Crankshaft Main (Journal) Bearings; Out-Of-Round And Taper (Uneven Wear); Upper Half Of Bearing Installation - Suzuki Samurai 1986 Service Manual

Fig. 3-5-40 Measuring thrust play of crankshaft

Out-of-round and taper (uneven wear):

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An unevenly worn crankshaft journal shows
up as a difference in diameter at a cross
section or along its length (or both). This
difference, if any, is to be determined from
micrometer readings.
If any of journals is badly damaged or if the
amount of uneven wear in the sense explained
above exceeds its limit, regrind or replace the
crankshaft.
Limit on out-of-round
and taper
Fig. 3-5-4 1 Checking uneven wear
3-30
0.01 mm (0.0004 in.)

Crankshaft Main (Journal) Bearings

General informations:
Service main bearings are available in standard-
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size and 0.25 mm (0.0098 in) undersize, and
each of them has 5 kinds of bearings differ-
ing in tolerance.
The upper half of bearing has oil groove as
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indicated in Fig. 3~5-42. Install this half with
oil groove to cylinder block.
Fig. 3-5-42 Upper half of bearing installation
On each main bearing cap, arrow mark and
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number are embossed as indicated in Fig.
3-5-43.
When installing each bearing cap to cylinder
block, point arrow mark toward crankshaft
pulley side and install each cap from crank-
shaft pulley side to flywheel side in ascending
order of numbers @,a, 0, @ and 0. Tigh-
ten cap bolts to specified torque.
2. Flywheel side
Fig. 3-5-43 Bearing caps ins talla tion
1. Cylinder block
2. Upper half of bearing
3.
Oil groove