Service manual
Table Of Contents
(5) Main
bearings
Inspect each main bearing for evidence
of
wiping
or fatigue failure, for scratches by dirt particles
imbedded and for improper seating
on
the bore
(bearing cap).
On
the
basis
of
fmdings, determine
whether the bearing should be replaced
or
not.
Check each main bearing
to
be used in engine
reassembly
to
see whether
it
will provide the speci-
fied radial clearance. This can be accomplished in
this manner.
Install the main
bearinp
on
the crankcase, less the
crankshaft, securing each bearing cap by tightening
its bolts to 8.5 kg·m (61.5 lb-ft) and read the
diameter in the two directions (A) (B), in indicated
below. Mike the journal and, from these readings,
compute the radial clearance.
Specifications Unit: mm (in.)
Item
Standard
Repair
limit
Fit
of
main
bearings
on
0.03
~0.089
0.200
journals
(0.0012
~0.00350)
(0.00787)
Camshaft
(1) Check the camshaft
end
playas
outlined for the
timing gears. Where
the
end play exceeds the
repair limit, replace the thrust plate with a new
one.
Specifications
Unit: mm (in.)
Item
Nominal
Standard
Repair
value
limit
Camshaft
end
5.0
0.05 - 0.112
0.3
play
(0.197)
(0.00197 -
(0.012)
0.00441)
(2) Inspect the camshaft journals for abnormal wear
and damage; the camshaft must be replaced
if
any
of
its three journals
is
found in
bad
condition
beyond repair.
(3) Mike each cam
of
the camshaft to read 01 (cam
height) and
lh
(diameter), and compute the
difference between
01
and
01.
If
this difference
is
less than the service limit, replace the camshaft.
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32-
Measuring main bearing 10
Positions for miking main bearing