Crankshaft Thrust Play

Measure this play with crankshaft set in cylinder block in the normal manner, that is, with thrust bearing and journal bearing caps installed. Tighten crankcase bolts gradually as follows.

1. Tighten crankcase bolts (10 mm (0.39 in.) thread diameter) to 42 N. m (4.2 kg-m, 30.5 lb-ft) according to numerical order in figure.
2. Loosen all bolts until tightening torque is reduced to 0 in reverse order of tightening.
3. In the same manner as Step  1, tighten them to 42 N. m (4.2 kg-m, 30.5 lb-ft).
4. In the same manner as Step  1 again tighten them to specified torque.
5. Tighten crankcase bolts (8 mm (0.31 in.) thread diameter) to specified torque.

Tightening torque 

Crankcase bolt (a):  Tighten 42 N. m (4.2 kg-m, 30.5 lb-ft), 0 N. m (0 kg-m, 0 lb-ft), 42 N. m (4.2 kg-m, 30.5 lb-ft) and 60 N. m (6.0 kg-m, 43.5 lb-ft) by the specified procedure (10 mm (0.39 in.) thread diameter)

Crankcase bolt (b):  Tighten 27 N. m (2.7 kg-m, 19.5 lb-ft) by the specified procedure (8 mm (0.31 in.) thread diameter)

Fig 1: Identifying Crankcase Bolts & Torque Sequence

Courtesy of SUZUKI OF AMERICA CORP.

Use a dial gauge to read displacement in axial (thrust) direction of crankshaft.

If its limit is exceeded, replace thrust bearing with new standard one or oversize one to obtain standard thrust play.

Crankshaft thrust play 

Standard:  0.1 - 0.35 mm (0.0039 - 0.0138 in.)

Limit:  0.38 mm (0.0150 in.)

Fig 2: Measuring Crankshaft Thrust Play

Courtesy of SUZUKI OF AMERICA CORP.

Thickness of crankshaft thrust bearing 

Standard:  2.500 mm (0.984 in.)

Oversize (0.125 mm (0.0049 in.)):  2.563 mm (0.1009 in.)

Fig 3: Locating Crankshaft Thrust Bearing

Courtesy of SUZUKI OF AMERICA CORP.