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5. Check crank case main bearing parent bore
dimensions.
6. Install new pairs of main bearing shells
according to size of crank shaft main bearing
journal diameter, making sure that securing
lugs of bearing shells are properly seated in
grooves of crank case and main bearing caps.
7.
Install main bearing caps with bearing shells in
their respective position on crank case.
Tighten main bearing cap mounting bolts in
specified sequence to specified torque.
Measure main bearing bore.
8. If main bearing parent bore dimensions are
within specified limits, proper main bearing
bore dimension is automatically achieved.
9. Loosen one of the main bearing cap mounting
bolts. Now using a feeler gauge measure the
pretension gap of main bearing shell. As the
main bearing caps are guided, the
measurement has to be done on a flat surface
and not on cylinder block.
10.Main bearing shells are precision finished and
should not be bored or scrapped.
11.Select new pair of thrust washer according to
crank shaft 4th main journal width.
12.Pretension Gap: 0.06 to 0.09mm.
Cylinder Bores :
1. Clean cylinder bores thoroughly
2. Check cylinder bore dimension, taper and
ovality.
3. If taper and ovality is found to exceed specified
limit or bore is excessively worn out then
replace the block.
4. Record the readings in Engine inspection
sheet given in this manual.