Man D 2840 LE 301, Repair Manual

Page: 97 / 194

8
9
10
11
Removing and installing cylinder head
95
Installing cylinder head
Fig. 8
Before installation clean and blow out threaded
bores in crankcase. Clean sealing faces on
cylinder 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. 9
Each cylinder head is located with two fitting
sleeves.
Fig. 10
Check whether the cylinder head bolts have the
max. permissible length (see: ”Engineering, data
and 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
inserting them and apply ”Optimoly WhiteT”
assembly paste to the contact face of the bolt
head.
Fig. 11
Tighten bolts by angle. Observe order of tightening
and specified tightening method, and see
instructions and notes on the cylinder head bolts in
the publication “Service Data”.
Note:
To avoid any distortion between cylinder
heads and exhaust manifolds, we recom-
mend proceeding as follows:
D
Place cylinder head gaskets and cylin-
der 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; tight-
ening torque for mounting bolts: 20
Nm.
If a steel ruler is not available, mount
exhaust manifold and tighten to 20 Nm.
D
Tighten cylinder head bolts as speci-
fied.
D
Remove steel ruler.
D
Tighten exhaust manifold and intake
manifold to specified torque.