Fuel Rail: Service and Repair

13 53 240 - Replacing complete injection pipe (N62, N62TU)





Special tools required:
- 13 5 281





Necessary preliminary tasks:
- Read out fault memory of DME control unit; if necessary, work through test schedules
- Switch off ignition
- Remove acoustic cover
- E65 only:
Remove design cover Service and Repair
- Remove ignition coil covers





Unlock plugs (1) on servomotors and disconnect.
Detach plug connections (2) of knock sensors from cable strips.
Unclip cable (3).





Unlock and disconnect following plug connections.
- Fuel rail, left and right, on cable duct
- Throttle-valve assembly
- All solenoid valves
- Both temperature sensors
- Oil-pressure switch
- Tank venting valve
- Alternator
- Differential pressure sensor
- Servomotor on intake air manifold
- Pulse generator on left exhaust and inlet camshafts
- Left eccentric shaft sensor





Unfasten screws.
Remove brackets (4), place cable ducts to one side.





Recycling
Fuel escapes when fuel line is detached. Catch and dispose of escaping fuel.
Observe country-specific waste-disposal regulations.





Remove protective cap from compressed air connection (1).
Blow fuel back into tank with a short blast of compressed air (max. 3 bar) at compressed air connection (1).
Unfasten screws.
Remove both injection pipes (2) towards top.





Unlock and disconnect fuel hose (1).





Seal fuel hose with special tool 13 5 281.





Unfasten screws.
Unlock connector and remove.





Lever out retainers (1).
Pull fuel injectors out of injection pipe.

Installation Note:
Replace sealing rings on fuel injectors and coat with anti-friction agent.





Note:
Now clear the fault memory.