Geely JL481Q, Manual

Page: 84 / 198

Fig. 194 Measuring Oil clearance Fig.195 Mounting main bearing cap
Fig.196 Measuring Oil Film Clearance
Fig.197 Illustration of Grouping Number of
Crankshaft Journal & Bearing Shell Dimensions
NO.1
1, 2, 3, 4 and 5
Plastic oil clearance gauge
NO.2
NO.3
NO.4 NO.5
NO.1 NO.2 NO.3 NO.4 NO.5
h. Take down the main bearing cap and measure the oil
clearance in the section of largest width.
᷉
See Fig.196
᷊
Oil clearance:
Standard: 0.015-0.033mm
Enlarged size by 0.25: 0.016-0.056mm
Max. oil clearance: 0.10mm
If the oil clearance is larger than the maximum value, replace
the bearing shell. When necessary, grind or replace the
crankshaft. If the cylinder block parts are changed, the
standard clearance of bearing shell should be 0.015-
0.045mm.
If standard bearing shell is used, it is necessary to use those
with the same number. If the number of bearing shell cannot
be determined, it is possible to sum up the size numbers on
cylinder block and crankshaft and then choose the number of
bearing shell equivalent to the above sum, so as to ensure
accuracy of selection. Totally, there are 5 standard bearing
shell sizes, marked with “1”, “2”, “3”, “4” and “5” respectively
(Fig. 197, Table 7).
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