13 53 170 Replacing All Pressure Lines

13 53 170 Removing And Installing/Replacing All Pressure Lines (N63 Hybrid)

Special tools required:







WARNING: High-voltage system - danger to life.







WARNING:
The following points must be strictly observed prior to starting work:
- Disconnect high-voltage system from power
- Observe safety information for handling hybrid cars







WARNING;
Electric fuel pump starts up automatically when door is opened.
Observe warning on cylinder head cover.
Disconnect battery negative terminal (risk of fire due to short-circuiting on removal).







WARNING:
Carry out installation work on fuel system only with coolant temperature below 40 °C.
Wear full face guard and protective gloves.
Fuel can emerge spontaneously at high velocity when the high-pressure line is released.







IMPORTANT:
Adhere to conditions of absolute cleanliness when working on the high-pressure fuel system.
Introduced contaminants can cause malfunctions in the system.
- Do not allow any dirt particles or foreign bodies to get into the system.
- Remove all traces of dirt before removing pipes or individual components.
- Use only fluff-free cloths.
- Seal all fuel system openings with protective caps or plugs 32 1 270.
- High-pressure lines may be rescrewed a maximum of 10 times.







Recycling:
Fuel escapes when fuel lines are detached.
Catch and dispose of escaping fuel in a suitable container.
Observe country-specific waste disposal regulations.







Necessary preliminary tasks:
- Remove ignition coils
- Remove coolant pipe from cylinder head cover on left
- Partially release wiring harness for engine
- Partially remove wiring harness for injectors.
- Detach battery positive lead from battery positive support point.
- Remove coolant expansion tank
- Remove water valve for heating and air-conditioning unit
- Detach tank vent line from tank venting valve and point of separation.
- Remove lower section of steering shaft
- Clamp off and fuel feed line and remove plug.

NOTE:
- Ignition coils must not be fouled by fuel.
The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail.Cloths/rags must therefore be used to prevent fuel from getting into the spark plug slots.

- Before installing ignition coils, clean spark plug slots with compressed air.
- Make sure the spark plug slot is absolutely clean.







Removing high-pressure fuel line from injector to rail

NOTE: The following description applies to all pressure lines.

Secure injector against twisting with wrench (2).
Release union nut (1).

IMPORTANT:
If several pressure lines are removed, ensure that each pressure line is reinstalled in its original location (cylinder).
Mark pressure lines.







Release union nuts (1).
Disconnect pressure line (2).
Set down pressure lines in order.







Installation:
Only if injector has to be rotated in fitted position:
- Release bolt a few turns until holding-down element (3) is slackened.
- Turn injector (1) in direction of arrow until nuts (2) on pressure line can be easily screwed on by hand.
- To do so, engage wrench on hexagon head of injector if necessary.
- Tighten union nuts on pressure line hand-tight.

IMPORTANT:
Do not under any circumstances pull injector out of bore.
If the injector is pulled out of the bore hole, the PTFE sealing ring must be replaced. Replacing PTFE sealing ring, refer to 13 53 310.







Adhere to tightening sequence:
- First tighten down union nut on injector.
- Then tighten down union nut on rail.

Tighten high-pressure fuel lines with special tool 13 0 160.

Tighten high-pressure fuel line on injector with torque wrench (2) and special tool (1) 13 0 161. In so doing, grip hexagon head of injector with wrench (3).

Tighten down nuts with special tool 113 0 161.

Tightening torque 13 53 2AZ.







Tighten down pressure line on rail with torque wrench (1) and special tools (2) 00 1 440, (3) 13 0 162 and (4) 13 0 161.

Tightening torque 13 53 2AZ.

Installation:
When tightening high-pressure line on rail, note that angle of rotation of special tool 13 0 161 is limited. Re-position special tool if necessary.
Distortion of torque possible.







Remove high-pressure line from high-pressure pump to rail.
Picture describes the left side, the procedure for the right side is identical.
Release union nuts (1).
Disconnect pressure line (2).







Refit high-pressure line from high-pressure pump to rail.
Tighten down pressure line (1) hand-tight on rail and injector.
First tighten down pressure line (1) on high-pressure pump to torque (2) and with crowfoot wrench (3).
Tightening torque 13 53 3AZ.







Installation:
When tightening high-pressure line on rail, note that angle of rotation of special tool 13 0 140 is limited. Re-position special tool if necessary.







Tighten down pressure line (1) on rail to torque (2), with long wrench socket (3) SW13 and special tool 13 0 140.
Tightening torque 13 53 3AZ.







Assemble engine.
Vent fuel system with BMW diagnosis system.
Check fuel system for leaks.
Check function of DME.