BMW X5: Workshop Hints On Cylinder Leakage Testing
BMW X5 (G05) 2019-2023 Service & Repair Manual / Engine Diagnosis / Workshop Hints On Cylinder Leakage Testing
When performing cylinder leakage tests, the following tips might be helpful: Remove all spark plugs to allow easier rotation of the engine. (If this test is done after a compression test, the plugs should already be out).
- Perform the leakage test on all cylinders, not just the problem cylinder. This would indicate any other problems which can be rectified. This eliminates any repeat repairs and wasted diagnostic time.
- Perform the leakage test in cylinder firing order starting with cylinder #1. It takes two revolutions of the engine to complete the leakage test. Start at cylinder #1 and rotate the engine to the next cylinder in the firing order. Divide the number of cylinders into 720, the result is the number of degrees that each cylinder fires. For example, if you divide a 6 cylinder into 720, this equals 120 degrees. If you start at cylinder 1 and rotate the engine 120 degrees in the direction of rotation, you can check the next cylinder in the firing order. This process eliminates the need to rotate the engine an excessive amount.
.png)
Fig. 4: Cylinder Leakage Testing Tips
Cylinder Arrangement And Firing Order
Front of Engine
.png)
Fig. 5: Identifying Firing Order
READ NEXT:
Ignition System Diagnosis
The ignition system on modern BMW engines consist of one ignition coil per
cylinder. This arrangement is
known as RZV, or Direct Stationary Ignition. The ignition coil receives fused
power usually f
Fuel System Testing
Fuel systems need to be checked for proper fuel pressure as well as
sufficient volume. When diagnosing fuel
system complaints, you must take into account the type of fuel system and how
the fuel is
Fuel Volume Testing
Some driveability concerns are related to incorrect fuel volume. Vehicles
with lack of power complaints and
mixture related fault codes may have insufficient fuel volume supplied to the
fuel injecti
SEE MORE:
BMW Gesture Control
Principle
Several iDrive functions can be operated by hand
motion using BMW Gesture Control.
Overview
The camera in the headliner detects gestures
that are carried out in the area of the center console
at the height of the Control Display.
Activate/deactivate
1. "CAR".
2. "Settings".
3. "General s
BMW Accident Assistance
Principle
BMW Group Accident Assistance can be contacted
if assistance is needed in the event of an
accident.
General information
If the vehicle sensors detect a minor to moderately
severe accident, which did not trigger any
airbags, a Check Control message appears on
the instrument cluster. In addi
© 2019-2023 Copyright www.bmwx5info.com
