BMW 5251 Service Manual page 149

Cylinder Head Removal and Installation
-
Install exhaust manifolds using new gaskets and nuts. Coat
manifold studs with copper paste prior to installing nuts.
Tightening torque
Exhaust maniiold to cylinder head (M7) 20 Nm (15 ft-lb)
-
Install electrical harness connectors for oil pressure sender
and coolant temperature sensor before installing intalte man-
ifold.
7
Install intake manifold:
1. Manifold mounting nuts: tighten to 15 Nm (1 1 ft-lb)
2. Fuel pipe bracltet
3. Fuel pipe bracltet
4. Vacuum pump bracltet
5. Manifold mounting bracltet
6. Tank venting valve bracltet
7. Mounting bracket to manifold bolt (M6)
8.
Mounting bracket to cylinder block nut (MIO), tighten to
47 Nm (33 fi-lb)
Intake manifold installation is reverse of removal, noting the
following:
*
Use new fuel injector seals.
Carefully check intake manifold gasket and replace if nec-
essary.
Inspect O-ring seal between mass air flow sensor and air
filter housing. To facilitate reassembly, coat seal with acid-
free grease.
Use new fuel injector seals.
Carefully check intake manifold gasket and replace if
necessary.
CA UTIOPI-
When reattaching throttle assembly harness connector, con-
nector is fully tightened when arrows on connector andplug
line up.
Tightening torque
lntalte manifold to cylinder
head (M7)
15
Nm (1 1 it-lb)
~
~-
Mounting bracket to cylinder bloclt (M10) 47 Nm
(33
ft-lb)
Mounting bracket to intake manifold
(MI?)
10 Nm
(89
in-lb)