Timing Drive Components: Installation
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NOTE: If the components are to be reinstalled, they must be installed into their original locations or engine damage may occur.NOTE: Camshaft shown installed to clarify camshaft roller follower position.NOTE: Lubricate the camshaft roller followers with clean engine oil prior to installation.
Install only the identified camshaft roller followers onto the RH cylinder head.
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NOTE: If the components are to be reinstalled, they must be installed into their original locations or engine damage may occur.NOTE: Camshaft shown installed to clarify camshaft roller follower position.NOTE: Lubricate the camshaft roller followers prior to installation.
Install only the identified camshaft roller followers onto the LH cylinder head.
- Install the LH and RH camshafts.
- Lubricate the camshaft and camshaft journals with clean engine oil prior to installation.
- Install the LH and RH camshaft bearing caps in their original locations.
- Lubricate the camshaft bearing caps with clean engine oil.
- Position the front camshaft bearing cap.
- Position the remaining camshaft bearing caps.
- Install the 24 bolts loosely.
- Tighten the 12 LH camshaft bearing cap bolts in 2 stages:
- Stage 1: Tighten to 8 Nm (71 lb-in) in the sequence shown in the illustration.
- Stage 2: Tighten an additional 45 degrees.
- Tighten the 12 RH camshaft bearing cap bolts in 2 stages:
- Stage 1: Tighten to 8 Nm (71 lb-in) in the sequence shown in the illustration.
- Stage 2: Tighten an additional 45 degrees.
- Install the balance shaft drive gear onto the LH camshaft.
- Install both camshaft sprockets and camshaft sprocket bolts finger-tight.
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NOTE: Timing chain procedures must be followed exactly or damage to valves and pistons will result.NOTE: Prior to installation, inspect the tensioner-sealing bead for seal integrity. If cracks, tears, separation from the tensioner body or permanent compression of the seal bead is observed, install a new tensioner or engine damage may occur.
Using a vise, compress the tensioner plunger.
- Install the Hydraulic Chain Tensioner Retaining Clip on the tensioner to hold the plunger in during installation.
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NOTE: There are 61 links in each timing chain.
If copper links are not visible, mark 2 links on one end and 1 link on the other end, and use as timing marks.
- Install the timing chain guides and the 4 bolts.
- Tighten to 10 Nm (89 lb-in).
- Preposition the camshafts in the following sequence.
- Rotate the LH camshaft until the timing mark is approximately at 12 o'clock.
- Rotate the RH camshaft until the timing mark is approximately at 11 o'clock.
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NOTE: Rotate the crankshaft counterclockwise only. Do not rotate past the position shown in the illustration or severe piston and/or valve damage can occur.
Position the crankshaft with the Crankshaft Holding Tool, then remove the tool.
- Install the crankshaft sprocket, making sure the flange faces forward.
- Install the lower end of the LH timing chain, aligning the timing marks.
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NOTE: Be sure the upper half of the timing chain is below the tensioner guide dowel.
Install the LH timing chain on the camshaft sprocket with the 2 chain (marked) links and the timing marks aligned.
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NOTE: The LH timing chain tensioner arm has a bump near the dowel hole for identification.
Position the LH timing chain tensioner arm on the dowel pin and install the LH timing chain tensioner and the 2 bolts.
- Tighten to 25 Nm (18 lb-ft).
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NOTE: Be sure the chain link and crankshaft sprocket timing marks are aligned.NOTE: The lower half of the timing chain must be positioned above the dowel.
Install the RH (outer) timing chain on the crankshaft sprocket.
- Position the timing chain on the camshaft sprocket. Make sure the 2 copper-colored (marked) links align with the camshaft sprocket timing mark.
- Position the RH timing chain tensioner arm on the dowel pin and install the RH timing chain tensioner and the 2 bolts.
- Tighten to 25 Nm (18 lb-ft).
- Remove the Hydraulic Chain Tensioner Retaining Clips from the RH and LH timing chain tensioners.
- Check for correct alignment of all timing marks.
- Install the crankshaft sensor ring on the crankshaft.
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NOTE: Only use hand tools to tighten the camshaft sprocket bolt or damage may occur to the camshaft or camshaft sprocket.
Tighten the RH camshaft sprocket bolt in 2 stages:
- Stage 1: Tighten to 40 Nm (30 lb-ft).
- Stage 2: Tighten an additional 90 degrees.
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NOTE: Only use hand tools to tighten the camshaft sprocket bolt or damage may occur to the camshaft or camshaft sprocket.
Tighten the LH camshaft sprocket bolt in 2 stages:
- Stage 1: Tighten to 40 Nm (30 lb-ft).
- Stage 2: Tighten an additional 90 degrees.
- Rotate the crankshaft clockwise and position the crankshaft keyway at the 6 o'clock position.
- Remove the 2 bolts and the middle balance shaft bearing support and camshaft bearing cap assembly.
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NOTE: If the components are to be reinstalled, they must be installed into their original locations or damage to the engine may occur.NOTE: Do not allow the valve keepers to fall off the valve or the valve may drop into the cylinder. If a valve drops into the cylinder, the cylinder head must be removed. For additional information, refer to CYLINDER HEAD .NOTE: It may be necessary to push the valve down while compressing the spring.
Using the Valve Spring Compressor, install the roller follower.
- Lubricate the camshaft roller follower with clean engine oil prior to installation.
- Position the camshaft bearing cap and install the bolts in 2 stages:
- Stage 1: Tighten to 8 Nm (71 lb-in).
- Stage 2: Tighten an additional 45 degrees.
- Remove the 2 bolts and the rear balance shaft bearing support and camshaft bearing cap assembly.
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NOTE: If the components are to be reinstalled, they must be installed into their original locations or damage to the engine may occur.NOTE: Do not allow the valve keepers to fall off the valve or the valve may drop into the cylinder. If a valve drops into the cylinder, the cylinder head must be removed. For additional information, refer to CYLINDER HEAD .NOTE: It may be necessary to push the valve down while compressing the spring.
Using the Valve Spring Compressor, install the roller follower.
- Lubricate the camshaft roller follower with clean engine oil prior to installation.
- Position the camshaft bearing cap and install the bolts in 2 stages:
- Stage 1: Tighten to 8 Nm (71 lb-in).
- Stage 2: Tighten an additional 45 degrees.
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NOTE: If the components are to be reinstalled, they must be installed into their original locations or engine damage may occur.NOTE: Do not allow the valve keepers to fall off the valve or the valve may drop into the cylinder. If a valve drops into the cylinder, the cylinder head must be removed. For additional information, refer to CYLINDER HEAD .NOTE: It may be necessary to push the valve down while compressing the spring.
Using the Valve Spring Compressor, install all of the remaining camshaft roller followers.
- Lubricate the camshaft roller followers with clean engine oil prior to installation.
- Rotate the crankshaft counterclockwise and position the crankshaft keyway at the 11 o'clock position.
- Lubricate the balance shaft journals with clean engine oil.
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NOTE: Camshaft sprocket removed from art for clarity.
Position the balance shaft on the journals and align the timing mark on the balance shaft with the camshaft timing mark as shown in the illustration.
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NOTE: The balance shaft bearing caps must be installed into their original locations or engine damage may occur.
Position the 3 balance shaft bearing caps and install the 6 bolts and tighten in the sequence shown in the illustration.
- Tighten to 10 Nm (89 lb-in).
- Install engine front cover. For additional information, refer to ENGINE FRONT COVER .