11.27
When installing:
•
While installation is basically just a reversal of the
removal procedure, special attention should be
devoted to the following points:
e
Attention:
Install bucket tappets in their original locations,
seizure hazard.
•
Thoroughly oil the bucket tappet contact surfac-
es and install them in their original positions in
the cylinder head
•
Follow installation instructions for camshaft bear-
ing caps/camshafts (
a
11.37)
•
Turn the engine over several times by hand
– Check valve clearances (
a
11.15) adjust as in-
dicated (
a
11.16)
Wear data:
Bore ..............................max. 26.04 mm (1.0252 in)
Radial clearance..............max. 0.10 mm (0.0049 in)
Fluids and lubricants:
Guide rail............................................... Loctite 243
Camshaft sprocket ................................ Loctite 243
X
Torque specification:
Guide rail mount........................................... 10 Nm
Camshaft sprocket mounts ......................... 30 Nm
Camshaft bearing caps ................................ 10 Nm
Threaded plug for TDC set bolt .................... 15 Nm
Threaded plug for chain tensioner................ 35 Nm
Lower strut mount ........................................ 21 Nm
Inlet and exhaust valve
Removing valves
– Swivel out powertrain cradle (
a
11.12)
– Remove cylinder head cover (
a
11.34)
– Remove spark plug (
a
12.5)
– Lock engine at TDC (
a
11.14)
– Remove guide rail (
a
11.38)
L
Note:
The camshafts can also be removed and installed
with the sprockets attached.
– Remove chain tensioner (
a
11.33)
– Remove camshaft sprockets (
a
11.35)
– Remove camshafts and camshaft bearing cap
(
a
11.36)
L
Note:
Take care to ensure that the timing chain does not
fall into the housing! Secure the timing chain to keep
it tight!
•
Secure the timing chain to prevent it from falling
– Removing cylinder head (
a
11.40)
e
Attention:
Always note the original positions of all bucket tap-
pets, inlet and exhaust valves, valve springs, valve
caps and collets, marking them as necessary!
– Removing bucket tappets (
a
11.26)
L
Note:
Tap the valve cap with a plastic hammer to facilitate
removal of the valve collets.
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