque to specification in stages working diagonally from center out.
Be sure to reinstall ignition coil ground straps at cylinders no. 3 and no. 7. See 120 Ignition System.
Reinstall cooling fan and shroud. See 170 Radiator and Cooling System.
Refill and bleed cooling system as described in 170 Radiator and Cooling System.
Change engine oil and filter as described in 020 Maintenance.
CAU T I O G
To prevent damagingengine electricalsystems,be sure to install allground wires previously removed.
Tightening torques |
|
Camshaft sprocket to camshaft |
15 Nm (11 H-lb) |
Coolant manifoldto cylinder head |
10 Nm (7.5H-lb) |
Cylinder head cover nuts |
10 Nm (7.5 ft-lb) |
Exhaust manifold to head |
22 Nm (17ft-lb) |
Engine mounts to subirame |
42 Nm (30 ft-lb) |
Spark plugs to cylinder head |
22 Nm (17ft-lb) |
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Right cylinder head, removing, M62 engine
Remove left side exhaust manifold. See 180 Exhaust System.
Remove intake manifold. See Intake manifold, removal and installation, M62 engine.
Drain engine coolant. See 170 Radiator and Cooling System.
WARNING-
Use extremecaution when drainingand disposing of engine coolant. Coolanlispoisonousandlellial lo liumans andpels. Pets are altracled to coolant because of 11s sfieet smell and
fasle. Seelc medcalanenfionimmed~alelyif coolantis ingesl- |
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<Remove engine coolant manlold m o ~ n l n gfasreners and carei~llyremove manifod.
NOTE
Engine 8s slioivn removed lor clarify
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1
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Cylinder Head Removal and Installation/
-Remove viscous clutch cooling fan. See 170 Radiator and Cooling System.
4 Remove ignition coil fasteners and coils (noting location of ground strap).
Remove sparlc plugs.
Remove oil distribution tube fasteners and remove tubes from both cylinder heads.
4 Using crankshaft center bolt, turn crankshaft cloclcwise until number one cylinder (front cylinder right side) is in TDC (arrows).
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Cylinder Head Removal and Installation
4 Work at left side cylinder head loosen three accessible camshaft sprocketfasteners (arrows) on both intake and exhaust camshafts approximately ' I 2 turn.
Topreventvalve topiston contact, counterholdcamshaft with 27 mm open-endwrench whenever looseningor tightening camshaftsprocket fasteners. Ifnecessarq!grindouterside of wrenchjaws to prevent damagingcylinder head.
4 Rotate crankshaft one complete rotation to TDC overlap. Right (passenger's sideof engine) side camshaft lobes for number one cylinder should be in overlap position as shown (arrows).
4 Working at left cylinder head, loosen remaining sprocket fasteners (arrows) on both intake and exhaust camshafts approximately ' I 2 turn.
113-75 Cylinder Head Removal and InstallationI
4 Loosen and remove primary timing chain tensioner (arrow) from right cylinder head.
Remove camshaft position sensor (arrow) from upper timing chain cover on right cylinder head.
Remove dip stick tube support fastener.
Remove upper timing chain cover fasteners (A) and remove cover from right cylinder head.
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Cylinder Head Removal and Installation
Remove fasteners from intake camshaft sprocket (arrows) on right cylinder head.
-Remove primary timing chain sprocket and suspend timing chain using mechanics wire to prevent chain from dropping into lower housing.
Turn crankshaft counterclockwise until 45" mark on crankshaft is aligned with boss on front timing chain cover (arrow)
4 Loosen cylinder head bolts in sequence 1-10 as shown (arrows) and discard used head bolts.
-Evaluate cylinder head. See 116 Cylinder head and valvetrain.