Remove/Install Left Fuel Rail With Fuel Injectors - AR07.03-P-1050MNG
Engine 177 in Model 253
| 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. | AS00.00-Z-0005-01A | |
| Risk of explosion caused by fuel igniting. Risk of injury to skin and eyes caused by fuel spraying out at high pressure | Keep all ignition sources out of hazard area. Do not carry out any work on system when it is pressurized. | AS07.16-Z-0001-01A | |
| Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contact with fuel. | No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. Wear protective clothing when handling fuel. |
AS47.00-Z-0001-01A | |
| Risk of injury. Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| Risk of injury caused by scraping or cutting body parts on sharp Vehicle parts | Always wear protective gloves when working on or near sharp and non-deburred Vehicle parts. Deburr repair panels. | AS00.00-Z-0017-01A | |
| 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. Do not fill engine oil into beverage containers. |
AS18.00-Z-0001-01A | |
| Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | ||
| General information on work on gasoline direct injection system | AH07.00-P-2000-01A | ||
| Remove | |||
| 1 | Remove high-pressure line on left | AR07.03-P-1001MNG | |
| 2 | Release and disconnect electrical connector on left fuel pressure and temperature sensor (B42/2) | ||
| 3 | Remove the bracket (1) of the cylinder head cover, and remove the engine wiring harness with connected lines from the working area | ||
| 4 | Release and disconnect electrical connections of fuel injector cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) | ||
| 5 | Remove the bracket (10) between rail (4) and fuel injector cylinder 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) | ||
| 6 | Mark fuel injector cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) for the cylinder in question | When reusing fuel injector cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8). | |
| 7 | Unscrew screws/bolts (3) on rail (4) | Otherwise, damage to rail (4) occurs. |
|
| 8 | Remove rail (4) of fuel injector cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) and seal openings with suitable stop plugs | Figure | |
| 9 | Remove fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) from the cylinder head and seal injector well bores with suitable stop plugs | AR07.03-P-0004-03MM | |
| Figure | |||
| Fig 3 | |||
| 10 | Check fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) for external damage and replace if necessary | When reusing the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8). | |
| Install | |||
| 11 | Clean fuel ports on the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) | Otherwise, the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) will fail. Leaks can occur otherwise. Assembly cleaner |
*BR00.45-Z-1028-04A |
| 12 | Replace sealing packages for fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) on rail (4) | AR07.03-P-0004-02MM | |
| Assembly cleaner | *BR00.45-Z-1028-04A | ||
| Figure | |||
| 13 | Replace the sealing rings (11, 12) on the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) | ||
| 14 | Replace the sealing rings (13) on the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) | AR07.03-P-0004-01MM | |
| Assembly cleaner | *BR00.45-Z-1028-04A | ||
| Figure | |||
| 15 | Install fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) into the rail (4) and secure them with new brackets (10) | Engine damage will occur otherwise. |
|
| 16 | Read off and note injector injection quantity adjustment coding on the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) | When replacing the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8). | |
| 17 | Insert rail (4) with the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) into the left-hand cylinder head | ||
| 18 | Tighten screws/bolts (3) on rail (4) | Otherwise, damage to rail (4) occurs. |
*BA07.52-P-1001-01J |
| 19 | Install new left fuel pressure and temperature sensor (B42/2) on rail (4) | On replacing rail (4). | AR07.04-P-0201MNG |
| 20 | Connect electrical connections on the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8) until they lock | ||
| 21 | Attach the engine wiring harness with the brackets (1) on the left-hand cylinder head, and connect the electrical connections on the left-hand fuel pressure and temperature sensor (B42/2) until it locks | ||
| 22 | Install high-pressure line on left | AR07.03-P-1001MNG | |
| 23 | Read out and erase fault memory using the diagnostic system | AD00.00-P-2000-04B | |
| 24 | Store injector injection quantity adjustment coding in engine management control unit | When replacing the fuel injectors of cylinders 5 to 8 (Y76/5, Y76/6, Y76/7, Y76/8). | |
| AD00.00-P-2000-04B | |||
| 25 | Check fuel high-pressure circuit for leaktightness | AR07.03-P-1010-04MM | |
| AD00.00-P-2000-04B | |||
| 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. | AS00.00-Z-0005-01A | |
| 26 | Perform an engine test run and check engine for proper operation and leaktightness |
FUEL DISTRIBUTOR
| Number | Designation | Engine 177 | |
|---|---|---|---|
| BA07.52-P-1001-01J | Bolt, fuel distributor to cylinder head cover | Nm | 9 |
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1028-04A | Assembly cleaner | Adolf Wurth GmbH & Co. KG |