Removal And Installation: Camshafts

Special tools and workshop equipment required 

• Camshaft Bar T10068 A
• Adhesive lubricating paste.

Removing 

-- Remove camshaft timing chain from camshafts. Refer to CAMSHAFT TIMING CHAIN .

-- Remove control housing -arrows- carefully remove from camshaft sealing rings.

Fig 1: Locating Control Housing-To-Cylinder Head Bolts

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-- Remove intake camshaft -A- as follows:

Fig 2: Camshafts - Tightening Specifications And Tightening Sequence

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1. Remove bearing caps 1 and 13.
2. Remove bearing caps 3 and 11.
3. Remove bearing cap 7.
4. Loosen bearing caps 5 and 9 alternately and in diagonal sequence, and remove.

-- Remove exhaust camshaft -B- as follows:

1. Remove bearing caps 2 and 14.
2. Remove bearing caps 4 and 12.
3. Remove bearing cap 8.
4. Loosen bearing caps 6 and 10 alternately and in diagonal sequence, and remove.

-- Carefully remove camshafts and place on a clean surface.

Installing 

• Tightening specifications, refer to VALVETRAIN COMPONENT OVERVIEW , Figure.

-- Install the hydraulic adjusting elements into the cylinder head.

-- Lay roller rocker lever -1- on valve stem ends and clip in the hydraulic adjusting elements -2-.

Fig 3: Identifying Roller Cam Followers And Support Elements

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-- Oil running surfaces of both camshafts.

Fig 4: Camshaft Identification, Valve Timing

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-- Camshaft marking between the cylinder 4 and 5 cam pair:

A - Exhaust camshaft - Identification 022 - Index 101

B - Intake camshaft - Identification 022 - Index 102

-- Install the camshafts into the cylinder head in such a way so that the cams -A- on cylinder 1 are pointing toward each other.

Fig 5: Camshaft Lobes For Cylinder Facing Each Other

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-- Bearing cap location:

• Points -arrow A- of intake and exhaust camshaft bearing caps face outwards.
  Fig 6: Identifying Points Of Intake And Exhaust Camshaft Bearing Cap Face Outwards

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• Identification on bearing caps is legible when read from intake side.

-- Coat contact surface -shaded- of bearing caps 7 and 8 with adhesive lubricating paste.

Fig 7: Coating Bearing Caps 7 And 8 Contact Surface With Adhesive Lubricating Paste

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-- Tighten camshaft bearing cap. Refer to Figure.

Fig 8: Camshafts - Tightening Specifications And Tightening Sequence

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-- Position camshafts at "TDC".

Fig 9: Identifying Camshaft Bar T10068 A Engage In Shaft Grooves

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• It must be possible to insert T10068 A into both shaft grooves.

-- If necessary, turn camshafts at hex head surfaces -arrows- to correct position using open end wrench SW 32.

Fig 10: Locating Counter-Hold Area On Camshaft

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-- Unclip screen -2- on back side of control housing -1- and clean.

Fig 11: Backside Of Control Housing & Screen

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-- Lightly lubricate camshaft sealing ring contact surface in control housing.

-- Lightly oil sealing ring contact surfaces of camshafts and carefully slide control housing over camshaft sealing rings.

-- Tighten control housing -arrows-.

Fig 12: Locating Control Housing-To-Cylinder Head Bolts

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-- Install camshaft timing chain (adjusting timing) INSTALLING (ADJUSTING VALVE TIMING) .