Camshaft And Sprocket; Flywheel Inspection; Engine Assembling; Assembling The Cylinder Head/Piston And Connecting Rods - Datsun 510 series Workshop Manual

reading Slacken
one
of the cap bolts and check the clearance
between the cap and cylinder block with
a
feeler gauge See
Fig
A 29
The
bearing
crush
nip
should be between 0 0 03mm
0 0 0012 in if this is not the
case
then the
bearing
must be
replaced
beck the connecting rod bearings in
a
similar
manner
after
tightening
the caps to
the specified torque readings The
bearing
clearance should be between 0 15 0 045
mm
0 0006
0 0018 in
CAMSIIAFf AND SPROCKET
Inspect
the camshaftjoumals for signs of
wear or
damage
and check the camshaft for
run
out
using
a
dial gauge in
a
similar
manner
to
that
previously
described for the crankshaft
The
bending
limit of 0 02
mm
0 0007 in
must not
be
exceeded
Install the camshaft
sprocket
mount the
assembly
in V
blocks
as
shown in
Fig
A 30 and check that the
run out
of
the sprocket does
not
exceed 0 1
mOl
0 04331 in O1eck the
timing
chain and sprocket
to
ensure
that the chain is
not
stretched
or
damaged
or
the teeth of the
sprocket damaged
or
distorted A timing chain which has become stretched will
affect the valve timing and be noisy in operation Check the
chain tensioner and chain guides for
wear
and damage replacing
the
parts
if
necessary
Replace
the
sprocket
if the
run out
is exceeded
or
if the
teeth of the
sprocket
are worn or
damaged in any way
The camshaft end play should be within 0 08 0 3 8
mm
0 0031 O o I50 in If the clearance limit of 0 1
mm
0 0039 in is exceeded it will be
necessary to
replace
the
cam
shaft locating plate See Fig A 3l
FLYWHEEL
Inspecting
Ensure that the clutch disc
contact
face of the
flywheel
is
not
worn or
damaged The
run out
of the flywheel
contact
face
should
not
exceed 0 2
mOl
0 008 in when measured with
a
dial gauge
The
flywheel ring
gear can
be
replaced
if the teeth
are
damaged
or worn
This
operation
will entail
splitting
the
ring
gear
to
remove
it A hacksaw should be used
to cut
between the
teeth followed by splitting with
a
cold chisel
When
replacing
the
ring
gear it
must
be heated to
a
temperature
of
approximately
1800 2000 F before
fitting
and then allowed
to
cool slowly
ENGINE
Assembling
Before starting
to
assemble the engine make
sure
that all
components
are
perfectly
clean It is always advisable
to
pay
particular
attention
to
the
following points
when
assembling
an
engine Keep the work bench and tools clean and make
sure
that the tools
are
to
hand Ensure that all engine oil
ways
are
clear of
foreign
matter
fit
new gaskets
and oil seals
throughout
All
sliding parts
such
as
bearing
shells
must
be smeared with
engine oil
before installing
B
Ensure that the
specified tightening torque readings
are
strictly
followed
A
mbling
the
cylinder
Head
To install the valves and valve springs place the valve
spring
seats
into position
and fit the valve guides and oil lip
seals
Assemble in the
following
order valve
springs spring
retainers valve collets and valve rocker guides
Use the
special
compressor ST 12070000
as
shown in
Fig A 32
to
compress the valve
springs
Piston and
connecting
rods
The piston piston pins and connectiJ1
rods
must
be
assembled in accordance with the cylinder numbers
The
gudgeon pin
is press fitted
to
the
connecting
rod and
requires
a
fitting force from 0 5
to
1 5
tons
This
operation
will
require
the
use
of the special tool ST 1303000
as
shown in
Fig
A 3 3
Apply engine
oil
to
the
gudgeon pin and connecting
rod before
fitting
It should be noted that the oil jet of the connecting rod big
end must
face towards the right hand side of the cylinder block
See
Fig
A 34
Fit the piston rings
the oil control
ring
in the bottom
groove followed by the centre and top compression rings
which
must
be installed with the marks facing upwards
Install the connecting rod
bearings
and caps
making
sure
that the markings
coincide Ensure that the backs of the
bearing
shells
are
perfectly clean otherwise they will be
damaged when
tightened
Assembling the
engine
Fit the baffle
plate
and
cylinder
block
net
Install the
crankcase halves of the main bearing shells the flanged shell
is fitted
to the centre
bearing
Smear the
bearing surfaces with
engine
oil and
carefully
lower the crankshaft into
position
Install the main bearing caps with their shells making
sure
that the
arrow on
the caps faces
to
the front of the
engine
Rotate the crankshaft
to
settle the caps and tighten the bearing
cap bolts
gradually
in
two
or
three
separate stages
Work out
wards from the
centre bearing
and
finally tighten to
the
specified torque reading of 4 5 5 5 kgm 32 40
Ib ft in the
sequence shown in Fig A 3 5 Ensure that the crankshaft
rotates
freely
after
finally tightening
the cap bolts Check the crankshaft
end float which should be between 0 05 0 18
mm
0 002
0 0071 in
see
Fig
A 36 Smear the side oil seals with sealant
and fit them into the
rear
main bearing cap I n st a l l the
rear
oil
seal
using
a
suitable drift and grease the lip of the seal
Place the
flywheel
in position
and install the lock washers
and
retaining
baits
Tighten the bolts evenly
to
a torque
reading
of 14 16
kgm 101
106Ib ft
Rotate the engine by
a quarter
turn
and install the piston
15