Man D 2866 LE 401, Repair Manual

Page: 82 / 138

9
10
11
12
Removing and installing cylinder head
81
Installing cylinder head
Fig. 9
Before installation clean and blow out threaded
bores in crankcase. Clean sealing faces on cylin-
der head and crankcase.
Lay new cylinder head gaskets in place in dry
condition, ensuring that the holes match those in
the crankcase, and place cylinder head on top.
Fig. 10
Each cylinder head is located with two fitting
sleeves (arrow).
Fig. 11
Check whether the cylinder head bolts have the
max. permissible length (see: ”Engineering
S
Data
S
Setting values”). Bolts that have been removed
may be used again if the max. permissible length
is not exceeded.
Coat cylinder head bolts with engine oil before in-
serting them and apply ”Optimoly WhiteT” assem-
bly paste to the contact face of the bolt head.
Fig. 12
Tighten bolts by angle. Observe order of tightening
and specified tightening method, and see instruc-
tions and notes on the cylinder head bolts in the
publication ”Engineering
S
Data
S
Setting values”.
Note:
To avoid any distortion between cylinder
heads and exhaust manifolds, we recom-
mend proceeding as follows:
D
Place cylinder head gaskets and cylinder
heads in position.
D
Screw in head bolts by a few turns.
D
Secure steel ruler (special tool) with
ground face on the exhaust side; tighten-
ing torque for mounting bolts: 20 Nm.
If a steel ruler is not available, mount ex-
haust manifold and tighten to 20 Nm.
D
Tighten cylinder head bolts as specified.
D
Remove steel ruler.
D
Tighten exhaust manifold and intake man-
ifold to specified torque.
3520
3521
2811
3522