Fitting Bearings; Measurement Of Connecting Rod Bearing Clearance; Bearing Oil Clearance; Main Bearing Undersize - Datsun 620 Series 1977 Service Manual

Fig
EM 68
P14stigage
Note
Do not
tum
crankshaft while
plastigage
is
being
inserted
5 Remove cap
and compare width
of the
plastigage at
its
widest
part
with
the scale
printed
in plastigage
enve
lope
Fig EM 69
Measuring bearing
clearance
MEASUREMENT
OF
CONNECTING
ROD
BEARING
CLEARANCE
I
Measure
connecting
rod bearing
clearance in the
same manner as
above
Tightening
torque
4 5 to 5 5
kg
m
33 to 40 ft lb
Engine
Mechanical
Bearing
011 clearance
Standard
Wear limit
Main
bearing
clearance
mm
in
0 020 to
0 062
0 0008 to
00024
0 12 0 0047
Connecting rod
bearing
clearance
mm
in
0 025
to
0 0 55
0 0010 to
00022
0
12 0 0047
2 If clearance
exceeds
specified
value
replace bearing with
an
under
size
bearing
and
grind
crankshaft
jour
nal
adequately
FiniNG BEARINGS
Bearings
are
manufactured with
crush
to
make
bearing
snug
down into
its
bore
To
measure
this proceed
as
follows
I
Set
main
bearing
in main bearing
cap
recess
or
cylinder
block
bearing
recess
correctly
2 Lock
one
side of
bearing
and
press
other side until bearing back
surface touches the
recess
Bearing crush
All
main
bearings
mm
in
All connecting rod
bearings
mm
in
4
Handle connecting rod bearing
in
3 Then
measure
bearing
crush H
with
a
feeler gauge See
Figure EM 70
The standard bearing
crush value is
listed below
Weight
H
Fig
EM 70 Checking bearing
crum
o
to
0 03 0 to 0 0012
0015
to
0 045 0 0006
to
0 0018
the
same manner as
above
Main
bearing
undersize
Unit
mm
in
Bearing top
thickness
Crank
journal diameter
1
827 to 1835
59 942
to
59 955
SID
00719
to
0 0722
2
3599
to 2
3604
0 25 00098
1952
to 1960
59 692
to
59 705
Undersize 0 0769
to
0 0772 2 3501
to
2 3 506
0 5 0 0 0197
2 077
to
2 085 59442
to
59 455
Undersize 0 0818 to 0 0821 2 3402 to 2 3407
0 75 00295
2 202
to
2 210
59 192 to
59 205
Undersize
00867
to
0 0870
2 3 304 to 2
3309
EM 18