Camshaft Timing Chain, Removing And Installing: Installing

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Fig 1: Identifying Crankshaft Holder 3242

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Tightening specifications. Refer to OVERVIEW - LEFT CAMSHAFT TIMING CHAIN .
Secure crankshaft -1- in "TDC" position using Locking Pin For Crankshaft :T40237 .
The timing mechanism drive chain is installed. Refer to BALANCE SHAFT AND OIL PUMP CHAIN, REMOVING AND INSTALLING .

NOTE:

Replace the locking bolt seal for the "TDC" marking.

Replace the bolts that were tightened with an additional turn.

CAUTION:

Risk of damaging valves and piston crowns.

If camshafts are rotated, crankshaft may not rest with any piston at "TDC".

-- Check whether camshafts of both cylinder heads stand in "TDC" position.

Fig 2: Identifying Check Of Camshafts For Both Cylinder Heads In TDC Position And Adjustment Pin T40060

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It must be possible to secure the camshafts with the Camshaft Adjustment Pins:T40060 .
The pin -arrow- in the Camshaft Adjustment Pins:T40060 must be perpendicular to the center line of the camshaft on cylinder bank 1 (right).

The pin -arrow- in the Camshaft Adjustment Pins:T40060 must be perpendicular to the center line of the camshaft on cylinder bank 2 (left).

Fig 3: Identifying Perpendicular Pin -Arrow- On Adjustment Pin T40060
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-- Remove the Camshaft Adjustment Pins:T40060 from both camshafts.

Fig 4: Identifying Adapter T40061 And Adjustment Pin T40060

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CAUTION:

Risk of damaging valves and piston crowns.

If camshafts are rotated, crankshaft may not rest with any piston at "TDC".

NOTE:

If the camshafts are not secured, it is possible to correct them slightly with the Camshaft Correction Tool:T40061 by installing the camshaft chain sprocket on the camshaft.

-- Install the left camshaft timing chain with the camshaft chain sprocket, the guide rail and the tensioning rail.

Fig 5: Identifying Left Camshaft Timing Chain, Camshaft Chain Sprocket, Guide Rail And Tensioning Rail

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The slots in the camshaft chain sprocket must be at the middle position in relation to the threaded holes in the camshaft.

-- Tighten the bolts -1 and 3- for the guide rail and the tensioning rail.

-- Install both camshaft chain sprocket bolts -2- loosely.

It must still be possible to rotate the camshaft chain sprocket on the camshaft and it must not tip.

-- Secure the left camshaft with the Camshaft Adjustment Pins:T40060 .

The bolt -arrow- in the Camshaft Adjustment Pins:T40060 must be perpendicular to the center axis of the camshaft.

-- Pull the drill -4- out of the alignment hole, thereby releasing the chain tensioner.

-- Install the right camshaft timing chain with the chain sprocket and chain tensioner.

Fig 6: Identifying Drill Bit -4- And Alignment Hole

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The slots in the camshaft chain sprocket must be at the middle position in relation to the threaded holes in the camshaft.

-- Tighten the chain tensioner bolts -1-.

-- Install both camshaft chain sprocket bolts -2- loosely.

It must still be possible to rotate the camshaft chain sprocket on the camshaft and it must not tip.

-- Secure the right camshaft with the Camshaft Adjustment Pins:T40060 .

The bolt -arrow- in the Camshaft Adjustment Pins:T40060 must be perpendicular to the center axis of the camshaft.

-- Pull the drill -3- out of the alignment hole, thereby releasing the right chain tensioner.

-- Pre-tighten the right camshaft chain sprocket using the Chain Sprocket Tensioner:T40062 and torque wrench to 20 Nm in direction of -arrow- and hold the pretension.

Fig 7: Identifying Bolts -1 And 2-, Torque Wrench, Adapter T40062 And Adjustment Pin T40060

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-- Tighten the bolts -1 and 2-.

-- Remove Chain Sprocket Tensioner:T40062 and Camshaft Adjustment Pin Camshaft Adjustment Pins:T40060 .

-- Tighten the remaining bolts for the right camshaft chain sprocket.

-- Pre-tighten the left camshaft chain sprocket using the Chain Sprocket Tensioner:T40062 and torque wrench to 15 Nm in direction of the -arrow- and hold the pretension.

Fig 8: Identifying Adapter T40062 On Left Camshaft Chain Sprocket

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-- Tighten the bolts -1 and 2-.

-- Remove Chain Sprocket Tensioner:T40062 and Camshaft Adjustment Pin Camshaft Adjustment Pins:T40060 .

-- Tighten the remaining bolts for the left camshaft chain sprocket.

-- Remove the Crankshaft Holder:3242 .

Fig 9: Identifying Crankshaft Holder 3242

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Checking the Valve Timing

Fig 10: Identifying Valve Timing, Checking

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CAUTION:

Components could be damaged by the camshaft timing chain jump off.

Turn crankshaft only in direction of engine rotation -arrow-.

-- Turn the crankshaft two turns using the Crankshaft Key:T40049 until it is just in front of "TDC".

-- Lock the crankshaft -1- from turning using the Crankshaft Key:3242 to 20 Nm.

Fig 11: Identifying Crankshaft Holder 3242

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CAUTION:

An inaccurate "TDC" setting will cause an inaccurate setting.

If the crankshaft was only rotated slightly past "TDC", first rotate it back approximately 10° and then rotate it in engine rotation direction again to "TDC".

-- Check whether camshafts of both cylinder heads stand in "TDC" position.

Fig 12: Checking Camshafts TDC Position

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It must be possible to secure the camshafts with the Camshaft Adjustment Pins:T40060 .
The pin -arrow- in the Camshaft Adjustment Pins:T40060 must be perpendicular to the center line of the camshaft on cylinder bank 1 (right).

The pin -arrow- in the Camshaft Adjustment Pins:T40060 must be perpendicular to the center line of the camshaft on cylinder bank 2 (left).

Fig 13: Identifying Perpendicular Pin -Arrow- On Adjustment Pin T40060
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