Removal Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Camshaft & Crankshaft Sprocket Timing Marks

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Remove the crankshaft position (CKP) sensor reluctor ring. Refer to Crankshaft Position Sensor Reluctor Ring Replacement .
Install a 7/16-20 x 1 inch bolt into the end of the crankshaft.

CAUTION: Align the timing marks before removing the timing chain. If it is necessary to turn either the camshaft or the crankshaft with the timing chain removed, loosen or remove the valve rocker arms. Turning either the crankshaft or camshaft with the timing chain removed may cause the pistons to contact the valves, resulting in damage.

Rotate the crankshaft until:
- The timing marks on both sprockets line up.
- The number 4 cylinder is at top dead center (TDC) of the compression stroke.

Fig 2: View Of Timing Chain Tensioner Shoe & Pin

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Unsnap the timing chain tensioner shoe from the pin (1).

Fig 3: Identifying Camshaft Sprocket Bolts

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Remove the camshaft sprocket bolts.

Fig 4: View Of Camshaft Sprocket & Camshaft Timing Chain

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Remove the camshaft sprocket and the camshaft timing chain.

Fig 5: Removing Crankshaft Sprocket Using J 5825-A

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Using J 5825-A and an open end wrench, remove the crankshaft sprocket. See Special Tools .

Fig 6: Locating Crankshaft Balancer Key

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Remove the crankshaft balancer key.

Fig 7: View Of Timing Chain Tensioner Bracket

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If necessary, remove the timing chain tensioner bracket bolt and bracket.
Clean and inspect the timing chain and sprockets, if necessary. Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection .