Renault LAGUNA 2000 Manual page 36

K4M engine
Procedure for tensioning the timing belt
Check that the crankshaft is resting on pin Mot. 1489.
Tighten the crankshaft pulley bolt to a torque of
2 daNm, then angle tighten to 135° ± 15° (crankshaft
resting on the Top Dead Centre pin).
Tighten the exhaust camshaft pulley to a torque of
3 daNm then turn through an angle of 84°.
Remove camshaft timing tool Mot. 1496 camshaft
pulley locking tool Mot. 1490 and Top Dead Centre pin
tool Mot. 1489.
VALUES AND SETTINGS
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Checking the timing and the tension
Checking the tension
Turn the crankshaft clockwise twice (timing end) and
before the end of the second turn, tighten the pin
Mot. 1489 in the cylinder block and move the
crankshaft slowly and smoothly to rest on the pin.
Remove the Top Dead Centre pin.
Check that the pulley indices are aligned, otherwise
continue with the tensioning procedure. Slacken the
tension wheel nut by a maximum of one turn, holding it
with a 6 mm Allen key.
Align the adjustable index with the fixed index and
tighten the nut to a torque of 2.7 daNm.
Checking the timing
Ensure that the tension wheel indices are in the
correct position before checking the setting of the
timing.
Tighten the pin Mot. 1489 in the cylinder block then
position and hold the crankshaft resting on the pin.
Fit (without forcing) tool Mot. 1496 for setting the
camshaft pulleys (the camshaft grooves must be
horizontal).
The timing setting and tensioning operation must
be repeated if the tool does not engage.
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