BMW 5251 Service Manual page 148

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[Cylinder
Head Removal and Installation
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-1
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4
Insert and secure VANOS sealing plugs (arrows) with new
sealing O-rings.
Tightening torque
Sealing plug to VANOS
50 Nm (37 ft-lb)
4
Install coolant pipe fasteners at base of cylinder head and
tighten fasteners (arrows).
NOTE-
Use new sealing O-ring on coolant pipe.
-
lnstall VANOS oil line banjo bolt with new seals. Attach oil
line to VANOS unit.
Tightening torque
Oil line to VANOS unit
(banjo bolt)
32 Nm (24 ft-ib)
-
Remove adjustable timing chain tensioner tool and reinstall
chain tensioner.
Tightening torque
Primary chain tensioner cylinder to
cylinder head
70 Nm
(52
fi-ib)
-
Remove flywheel locking tool from transmission bell housing.
Replace special tool bore sealing plug.
-
Remove camshaft locking tools from cylinder head
4
lnstall intake camshaft cover and cylinder head cover.
0
Check for correct seating of half-moon seals (A) in back of
cylinder head cover.
Use a small amount of Three Bond 1209 8 or equivalent
sealant at corners (B) of half-moon cutouts.
Seat gasket and seal corners in front of cylinder head at
VANOS unit.
Tightening torque
Cylinder head cover to cylinder head
(M6)
10
Nm
(89
in-lb)