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Basic setting of turbo pressure regulator, 4-cyl

Basic setting of turbo pressure regulator, 4-cyl

Important

Do not make adjustments during the warranty period.


Checking and adjusting


1. Detach the vacuum unit pushrod from the control arm. Measure the travel of the arm between its end positions (bottom position against set screw). Use a vernier caliper. The travel should be between 9-12mm.

2. If the travel is correct, refit the pushrod onto the control arm.

3. Remove the vacuum hose from the pressure regulator.


4. Connect Pressure/vacuum pump 30 14 883 Pressure/vacuum pump and 83 93 514 Boost pressure gauge via a T-union.

5. Place a 0.05mm feeler gauge between the control arm and the set screw. Create a vacuum of -0.55 ± 0.02 bar. The clearance between the control arm and the set screw should be 0.05mm. With the correct clearance, the feeler gauge should move with a light resistance.


6. If it is necessary to make adjustments, release the vacuum and undo the lock nut on the diaphragm unit rod. Grip the rod to prevent it from turning or the diaphragm may be damaged.

7. Recreate a vacuum of -0.55 ±0.02 bar and insert a feeler gauge between the control arm and the set screw. Adjust the knurled nut so that the feeler gauge can be inserted with a slight resistance. Make sure to maintain the vacuum during adjustment.

8. Release the vacuum and tighten the lock nut while gripping the diaphragm unit rod with a pair of pliers.

9. Check the adjustment by recreating a vacuum of -0.55 ±0.02 bar. Measure with a feeler gauge.

10. Create a vacuum of -0.58 ±0.02 bar. The control arm should now rest against the set screw.

11. Remove the tool and connect the vacuum hose.


Checking


1. Remove the vacuum hose from the pressure regulator.


2. Connect Pressure/vacuum pump 30 14 883 Pressure/vacuum pump and 83 93 514 Boost pressure gauge via a T-union.

3. Measure the distance between the vacuum unit and the upper part of the pull rod with a vernier caliper as illustrated.


4. Create a vacuum of -0.20 bar. Measure with a vernier caliper again. The difference between the measurements (stroke) should be 0.5 - 3.5mm.

5. Create a vacuum of -0.56 bar and measure in the same way as before. The difference between the two measurements should be 9 - 12mm.

6. Remove the tool and connect the vacuum hose.