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1.Remove the upper tightening bolt of the auto-tensioner.
2.
| caution |
The auto-tensioner rotates centreing on the flange bolt
due to the rod thrust, so please make sure your finger is not trapped.
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Slowly loosen the (lower) tightening bolts of the auto-tensioner. Remove the auto-tensioner
rod from the tensioner arm and tilt the auto-tensioner to the stopper position.
3.Remove the lower tightening bolt of the auto-tensioner.
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1.Before the timing belt is removed, align the timing marks of the camshaft sprocket
and crankshaft sprocket with the No.1 at the Top Dead centre of the compression stroke.
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Mark the belt running direction for reference in reinstallation.
| note |
If there is oil or water on any part, check the front case oil seal, camshaft oil seal,
and water pump for leaks.
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| note |
After the timing belt is removed, do not turn the crankshaft sprocket and the camshaft
sprocket.
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| caution |
Because of the shallow hexagon hole of the hexagon socket
head bolt, firmly insert the tool and carefully work not to damage the hexagon hole.
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Remove the idler pulley using a hexagon wrench with 8 mm width across flats.
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Use special tools End yoke holder (MB990767) and Pins (MD998719) to prevent the camshaft
sprocket from turning, and then loosen the camshaft sprocket bolt.
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Use special tools End yoke holder (MB990767) and Pins (MD998719) to prevent the camshaft
sprocket from turning, and then tighten the camshaft sprocket bolt.
Tightening torque: 90 ± 10 N·m
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1.Clean the hole in the crankshaft sprocket.
2.Clean and degrease the mating surfaces of the crankshaft sprocket.
| note |
Degreasing is necessary to prevent decrease in friction on the mating surfaces.
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3.Install the crankshaft sprocket to the crankshaft.
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| caution |
Because of the shallow hexagon hole of the hexagon socket
head bolt, firmly insert the tool and carefully work not to damage the hexagon hole.
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Install the idler pulley using a hexagon wrench with 8 mm width across flats.
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1.Check the timing marks of the crankshaft sprocket and the camshaft sprocket are aligned
with the No.1 at the Top Dead centre of the compression stroke. If they are not, align the timing
marks again, paying attention to the interference between the valve and the piston.
2.Install the timing belt on each sprocket in the following sequence.
(1)
Install the timing belt on the crankshaft sprocket and then on the water pump pulley,
while tightening it to prevent slackness.
(2)
Line up the timing marks of the left bank camshaft sprockets.
(3)
Install the timing belt on the idler pulley, while taking up the slack.
(4)
Install the timing belt on the right bank camshaft sprocket.
(5)
Install the timing belt on the tensioner pulley.
3.Check to see that the timing marks of all the sprockets are in a alignment.
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4.Using special tool Crankshaft wrench (MD998716), rotate the crankshaft a quarter of a
turn counterclockwise. Then rotate it back clockwise to verify that all the timing marks are in
alignment.
5.Pull out the pin of the auto-tensioner.
6.Rotate the crankshaft two turns clockwise and leave it alone for approximately five
minutes.
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7.Check that the projection of the rod of the auto-tensioner is within the standard value.
Standard value: 9.1 - 13.4 mm
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