Replacing PTFE sealing ring

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2014 BMW Alpina B7L, 2014 BMW Alpina B7, and 2013 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

Before replacing PTFE sealing ring (1), make sure hands and work surface are clean and free of oil.

Avoid mechanical contact with injector tip (2).

Fig 1: Identifying PTFE Sealing Ring And Injector Tip

Courtesy of BMW OF NORTH AMERICA, INC.

Remove PTFE sealing ring (1) with special tool 13 0 191 from injector (2).

Use a fluff-free cloth only to remove combustion residues from cylindrical part of injector tip (do not use ultrasound or other tools/agents).

Do not clean injector tip.

Fig 2: Removing PTFE Sealing Ring From Injector Using Special Tool (13 0 191)

Courtesy of BMW OF NORTH AMERICA, INC.

Slide new PTFE sealing ring (1) onto mounting taper 13 0 195.

Fig 3: Identifying PTFE Sealing Ring Onto Mounting Taper 13 0 195

Courtesy of BMW OF NORTH AMERICA, INC.

Use fingers and mounting taper 13 0 195 to slide PTFE sealing ring (1) onto injector (2).

NOTE:

Do not use fingernails to slide PTFE sealing ring on.
Do not use any lubricating agents.
The sealing ring is expanded when slid on.

Fig 4: Sliding PTFE Sealing Ring Onto Injector Using Mounting Taper (13 0 195)
Courtesy of BMW OF NORTH AMERICA, INC.

To bring the expanded PTFE sealing ring to its installation dimension, slide three mounting sleeves with decreasing diameters onto the injector.

Slide mounting sleeve (1) with large opening first onto injector (1).

Do not use any lubricating agents.

Fig 5: Sliding Mounting Sleeve Onto Injector

Courtesy of BMW OF NORTH AMERICA, INC.

First slide mounting sleeve 13 0 192 (large diameter) onto injector (1).

Then slide mounting sleeve 13 0 193 (medium diameter) onto injector (1).

Fig 6: Sliding Mounting Sleeve 13 0 192 (Large Diameter) Onto Injector

Courtesy of BMW OF NORTH AMERICA, INC.

Finally, press injector (1) into mounting sleeve 13 0 194 (small diameter).

Installation:

Install injector within 10 minutes or slide on protective cap (Figure) (PTFE sealing ring swells up).

Fig 7: Identifying Injector Into Mounting Sleeve 13 0 194 (Small Diameter)

Courtesy of BMW OF NORTH AMERICA, INC.