Crankshaft Balancer Unit Assembly Replace Opel Antara I



Crankshaft Balancer Unit Assembly Replace

Remove

1. Remove the oil pan. Refer to Oil Pan Replace .
2. Remove the oil suction pipe with O-ring.
3. Remove the oil pan scraper.

4. Remove the crankshaft balancer unit assembly retaining bolts.
5. Remove the crankshaft balancer unit assembly and the shim.

Adjust

1. Align the mark on the crankshaft gear with the notch at the bottom of the rear timing belt cover.

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

3. Screw measuring device KM-949 (3) with long knurled bolt (1) into 1st balancer shaft (intake side) and hand-tighten. The measuring arm (5) must point in "9 o'clock" direction shown in the illustration.
4. Install the dial gauge holder with dial gauge (4) on the cylinder block.

5. Place pre-tensioned probe (6) of gauge on measuring arm of measuring device KM-949. The probe must be set precisely between the notch marks, square to the plane surface (7).

6. Determine the left and right stops by turning the knurled bolt (2).
7. Set the dial of the gauge to zero.
8. 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.
9. The permissible tooth backlash is 0.02 mm to 0.06 mm (0.0008 to 0.0024 in.).

10. 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".

11. Then loosen the knurled bolt (3) fix the measuring arm at "9 o’clock" again and repeat the measurement.
12. 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 in.), the tooth backlash must be adjusted.

13. Remove the balancer unit from the cylinder block/crankshaft bearing caps and remove with the 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 in.).

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

Important: Only one balancer piece may be installed.

Install

Important: Before installing the balancer shaft unit assembly, perform the adjustment procedure for the proper operation.

Important: Take care not to chip or dent teeth when meshing gear sets on assembly.

1. Align the mark on the crankshaft gear with the notch at the bottom of the rear timing belt cover.

2. Turn the balancer shaft until the flattened side (arrows) of both balancer shafts face downward (oil pan side) and are on a horizontal line.

3. Install the selected balancer piece with the balancer shaft unit to the cylinder block.
4. Install the crankshaft balancer shaft unit assembly retaining bolts.

Tighten

Tighten the crankshaft balancer shaft unit assembly retaining bolts to 20 N•m (15 lb-ft) and turn the bolts another 45° using the angular torque gauge KM-470-B.

Note: If the balancer shaft unit has to be replaced, use the thickest balancer piece with the code "85" for the initial installation to ensure a tooth backlash in any case.

5. Install the oil pan scraper.

Tighten

Tighten the oil pan scraper retaining bolts to 8 N•m (71 lb-in.).

6. Install the oil suction pipe with the new O-ring.

Tighten

Tighten the oil suction pipe retaining bolts to 8 N•m (71 lb-in.).

7. Install the oil pan. Refer to Oil Pan Replace .