16 11 130 Checking filler cap pressure relief valve

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

13 3 010
16 1 171
16 1 172

See FUEL SYSTEM - SPECIAL TOOLS (N51, N52K) .

See FUEL SUPPLY SYSTEM - SPECIAL TOOLS (N51, N52K) .

Set pressure regulator on special tool 16 1 171 fully in "-" direction.

Connect special tool 16 1 171 via compressed air line (1) to workshop/garage compressed air system (8... 10 bar).

Connect pressure sensor (2) from Diagnosis and Information System.

Fig 1: Identifying Pressure Sensor With Special Tool (16 1 171)

Courtesy of BMW OF NORTH AMERICA, INC.

Connect special tool 16 1 172 to fast-release coupling of special tool 16 1 171.

Install fuel tank cap on special tool 16 1 172 (3).

Fig 2: Identifying Special Tool (16 1 172 And 16 1 173)

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Only the absolute pressure is indicated in the display of the Diagnosis and Information System (DIS). The current ambient air pressure is already displayed without additional pressurization.

Check testing equipment for leaks!

Select "Measurement/Pressure" function on Diagnosis and Information System (DIS).

Increase pressure by 0.2 bar with pressure regulator on special tool 16 1 171.

Using special tool 13 3 010 , disconnect supply line from special tool 16 1 171.

Read off and note down pressure.

Wait 60 secs.

Read off pressure again and compare with starting pressure value.

Measurement evaluation:

MEASUREMENT EVALUATION

Pressure drop > 0.012 bar

Testing equipment leaking.
Check connection points for leaks.

Check filler cap pressure relief!