Group
21
Reconditioning engine
Important information
Important information
Tightening torques
Nearly all of the
B
27/28 engine is made of aluminium
alloy.
The
threads
are
tapped directly into the alloy. For
this reason it is extremely important that all of the bolts
are tightened to specified torque.
Two types of tightening torques are used in this manu-
al:
I.
Tightening torque 40
Nm
(30
ftlbs)
= a torque
wrench must be used.
II.
Tightening torque
40
Nm
(30
ft.lbs) = correct value,
however it is not necessary to use a torque
wrench.
Specifications
Group 20 General
Engine serial number and part number
Located on a plate in front of the oil filter.
On
B
28 E/F
1981-
models: located on the rear of the
right-hand cylinder
head,
shows the last three digits of
the part number.
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