BMW X5: Workshop Hints On Cylinder Leakage Testing
BMW X5 (G05) 2019-2025 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.
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Fig. 4: Cylinder Leakage Testing Tips
Cylinder Arrangement And Firing Order
Front of Engine
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Fig. 5: Identifying Firing Order
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Instructions For Removing And Installing Ear Clips
Special tools required:
32 1 260
NOTE: The work steps are show on assorted components. Ear clip must
always be
replaced.
To remove an ear clip, place special tool 32 1 260 at right angles to ear and
cut ear open.
Fig. 70: Identifying Special Tool (32 2 160)
The ear clip can be fitted not only
Piston With Rings And Pin
REMOVING AND INSTALLING/REPLACING ALL PISTONS (N52K)
Special tools required:
00 9 120 TORQUE ANGLE MEASURING DIAL
11 4 491
11 4 492
11 4 493
11 4 494
11 6 241
11 6 261
11 8 330
WARNING: Danger of injury!
Carry out work on piston pin circlip wearing protective goggles only.
IMPORTANT: If pi
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