BMW 7 Series: Checking Filler Cap Pressure Relief Valve
Notes
Set pressure regulator on special tool 16 1 171 fully in "-" direction.
Connect special tool 16 1 171 using compressed air line (1) to workshop compressed air system (8... 10 bar).
Connect pressure sensor (2) from Diagnosis and Information System.
Connect special tool 16 1 172 to quick-release coupling (3).
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Fig. 9: Identifying Pressure Sensor, Air Line, Quick Release Coupling And
Special Tool
Install fuel filler cap on special tool 16 1 172.
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Fig. 10: Identifying Fuel Filler Cap With Special Tool (16 1 172)
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.
Select "Measurement/Pressure" function on Diagnosis and Information System (DIS).
Using pressure regulator on special tool 16 1 171, increase pressure by 0.2 bar.
Using special tool 13 3 010 clamp off feed line from special tool 16 1 171.
Read off and note down pressure.
Wait 60 seconds.
Read off pressure again and compare with starting pressure value.
Measurement evaluation:
PRESSURE DROP MEASUREMENT EVALUATION
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Check fuel filler cap pressure relief valve! Select "Measurement/Pressure" function on Diagnosis and Information System (DIS).
Using pressure regulator on special tool 16 1 171, increase pressure by 0.3 bar.
Using special tool 13 3 010 clamp off feed line from special tool 16 1 171.
Read off and note down pressure.
Wait 60 seconds.
Read off pressure value again and compare with starting pressure value.
Measurement evaluation:
PRESSURE DROP MEASUREMENT EVALUATION
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READ NEXT:
Removing And Installing Or Replacing Fuel Filler Pipe
(Petrol/Gasoline)
Recycling
Fuel escapes when fuel lines are detached. Have a suitable collecting
container ready.
Catch and dispose of escaping fuel.
Observe country-specific waste-disposal regulations.
IMPORTANT:
Removing And Installing/Replacing Fuel Filter With Pressure
Regulator
Recycling
Fuel escapes when fuel lines are detached. Have a suitable collecting
container ready.
Catch and dispose of escaping fuel.
Observe country-specific waste-disposal regulations.
IMPORTANT:
Removing And Installing/Replacing Fuel Tank Filler Hose
Recycling
Fuel escapes when fuel lines are detached. Have a suitable collecting
container ready. Catch and dispose of
escaping fuel.
Observe country-specific waste-disposal regulations.
IMPORTANT: E
SEE MORE:
Replacing All Valve Springs (N63)
Necessary preliminary work
Remove LEFT CYLINDER HEAD.
Remove RIGHT CYLINDER HEAD.
Remove camshafts.
Mount cylinder head (1) on special tool 11 9 000.
Fig. 292: Mounting Cylinder Head On Special Tool 11 9 000
Prepare special tool 11 9 008 on special tool 11 9 006.
Fig. 293: Preparing Special T
Oil Supply
CHECKING ENGINE OIL PRESSURE
Notes
WARNING: Risk of scalding!
NOTE: To check the engine oil pressure, remove the oil pressure switch and
install and
connect the special tool.
NOTE: A small amount of engine oil emerges when the oil pressure switch is
removed.
Have a cleaning cloth ready.
Necessary
