Group 21 Engine
Timing
gear
belts, tension
Incorrect belt tension
lJnscrew
expansion tank cap to release
overpressure
from cooling syslem.
Tum engine approx. 1/4 turn
anticlockwise to obtain
slack
part
of bslt on driving side. lf this is not done
injection
pump
setting will be incorrect.
Turn crankshaft with
27 mm socket or 5188.
Adjust belt
tension to 12.5 units on
gauge
5197 by
moving
coolant
pump
mounting bracket.
lf
gear
belt tension
has
been adiusled
Turn engine at le6st one turn clockwise and check that
belttension is 12-13 units on tool5197. Adjust if neces-
saryaccording to
operations
K2-3 and rechecktension,
Install timing
gear
covers
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