BMW 3 Series Service Manual (E39)
.pdf116-15
Cylinder Head and Valvetrain
4 Remove primary timing chain tensioner plug (arrow) and primary tensioner.
CAUTION-
Primary timinq chain tensioneris undersarinaaressure.
4 Remove primary timing chain sprocketand timing chain from exhaust camshaft.
-Remove crankshaft locking tool (BMW 11 2 300) from flywheel (installed during VANOS removal).
Lift timing chain (holding under tension) and rotate engine counterclockwise- 30" from TDC.
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Cylinder Head and Valvetrain
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<
Remove cylinder head cover retaining studs (arrows) from center and rear of cylinder head.
Remove spark plugs and install BMW special tool 11 3 260
(A) and 11 3 270 (6) to cylinder head. Tighten tool retaining bolts in spark plug bores. Do not overtighten bolts.
Tightening torque |
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BMW special tool 11 3 260 I 1 1 3 270 to |
23 Nm (17 It-lb) |
cylinder head |
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- Remove intake camshaft bearing cap for cylinder number 1.
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CAU T I O G
Intakecamshaft bearingcap 1 is centeredwith adapter sleeves. To avoidcan~sllaftdaniage, it must be removedbsfore any other caps.
Turn eccentric shaft on special tool until pressure is applied to camshaft bearing caps.
Remove remaining bearing cap mounting nuts
Slowly release pressureon camshaft bearing caps by turning eccentric shaft. Remove bearing caps and camshaft. Repeat procedure on remaining camshaft.
CAUTION-
Camshaftbearingcaps mustbe reinstalledintheir originallocations.
NOTE-
The camshaft bearing caps are coded with a letter anda number. For example, 'XI"is the first exhaust camshaft bearingcap at the front of the engine, and "El"is the intalce camshaft bearing cap at the front of the engine.
0The camshafts are stamped with a code letter - "E"for the intake side and 'MA"for the exhaust side.
0"Eis for Einlap, (German for intake) and 'XA"isfor Auspuff, (German for exhaust).
Cylinder Head and Valvetrain
4 Secure hydraulic lifters in lifter bores using BMW special tool 1 1 3 250, or remove lifters using a magnetic pick-up tool.
4 Remove camshaft bearing carrier from cylinder head.
CAUTION-
Camshaftbearingcarriers must be reinstalledin their original / locations (E for ir;fal<eand A for exhaust).
NOTE-
Do not let hydraulic lifters fall out as the camshaft carrier is removed.
Hydraulic lifters should be stored in an upright position. Used hydraulic lifters must be replaced into original lifter bores.
Camshafts and lifters, installing (M52Engine)
Lubricate camshafts, camshaft carriers, bearing caps, hydraulic liflers, friction washers,splined shafts and spline hubs with assembly lubricant before installation.
Make sure the cranltshaft, which had been rotated approximately 30" opposite the direction of engine rotation from TDC,is still in thatpositionbefore lowering the camshaffs into position. All pistons must be out of TDCposition to prevent valve/pistoninterference when the camshalts are installed.
Before installing camshaft carriers, examine bearing bores (arrows)on hydraulic lifter bores for signs of wear.
116-18
Cylinder Head and Valvetrain
4 Install camshaft carriers with hydraulic lifters into cylinder head. Note marks on carriers: (E)for intake side and ( A )for exhaust side.
4 Center camshaft carrier on pins (arrows)at bearing positions 2 and 7.
4 Install camshafts with number 1 cylinder camshaft lobes facing each other (arrows).
CAUTION-
A minimum waiting time is required for the hydraulic lifters to 'bleed down" after installing the camshafts into the cylinder head, before bringing the pistons to TDC. When the camshafts are removed, the hydraulic lifers can expand. This expansion can cause increased valve lift when the camshafts are bolted down, possibly resulting in piston interference.
Camshaft Installation waiting times |
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68" F (20" C) or above |
4 minutes |
50-68' F (10-20°C) |
11 minutes |
32-50" F (0-1 0" C) |
30 minutes |
Cylinder Head and valvetrain1
-Remainder of installation is reverse of removal, noting the following:
See 117 Camshaft Timing Chain for VANOS control unit installation.
Tightening torques |
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Camshaftbearingcaps to cylinder head (M7) |
15 Nm (11 ft-lb) |
Cylinder head cover to cylinder head (M6) |
10 Nm (89 in-lb) |
Sparic plugs (M12) |
23 Nm (17ft-lb) |
Camshaft and lifter, removal and installation (M52 TU and M54 engine)
Camshafts and lifters, removing (M52 TU and M54 engine)
WARNING-
Allow engine fo coolbefore beginningthis procedure.
- Disconnect negative (-) cable from battery.
CAUTION--
Prior to disconnecting the battea readthe battery disconnection cautions in 001 General Cautions and Warnings.
Remove VANOS control unit. See 117 Camshaii Timing Chain.
Remove primary timing chain tensioner (arrow).
CAUTION- |
1 |
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Primary timingchain tensioneris underspringpressure. |
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/Cylinder Head and Valvetrain
Pressdown on secondary chain tensionerand loclc into place using BMW special tool 11 3 292, or a thin drift or pin.
4 Remove exhaust camshaft impulse wheel mounting nuts (arrows). Remove impulse wheel (A).
< Remove spring plate (A).
4 Remove intake camshaft sprocket mounting nuts (arrows) and remove spring plate (labelled FRONT).
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ICylinder Head and Valvetrain
Remove torx screws from exhausl:camshaft: sprocket (arrows).
Lift off exhaust and intaltesprockets together with secondary chain, thrust spacer (A) from exhaust camshaft, and splined shaft (B) from intake camshaft.
CAUTIOf+
Splinedshafts share the same part numberfor both intake and exhaust camshafts. Usedsplinedshafts mustbe reinstalledin their oriqinallocations.
Place intalte and exhaust sprockets in BMW special tool 116 / 180. Position spline gap on intake sprocket (arrow) as
shown.
4 Remove exhaust camshaft splined sleeve (A) and shaft (B).
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Cylinder Head and Valvetrain
Remove secondary chain tensioner mounting bolts (arrows) and remove tensioner with locking tool in place.
Remove primary chain sprocket mounting studs (arrows) on exhaust camshaft.
NOTE-
Counterhold camshafts when loosening.
Lifl primary chain sprocket off exhaust camshaft. Remove sprocket from chain.
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Cylinder Head and Valvetrain
Place timing chain on end of exhaust camshaft
4 Do not remove end spline retaining screws from camshafts (arrows).
CAUTION-
The endspline retainingscrewspreciselylocate the end splines to the camshafts. Do not loosen these screws.
Remove locating studs (arrows) from intake camshaft. Lift off intake camshaft thrust spacer (A) and impulse wheel (B)
4 Remove cylinder head cover mounting studs (arrows) from center of cylinder head.
-Remove crankshaft lockingtool (BMW special tool 11 2 300) from cranltcase.
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ICylinder Head and Valvetrain
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4 Lift primary chain and hold under tension, rotate engine against direction of rotation (counterclockwise)approximately 30".
To preventdamaging valves while worlcing on camshafts, no aistonsshould be in the TDC position.
-Remove BMW special tool set 1I 3 240 from rear of cylinder head.
Remove retaining nuts (arrows) and bearing cap 1 of intake camshaft.
Intake camshaftbearing cap 1is centeredwith adapter sleeves. To avoidcamshaft damage, it must be removedbefore anv other caos.
4 Fit BMW special tools 11 3 260 (A)and 11 3 270 (B)to cylinder head and screw long bolts (aiiows) into spark plug threads. Tensioners will align with the bearing caps on the intake camshaft.
CAUTION-- |
1 |
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Do not over torque bolts into spark plug holes. |
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4 Turn eccentric shaft of special tool to pretension intake carnshaft bearing caps. Remove nuts on remaining bearing caps.
-Slowly release tension on eccentric shaft and remove BMW special tools. Remove bearing caps and set aside in order. Remove camshaft and store safely.
CAUTIOW-
Camshaftbearingcaps must be installedin their originallocations.