Timing Drive Components: Removal

WARNING: This page is about a different variant/trim than selected.

NOTE: Do not loosen or remove the crankshaft pulley bolt without first installing the special tools as instructed in this procedure. The crankshaft pulley and the crankshaft timing sprocket are not keyed to the crankshaft. The crankshaft, the crankshaft sprocket and the pulley are fitted together by friction, using diamond washers between the flange faces on each part. For that reason, the crankshaft sprocket is also unfastened if the pulley bolt is loosened. Before any repair requiring loosening or removal of the crankshaft pulley bolt, the crankshaft and camshafts must be locked in place by the special service tools, otherwise severe engine damage can occur.

NOTE: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan can cause engine failure.

NOTE: If it is necessary to install a new timing chain tensioner, a cast iron tensioner is to be replaced with an aluminum tensioner (6K254). The existing bolts must be discarded and replaced with new bolts (6K282).

With the vehicle in NEUTRAL, position it on a hoist. Refer to: Jacking and Lifting - Overview .
Remove the following items:
1. Fuel injection pump and tappet. Refer to: High-Pressure Fuel Pump .
2. RH fender splash shield. Refer to: Fender Splash Shield .
NOTE: The fuel injection cam lobe must be positioned at zero lift before removing the fuel injection pump housing.

Rotate the crankshaft pulley clockwise slowly until fuel injection cam lobe must be positioned at zero lift.

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Remove the nuts and position the fuel tube bracket aside.

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Remove the studs and the high-pressure fuel pump drive unit.

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Remove the engine front cover. Refer to: Engine Front Cover .
NOTE: The Camshaft Alignment Tool is for camshaft alignment only. Do not rely on the Camshaft Alignment Tool to prevent camshaft rotation. Damage to the tool or the camshaft can occur.

Install Special Service Tool: 303-1565 Alignment Tool, Camshaft.

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NOTE: Use an open-ended wrench to prevent the component from turning.

Using an open-ended wrench, loosen the exhaust VCT unit bolt.

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NOTE: Use an open-ended wrench to prevent the component from turning.

Using an open-ended wrench, loosen the intake VCT unit bolt.

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NOTE: If equipped with cast iron timing chain tensioner.
1. Using a small pick, release and hold the ratchet mechanism.
2. While holding the ratchet mechanism in the released position, compress the tensioner by pushing the timing chain arm toward the tensioner.
3. Insert a holding pin into the hole to retain the tensioner.
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NOTE: If it is necessary to install a new timing chain tensioner, a cast iron tensioner is to be replaced with an aluminum tensioner (6K254). The existing bolts must be discarded and replaced with new bolts (6K282).

NOTE: If equipped with cast iron timing chain tensioner.

Remove the bolts and the timing chain tensioner.

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NOTE: If equipped with aluminum timing chain tensioner.

Remove the bolts and the timing chain tensioner.

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- Remove the timing chain and the timing chain tensioner arm.
- Remove the bolts and the timing chain guide.

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