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1.Using special tool Crankshaft pulley spacer (MD998769), Turn the crankshaft to bring the piston in No.1 cylinder to its TDC on the compression stroke.
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2.
| caution |
Water or oil on the belt shortens its life drastically, so the removed timing belt, sprocket, and tensioner must be kept free from oil and water. Do not immerse parts in cleaning solvent.
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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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Use special tool End yoke holder (MB990767), and Pulley holder pin (MD998719), to prevent the camshaft sprocket from turning, and then loosen the camshaft sprocket bolt.
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Use special tool End yoke holder (MB990767), and Pulley holder pin (MD998719), to prevent the camshaft sprocket from turning, and then tighten the camshaft sprocket bolt to the specified torque of 88 ± 10 N·m.
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1.Wipe dirt on the crankshaft sprocket hole using a rag.
2.Using a rag, wipe dirt on the crankshaft spacer, crankshaft sensing blade, crankshaft sprocket, oil pump case and crankshaft sprocket installation surface. And then perform degreasing.
| note |
Degreasing is necessary to prevent decrease in friction between the mating surface due to presence of oil.
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3.Align the location of pin and pin hole, and then apply equal force in the direction of the arrow.
| caution |
Do not bend the sensing blade when installing sprocket.
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4.Install the crankshaft sprocket to the crankshaft.
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If the auto-tensioner rod is fully extended, set it in the retracted position with the following procedure.
1.Set the auto-tensioner in a vice.
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2.Slowly close the vice to force the rod in until the set hole (A) of the rod is lined up with the set hole (B) of the cylinder.
3.Insert a wire [1.4 mm in diameter] into the set holes.
4.Remove the auto-tensioner from the vice.
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1.
| caution |
If the camshaft sprocket is rotated with the piston at the top dead centre on the compression stroke of the number 1 cylinder, the valve and piston might interfere.
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Move the timing mark of the crankshaft sprocket three teeth to slightly lower the piston below the top dead centre on the compression stroke of the number 1 cylinder.
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2.Line up the timing marks of the left bank camshaft sprockets.
3.Line up the timing marks of the right bank camshaft sprockets.
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4.Line up the timing marks of the crankshaft sprockets.
5.Install the timing belt on each sprocket in the following sequence.
(1)
Install the timing belt on the crankshaft sprocket and then on the idler 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 water pump 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.
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6.Lightly press the tensioner pulley against the belt and temporarily tighten the centre bolt.
7.Check to see that the timing marks of all the sprockets are in a alignment.
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8.Using special tool Crank pulley spacer (MD998769), rotate the crankshaft a quarter of a turn anti-clockwise. Then rotate it back clockwise to verify that all the timing marks are in alignment.
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9.Mount special tool Tensioner wrench (MD998767) and torque wrench on the tensioner pulley.
10.Torque it to 4.4 N·m with the torque wrench.
11.While holding the tensioner pulley in position, tighten the centre bolt to the specified torque of 48 ± 6 N·m.
12.Rotate the crankshaft two turns clockwise and leave it alone for approximately five minutes.
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13.Check to see whether the metal wire inserted when the auto-tensioner was installed can be removed without any resistance.
If the metal wire can be removed without any resistance, it means that the belt has a proper tension. Therefore, remove the metal wire. In this condition, check that the projection of the rod of the auto-tensioner is within the standard value.
Standard value: 4.8 - 5.5 mm
14.If the metal wire offers resistance when removed, repeat the previous steps 9 through 12 until a proper belt tension is obtained.
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