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Toothed Belt Tension, Adjust
Note: Adjustment is
carried out with the engine cold – at room temperature.
The toothed belt tension must be checked as a precondition for
this operation. This means that the crankshaft is set to 1st
cylinder TDC and the camshaft pulleys are fixed in position with
KM-852 – see operation "Toothed Belt Tension, Check".
 Adjust
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Release fastening bolt for toothed belt tension roller (I).
Tension toothed belt tension roller (I) at adjustment eccentric
in direction of arrow (anticlockwise) until pointer for toothed
belt tension roller is located just before right stop (I). Hand
tighten fastening bolt for toothed belt tension roller.
 Remove
Remove Locking Tool KM-852.
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Inspect
At the fastening bolt of the toothed belt drive gear, turn the
crankshaft two rotations (720°) in the direction of engine
rotation to mark "1st cylinder TDC" (III). The marks on the
camshaft pulleys must be aligned (II). Turn crankshaft slowly and
smoothly.
Install
Fix camshaft pulleys in position with KM-852.
Adjust
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Adjustment of new toothed belt:
Partly release fastening bolt for
toothed belt tension roller and turn adjuster eccentric in
direction of arrow (clockwise) until:
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Option I:
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Pointer (1) for toothed belt tension roller aligns with the
notched mark (2).
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Option II:
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Pointer (1) for toothed belt tension roller aligns with the
"NEW" notched mark (2).
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Install
Tighten fastening bolt for toothed belt tension roller –
tightening torque 20 Nm / 15 lbf. ft.
Remove
Remove Locking Tool KM-852.
Inspect
Turn crankshaft another two rotations (720°) in direction of
engine rotation to mark "1st cylinder TDC" and check adjustment of
toothed belt tension roller.
If the pointer for the toothed belt tension roller does not
align with the corresponding notch mark, repeat the adjustment
procedure.
Adjust
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Run-in Toothed Belt, Adjust:
Partly release fastening bolt for
toothed belt tension roller and turn adjuster eccentric in
direction of arrow (clockwise) until:
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Option I:
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Pointer (1) of toothed belt tension roller is approx. 4 mm to
the left of the notched mark (2).
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Option II:
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Pointer (1) for toothed belt tension roller aligns with the mark
"USED" (2).
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Install
Tighten fastening bolt for toothed belt tension roller –
tightening torque 20 Nm / 15 lbf. ft.
Remove
Remove Locking Tool KM-852.
Inspect
Turn crankshaft another two rotations (720°) in direction of
engine rotation to mark "1st cylinder TDC" and check adjustment of
toothed belt tension roller.
If the pointer for the toothed belt tension roller does not
align with the corresponding notch mark, repeat the adjustment
procedure.
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