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Suzuki SX4 Service Manual page 349

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• If necessary, regrind crankshaft journal and select undersize bearing to use with it as follows.
a. Regrind journal to the following finished diameter.
Finished journal diameter
51.7320 – 51.7500 mm (2.0367 – 2.0374 in.)
b. Using micrometer, measure regrind journal diameter.
Measurement should be taken in two directions perpendicular to each other in order to check for out-of-round.
c. Using journal diameter measured above and alphabets stamped on cylinder block, select an undersize bearing
by referring to the following table.
Check bearing clearance with newly selected undersize bearing.
New undersize crankshaft main bearing specification
Alphabets stamped
on cylinder block
Main Bearing Cap No.1 Bolt
Measure each thread diameter main bearing cap No.1
bolts (1) at "A" on 60 mm (2.36 in.) from seat side of
flange bolt and "B" on 90 mm (3.54 in.) from seat side of
flange bolt by using a micrometer (2).
Calculate difference in diameters ("A" – "B").
If it exceeds limit, replace with new one.
Main bearing cap No.1 bolt diameter measurement
"a": 60 mm (2.36 in.)
"b": 90 mm (3.54 in.)
Main bearing cap No.1 bolt diameter difference
Limit ("A" – "B"): 0.2 mm (0.008 in.)
51.7320 – 51.7379 mm
(2.0367 – 2.0369 in.)
A (1)
Red and Green
B (2)
Red and Black
C (3)
Red only
Measured journal diameter
51.7380 – 51.7439 mm
(2.0370 – 2.0371 in.)
Red and Brown
Red and Green
Red and Black
Undersize bearing to be installed
Engine Mechanical:
51.7440 – 51.7500 mm
(2.0372 – 2.0373 in.)
Red and Purple
Red and Brown
Red and Green


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