Group 27 Reconditioning engine
Thread repairs
Tang
Mandrel
Crank
A9
Fit thread insert in installation tool
Fit the thread insert in the tool with the tang facing
downwards.
Turn the crank clockwise until the tang of the thread
insert engages the slot in the crank.
Without pressing, screw the thread insert into the
mandrel until the first thread of the insert is flush with
the opening of the mandrel.
AW
Install thread insert
Hold the tool vertically above the centre of the hole.
Without pressing, screw in the thread insert until the
top thread of the insert is at least 1/2
a
thread below the
working surface (0.5 x pitch). The insert must not be
screwed in to the bottom otherwise it will not be pos-
sible to break off the tang.
AH
Break off tang
M16-M12
threads:
use the tang breaker in the installa-
tion kit.
M14 and
coarser
threads:
use a pair of
flat nosed pliers
to break off the tang downwards.
Remove the tang from the hole.
18
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