Main Bearings Inspection - Suzuki Liana RH418 Supplementary Service Manual

1D-60 Engine Mechanical:
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: 0.11 – 0.31 mm (0.0044 – 0.0122 in.)
Limit: 0.35 mm (0.0138 in.)
NOTE
After checking the thrust play, make sure that
thread deformation of each bearing cap No.1
bolt according to "Bearing Cap Bolt" under

"Main Bearings Inspection".

Out-of-Round and Taper (Uneven Wear) of Journals
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 determined by
taking micrometer readings. If any one of journals is
badly damaged or if amount of uneven wear in the sense
exceeds its limit, regrind or replace crankshaft.
Limit on out-of-round and taper
0.01 mm (0.0004 in.)
Out-of-round
"A" – "B"
Taper
"a" – "b"
Main Bearings Inspection
General Information
• Service main bearings are available in standard size
and 0.25 mm (0.0098 in.) undersize, and each of them
has 5 kinds of bearings differing in tolerance.
• Upper half of bearing (1) has oil groove (2) as shown
in the figure.
Install this half with oil groove to cylinder block.
• Lower half of bearing does not have an oil groove.
Visual Inspection
Check bearings for pitting, scratches, wear or damage.
If any malcondition is found, replace both upper and
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lower halves. Never replace either half without replacing
the other half.
Main Bearing Clearance
Check clearance by using gauging plastic according to
the following procedure.
1) Remove bearing caps.
2) Clean bearings and main journals.
3) Place a piece of gauging plastic (1) to full width of
bearing (parallel to crankshaft) on journal, avoiding
oil hole.
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