Balance Shaft: Adjustments

ADJUSTMENT





1. Turn crankshaft in engine rotational direction to alignment mark (2) 1st cylinder "TDC".





2. In this crankshaft position, the flattened side (arrows) of both balancer shafts must face downward and must be on a horizontal line.





3. Screw measuring device J-43038 (3) with long knurled bolt (1) into 1st balancer shaft (intake side) and tighter hard-tight measuring arm (5) must point in "9 o'clock" direction shown in this illustration.
Install dial gauge holder with dial gauge (4) on cylinder block.





4. Place pre tensioned probe (6) of gauge on measuring arm of measuring device J-43038. The probe must be set precisely between the notch marks, square to the plane surface (7).





5. Determine the left and right stops by turning the knurled bolt (2).
Set the dial of the gauge to zero.
Use the knurled bolt (2) to move the 2nd balancer shaft (exhaust side) back and forth. Again - simultaneously read off the tooth backlash from the gauge.
The permissible tooth backlash is: 0.02 mm to 0.06 mm (0.0008 to 0.0024 inch).





6. The tooth backlash must be measured in 4 different positions - turn the crankshaft further at the fastening bolt of the timing belt drive gear by 45° in the engine rotational direction until the measuring arm (2) is at "6 o'clock".





7. Then loosen the knurled bolt (3) fix the measuring arm at "9 o'clock" again and repeat the measurement.
8. If the value determined in one of the 4 measurements lies outside the tolerance 0.02 mm to 0.06 mm (0.0008 to 0.0024 inch), the tooth backlash must be adjusted.





9. Remove balance unit from cylinder block/crankshaft bearing caps and remove with balancer piece. The balancer piece has a number (code), for easy assignment. The tooth backlash can be adjusted by using a balancer piece with a different thickness.

NOTE: The next larger or smaller balancer alters the tooth backlash by 0.02 mm (0.0008 inch).

Example of selection of balancer piece: The installed balancer piece with the code "70" gave a tooth backlash of 0.08 mm (0.0031 inch).
If a balancer piece with the code "67" is now installed, the tooth backlash will be approximately 0.06 mm (0.0024 inch).

CAUTION: Only one balancer piece may be installed.