Shown on right cylinder head, engine 278 |
1 | Camshaft positioner |
2 | Control valve |
3 | Timing chain |
4 | Camshafts |
P05.20-2355-12
Danger ! | Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. | No parts of the body or limbs should be within the operating area when the components are moving. | |
| Remove/install | ||
1 | Rotate engine at crankshaft center bolt in direction of engine rotation to a 40°crank angle (CA) after top dead center (TDC) on cylinder 1 (ignition TDC) | ||
2 | Remove respective cylinder head cover | Left cylinder head cover | |
Right cylinder head cover | |||
3 | Mount hold-down tool on camshafts (4) | ||
Installation: Remove hold-down tool and check or set basic position of the camshaft (4). | |||
Tie-down set | |||
4 | Remove respective chain tensioner | ||
5 | Loosen control valve (2) and remove | Installation: The thread and bolt head contact surface of the control valve (2) must be oiled. The control valve (2) must be tightened down evenly without discontinuity with torque. | |
To loosen and tighten control valve (2) the camshafts (4) must be counterheld by a helper at their rear end by means of a Torx T 60. | |||
Center valve, pulse wheel/camshaft adjuster to camshaft | |||
Socket | |||
6 | Remove camshaft positioner (1) from camshaft (4) | Installation: The camshaft positioners (1) must be mixed up with each other. Apply a marking if necessary. | |
7 | Remove timing chain (3) from camshaft adjusters (1) | Installation: The right hand timing chain (3) is placed first on the camshaft adjuster (1) for the intake camshaft and then on the camshaft adjuster (1) for the exhaust camshaft. The left hand timing chain (3) is placed first on the camshaft adjuster (1) for the exhaust camshaft and then on the camshaft adjuster (1) for the intake camshaft. | |
8 | Install in the reverse order | ||
Danger ! | Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | |
9 | Perform an engine test run and check engine for functionality |
271 589 00 10 00
Socket
276 589 01 40 00
Tie-down set
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