Man D 2840 LE 301, Repair Manual

Page: 162 / 194

Limit values
Service Data
Dimensions
160
Cylinder head bolts (6kt- oder Torx-Kopf)
Length With each tightening, the bolts are
deliberately stressed beyond the stretch
limit and each tightening thus extends
their length permanently. When the max.
length has been reached, the bolt may no
longer be used.
Angle of rotation symbol
new: 167,5 − 168 mm, max. 170 mm
new: 143,5 − 144 mm, max. 146 mm
new: 108,5 − 109 mm, max. 111 mm
Valve recess
Intake valve: 11,969 − 11,980 mm
Exhaust valve: 11,944 − 11,955 mm
Max. wear limit:
0.1 mm below base dimension
Do not reuse valves with damaged chro-
mium layer!
Valve recess for intake and exhaust
valve:
0,7
− 1,3 mm
Valve springs
Inner spring:
Free length (L), approx. 65,5 mm
Spring force at L46,3 mm: 131
− 155 N
Spring force at L = 32,3 mm: 260 − 300 N
Outer spring:
Free length (L), approx. 59 mm
Spring force at L46,46,8 mm: 330
− 360 N
Spring force at L* = 32,8 mm: 710 − 770 N
The lowest spring force is at the same
time the wear limit value.
90
+3
Ø
L
L*