Balance Shaft: Testing and Inspection

NOTE: Inspect the balancer shaft before removing the right side cover and the balancer gear case.

Front Balancer Shaft End Play:

1. Push the balancer shaft firmly away from the dial indicator, and zero the dial against the front end of the balancer shaft, then pull the balancer shaft firmly back toward the indicator.

Front Balancer Shaft End Play:
Standard (New) [1]: 0.10 - 0.35 mm (0.004 - 0.014 in)

- If end play is excessive, inspect the retainer and thrust surfaces on the balancer shaft.

Rear Balancer Shaft End Play:

Rear Balancer Shaft End Play:
Standard (New) [1]: 0.06 - 0.18 mm (0.002 - 0.007 in)

- If end play is excessive, inspect the thrust washer and thrust surfaces on the driven gear and oil pump housing.

NOTE: The thickness of the retainer (front) and thrust washer (rear) are fixed and must not be changed either by grinding or shimming.

2. Remove the balancer shafts. Refer to Cylinder Block Assembly. Service and Repair

NOTE: Clean the balancer shafts.

3. Inspect the surface of the balancer shaft journal and the balancer bearing.
4. Replace if there is wear, damage or discoloration on the surface of the bearing or the balancer shaft journal. When replacing the rear No.1 bearing be sure to replace the oil pump housing with a new one.

NOTE: A mirror-like surface is normal.

Balance Shaft Taper:

5. Measure taper at the edges of each journal.
- Taper is the difference between measurements on each journal.


Journal Taper
Standard (New) [1]: 0.005 mm (0.0002 in)

Checking Runout:

6. Measure runout on the No. 2 journal of each balancer shaft to make sure the balancer shafts are not bent.

Balancer Shaft Total Indicated Runout
Standard (New) [1]: 0.02 mm (0.001 in)

Checking Balancer Shaft Journal Diameter:

7. Measure the journal diameter of the balancer shaft.

Journal Diameter, Standard (New) [1]
No. 1, Front:
42.722 - 42.734 mm (1.6820 - 1.6824 in)
No. 1,Rear:
20.938 - 20.950 mm (0.8243 - 0.8248 in)
No. 2:
38.712 - 38.724 mm (1.5241 - 1.5246 in)
No. 3:
34.722 - 34.734 mm (1.3670 - 1.3675 in)

8. Remove the crankshaft, the pistons and the other parts from the block, then clean the balancer shaft journal bearings of the block and the oil pump housing with a clean shop towel.
9. Check the surface of the bearings. If there is wear, damage or discoloration, replace the bearings or the oil pump housing.

Measuring Inner Diameters:

Using Bore Gauge:

#1 Bearing Journal Diameter:

10. Measure the inner diameters of the balancer shaft journal bearings.

Bearing Inner Diameter Standard (New) [1]:
No. 1, Front:
42.800 - 42.820 mm (1.6850 - 1.6858 in)
No. 1, Rear:
21.000 - 21.013 mm (0.8268 - 0.8273 in)
No. 2:
38.800 - 38.820 mm (1.5276 - 1.5283 in)
No. 3:
34.800 - 34.820 mm (1.3701 - 1.3709 in)

11. Calculate the shaft-to-bearings oil clearances.

BEARING I.D. - JOURNAL O.D. = OIL CLEARANCE

Bearing-to-shaft Oil Clearance Standard [1]
No. 1 Journal Front (block)
0.066 - 0.098 mm (0.0026 - 0.0039 in)
No. 2 Journals (block):
0.076 - 0.108 mm (0.0030 - 0.0043 in)
No. 3 Journals (block)
0.066 - 0.098 mm (0.0026 - 0.0039 in)
No. 1 Journal Rear (oil pump housing):
0.050 - 0.075 mm (0.0020 - 0.0030 in)

[1] Manufacturer does not provide Service Limits for this component.