Rotate inlet camshaft (E) at hexagon (2) slowly and carefully in direction of engine rotation until hydraulic chain tensioner is pressed together.
Insert special tool 11 3 340
into chain tensioner (1).
Caution! If the sprocket wheel is removed without the hydraulic chain tensioner being locked, the chain tensioner piston will slip out and can then only be pressed back again with a considerable amount of effort.
Caution! Do not release bolts.
RA Replacing camshafts (M57TU) Issue status (12/2007) Valid only until next DVD is issued
BMW AG - TIS Copyright
04.07.2014 16:41 Page - 3 -
Release bearing pins (1). Release bolt (6). When releasing camshaft bolt connections (6) and (3), grip camshafts at hexagons. Remove gear wheel (7).
Press tensioning rail (3) downwards. Pull sprocket wheel (1) with timing chain to one side (see arrow). Pull out guide rail (2) (see arrow).
Remove tensioning rail (1) towards top. Lay timing chain (2) to one side and secure against falling down with a cable tie (3). Remove inlet camshaft sprocket wheel (4).
RA Replacing camshafts (M57TU) Issue status (12/2007) Valid only until next DVD is issued
BMW AG - TIS Copyright
04.07.2014 16:41 Page - 4 -
Evenly release screws of camshaft bearing covers (1) in 1/2 turn steps from outside to inside. Remove bearing covers and place to one side in orderly fashion.
Remove inlet camshaft (1) and carefully place to one side. Remove exhaust camshaft (2) and carefully place to one side.
Note: Worn rockers may only be reused on the same grooves of the camshaft. Remove finger rockers individually and check rollers for ease of movement.
Note:
RA Replacing camshafts (M57TU) Issue status (12/2007) Valid only until next DVD is issued
E
Inlet camshaft
A
Exhaust camshaft
BMW AG - TIS Copyright
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Install camshafts. The inlet camshaft bearing covers are marked E 1 ... E 7 from the exhaust side. The exhaust camshaft bearing covers are marked A 1 ... A 7 from the exhaust side. Fit bearing caps.
Align camshafts so that cam tips of inlet and exhaust camshafts of 1st cylinder point in direction of travel to right. See illustration.
Insert all screws (1) and initially tighten so that they are free of play. Tighten down camshaft bearing caps in 1/2 turn increments evenly from inside to outside. Tightening torque, 11 31 1AZ . Caution! Risk of camshaft breakage.
Mount inlet camshaft gear wheel (1) and secure inlet camshaft with special tools 11 6 321 and 11 6 322 in firing TDC position of first cylinder. Fit tensioning rail (4). Install sprocket wheel (5). Install guide rail (2). Tighten bolt (6) hand-tight Slacken bolt (6) by a 1/2 turn. Insert bearing pins (3). Installation: Tightening torque, 11 31 12AZ
.
Installation: Replace bolts (3) and (6).
RA Replacing camshafts (M57TU) Issue status (12/2007) Valid only until next DVD is issued
BMW AG - TIS Copyright
04.07.2014 16:41 Page - 6 -
Mount exhaust camshaft gear wheel (1) and secure exhaust camshaft with special tools 11 6 321 and 11 6 322 in firing TDC position of first cylinder. Tighten bolt (2) hand-tight Slacken bolt (2) by a 1/2 turn. Note: Replace bolt (2).
RA Replacing camshafts (M57TU) Issue status (12/2007) Valid only until next DVD is issued
.
BMW AG - TIS Copyright
04.07.2014 16:41 Page - 7 -
Fit special tool 11 6 320
on exhaust camshaft.
Note: When tightening camshaft screw connection, grip camshafts at hexagon drive. Tighten down exhaust sprocket wheel with special tool 00 9 120 . Tightening torque, 11 31 4AZ
Fit special tool 11 6 320
.
on inlet camshaft.
Note: When tightening camshaft screw connection, grip camshafts at hexagon drive. Tighten down inlet sprocket wheel with special tool 00 9 120 . Tightening torque, 11 31 4AZ .
Note: Remove special tools 11 6 321
and 11 2 300 .
Using special tool 11 6 480 , crank engine twice in direction of engine rotation until first cylinder is back in TDC firing position. Check camshaft setting. Caution! Do not turn the engine back .
RA Replacing camshafts (M57TU) Issue status (12/2007) Valid only until next DVD is issued
Fit special tool 11 6 321
on inlet camshaft (1).
Note: Special tool 11 6 321
must lie flush on cylinder head.
BMW AG - TIS Copyright
04.07.2014 16:41 Page - 8 -
Fit special tool 11 6 321
on exhaust camshaft (1).
Note: Special tool 11 6 321
must lie flush on cylinder head.
Remove all special tools. Assemble engine.
RA Replacing camshafts (M57TU) Issue status (12/2007) Valid only until next DVD is issued
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