Shown on engine 471.9 |
1 | Camshaft bearing bridges |
2 | Camshaft housing |
3 | Intake camshaft |
4 | Exhaust camshaft |
5 | Gearwheels |
6 | Template |
W05.20-1040-12
Caution | Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil | Wear protective gloves, protective clothing and safety glasses. | |
Topical note | Notes on avoiding damage through contamination and foreign objects | ||
| Remove | ||
1 | Remove cylinder head cover. | ||
2.1 | Remove intermediate frame under cylinder head cover. | Engine 470.9 up to engine end number 222433, 471.9 up to engine end number 124618 | |
2.2 | Remove wiring harness of the fuel injectors. | Engine 470.9 as of engine end number 222434, engine 471.9 as of engine end number 124619, | |
3 | Mount turning device onto timing case. | ||
Bolt, turning device to timing case | |||
Turning device | |||
4 | Set engine to ignition TDC on cylinder 1 and engage. | ||
| Gearwheel drive modified | ||
Up to engine end number 206646 | |||
From engine end number 206647 | |||
The ignition TDC setting or locking must not be altered during removal/installation of the intake camshaft (3) or exhaust camshaft (4). | |||
Drift | |||
Bis Motorendnummer 206646 | |||
Ab Motorendnummer 206647 | |||
Turning device | |||
5 | Remove rocker arm assembly. | Intake rocker arm assembly | |
Exhaust rocker arm assembly | |||
6 | Mark installation location of camshaft bearing bridges (1). | ||
7 | First loosen screws for the camshaft bearing bridges (1) in reverse order of the tightening procedure and then remove. | Tightening procedure | |
8 | Remove camshaft bearing bridges (1). | ||
9 | Remove intake camshaft (3) or exhaust camshaft (4). | ||
| Check | ||
10 | Perform a visual check to check the camshaft housing (2) and camshaft bearing bridges (1) for wear, score marks or scratches. | If obvious wear, score marks or scratches are visible: | |
| |||
Replace camshaft housing (2) with the camshaft bearing bridges (1). | |||
11 | Perform a visual check to check the contact surfaces of the intake camshaft (3) and exhaust camshaft (4) for wear, score marks or scratches. | If obvious wear, score marks or scratches are visible: | |
| |||
Replace intake camshaft (3) and/or exhaust camshaft (4). | |||
| Install | ||
12 | Install intake camshaft (3) and exhaust camshaft (4). | | |
The markings on the gears (5) must match with the markings on the template (6). | |||
Bis Motorendnummer 206646 | |||
Ab Motorendnummer 206647 | |||
13 | Install camshaft bearing bridges (1). | Observe the installation position of the camshaft bearing bridges (1). | |
14 | Tighten screws for camshaft bearing bridges (1) according to the tightening procedure. | Tightening procedure | |
Bolt, camshaft case with rocker arm bracket to cylinder head | |||
15 | Install rocker arm assembly. | Intake rocker arm assembly | |
Exhaust rocker arm assembly | |||
16 | Remove the cranking device from the timing case. | ||
Screw/bolt, cap of TDC inspection hole to timing case | |||
17 | Pull out the drift from the timing case. | Drift | |
18 | Install crankshaft position sensor with new sealing ring and tighten screw. | Bolt, crankshaft position sensor to timing case | |
19 | Remove template (6). | ||
20.1 | Install intermediate frame under cylinder head cover. | Engine 470.9 up to engine end number 222433, 471.9 up to engine end number 124618 | |
20.2 | Install wiring harness for fuel injectors. | Engine 470.9 as of engine end number 222434, engine 471.9 as of engine end number 124619, | |
21 | Install cylinder head cover. |
904 589 04 63 00
Turning device
470 589 06 23 00
Template
470 589 03 23 00
Template
470 589 00 15 00
Drift