engine MITSUBISHI SPYDER 1990 Service Repair Manual

Front Case, ENGINE OVERHAUL Shaft and. Pan
Crank pulley side
8 mm bolts
Oil pan viewed from lower side
Drain pigasket
P A N .
(1) Clean both mating surfaces of and cylinder block.
(2) Apply a 4 mm in.) wide bead of to the entire
circumference of the oil pan flange.
Specified sealant:
MITSUBISHI GENUINE or
equivalent
NOTE. .
Be sure to install the oil pan quickly the sealant’
is wet (within 15 minutes);
(2) After installation, keep the sealed area
from,,
the oil and coolant for approx.
hour.
, .
(3) Note the difference in bolt lengths at the loca
tion
DRAIN PLUG GASKET INSTALLATION
Install the drain plug gasket in the direction show n in the
illustration.
OIL COOLER INSTALLATION
First insert the oil cooler projecting stopper in t he oil filter
bracket groove and then tighten the oil cooler
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Front Case,
ENGINE OVERHAUL Shaft and
Bracket side OIL FILTER INSTALLATION
(1) Clean the installation surface of the filter br acket.
(2) Apply engine oil to the O-ring of the oil filte r.
(3) Screw the oil filter in until the O-ring contacts the bracket.
Then tighten
turn [tightening torque: Nm (12
NOTE
For tighten one [Tightening torque:
14 Nm (10
after the O-ring contacts the bracket.
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Front Case, Counterbalance
ENGINE Shaft and
INSPECTION
FRONT CASE
(1) Check oil holes for clogging and if necessary.
(2)’ Check left counterbalance shaft front bearing
for
Wear, damage and seizure. If there is anything wron g’
with the section, replace the front
(3) Check the front case for cracks and other damag e.
place cracked or damaged front case.
OIL SEAL
(1) Check the oil seal lip for wear and damage. Rep lace
oil seal if necessary.
(2) Check the oil seal lip for deterioration. Repla ce oil seal
if necessary.
I
COUNTERBALANCE SHAFT
(1) Check oil holes for clogging.
(2) Check journal for seizure, damage and contact w ith bear-
ing. If there is anything wrong with the journal, replace
counterbalance shaft, bearing or front case assembl y.
OIL PUMP
(1) Assemble the oil pump gear to the front case an d rotate
it to ensure smooth rotation with no looseness.
(2) Ensure that there is no ridge wear on the conta ct surface
between the front case and the gear surface of the oil
pump cover.
(3) Check the side clearance.
Standard value: Drive gear
mm
Driven gear mm in.)
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ENGINE OVERHAUL Piston and Connecting 1
PISTON AND CONNECTING ROD
REMOVAL AND INSTALLATION
- 4
Removal steps
1. Nut Connecting rod cap 3. Connecting rod bearing 4. Piston and connecting rod assembly 5. Connecting rod bearing 6. Piston ring No. 1
7. Piston ring No. 2 8. Oil ring 9. Piston pin 10. Piston 11. Connecting rod
12. Bolt
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11 ENGINE OVERHAUL Piston and Rod
Piston pin settingtool 6941
11
Presspin
Piston pinFront mark
Connecting rod
guide pin
R E M O V A L S E R V I C E
ROD CAP
(1) Mark the cylinder number on the side of connecting
rod big end for correct reassembly.
(2) Keep the removed connecting rods, caps, ‘andbearings
in order according to the cylinder number.
PISTON PIN REMOVAL
No.Part No.
1
2 0136
3 0137
4 0138
5
Description
Base
Piston Support
Connecting Rod Guide Pin
Connecting Rod Guide Pin
Connecting Rod Guide Pin
6 0140 Piston SupportI
7
8 0142
Connecting Rod Guide Pin
Piston Support
9 Press PinI
10 216943 Stop Screw
11 10396 NutI
(1) Remove the stop screw from the base.
(2) Select the correct piston support for your appl ication (See
above). Fit the piston support onto the base. Place the
base on press support blocks.
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(3) Insert the press pin through the piston pin hol e. Select
the correct connecting rod guide pin (See above). T hread
the guide pin onto the threaded portion of the press pin.
(4) Position the piston assembly on the piston supp ort in
the press. With the press pin up as shown in Figure 4,
insert the guide pin through the hole in the piston and
through the hole in the piston support.
(5) Press the piston pin out of the assembly.
IMPORTANT: To avoid piston damage,
l The piston support must seat squarely against
the piston.
lVerify that the piston pin will slide through the
hole in the piston support.
(6) Remove the piston pin from the press pin.

ENGINE OVERHAUL Piston and Connecting Rod
Piston pin
Base
Front
Base
Connecting rod
guide pin
StopLock nut
1
INSTALLATION SERVICE
PIN INSTALLATION
(1) Thread the stop screw and lock nut
into the
base. Fit the correct piston support on top of the base,
the press pin, threaded end up, into hole in
the piston support until the
pin touches the stop
screw.
(2) Using the markings on the pin, stop
screw to the depth as shown below.
Depth: Refer to the operating instructions on the
tool.
(3) Place the base on press support blocks.
(4) Slide the piston pin over the threaded end of t he press
pin, and thread the correct guide pin
it.
(5) Coat the piston pin with oil, and
connecting rod
held in position, slide the guide
through the piston’
and connecting rod.
(6) Press the piston pin through’ until the
guide pin contacts the stop screw.
(7) Remove the piston
from the base. Remove
the guide pin and press pin from the assembly.
Due to production tolerance variations,
it is necessary to visually check the piston pin de pth
after installation to verify that the piston pin is cen-
tered. Adjust if
(8) Check that the piston moves smoothly.
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ENGINE OVERHAUL and
CrankshaftUpper side
side
ring gap and spacer gaprail
Timing belt side
Front mark
Identification mark
PISTON AND CONNECTING ROD
(1)Liberally coat engine oil on the of the piston,’
piston ring, and oil ring.
(2) Arrange the piston ring and. oil ring gaps
rail and
spacer) as shown in the ‘figure.
(3)Rotate crankshaft so that crank cylinder
bore.
Identification mark:
(4) Rotate crankshaft so that the is on the center
of the cylinder bore.
(5) Use suitable thread protectors on the connectin g
before inserting piston and rod assembly into
the cylinder block.
Care must be taken not to nick the crank
(6) Using a suitable piston tool, the:
piston and connecting rod into the ,
CONNECTING ROD BEARINGS INSTALLATION
When the bearing needs replacing, select and instal l a proper
bearing by the following procedure.
(1)Measure the crankshaft pin diameter and confirm its classi-
fication from the following table. In the case of a crankshaft
supplied as a service part, identification colors of its pins
are painted at the positions shown in the illustrat ion.
(2) The connecting rod bearing identification mark is stamped
at the position shown in the illustration.
Crankshaft pinConnecting rod
bearing
O.D. mm (in.)Thickness mm (in.)cationcationcationmarkmark
I
1None(1.7715-1.7717)
2None None21.491-1.495
(1.7711-1.7715)
3None White3
Connecting rod I.D.: mm in.)
Loosely tighten each nut to the bolt.
[Example]-
”(1) If the measured value of a crankshaft pin outer
diameter is between 44.995 and 45.000 mm (1.7715
and 1.7717 in.), the pin is classified as in the
table. In case the crankshaft is also replaced by
a spare part, check the identification colors of th e
pins painted on the new crankshaft. If the color is
yellow, for example, the pin is classified as “1”. I n
the above cases, select the connecting rod bearing having identification mark “1”.
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11ENGINE OVERHAUL Piston and
No.
Notch
CONNECTING ROD CAP
(1) Verifying the mark made during disassembly, install the
bearing cap to the connecting rod. If the connectin g rod
is new with no index mark, make
that. the bearing
locking notches come on the same side as shown.
(2) Make sure that the connecting rod big end side clearance
meets the specification.
Standard value: mm
Limit: 0.4 mm in.)
ROD CAP NUT
NOTE
The connecting rod nut should be installed’ the. ‘cylinder
head or the spark plug removed.
(1) Since the connecting rod bolts and nuts
the plastic area tightening ‘method, the should be
examined BEFORE reuse. the bolt threads are “necked
down”, the bolt should be replaced. Necking can be checked
running ‘a nut with fingers
to the full length of the bolt threads.
the nut does
not run down
the bolt should be replaced.
(2) Before installation of each nut, apply engine o il to the
threaded portion and bearing surface of the nut.
(3) Loosely tighten each nut to the bolt.
(4) Then tighten the nuts alternately to a torque o f Nm
(14.5
to install the cap properly.
(5) Make a paint mark on the head of each nut.
(6) Make a paint mark on the bolt end at the positi on 90”
to from the paint mark made on the nut in the direction
of tightening the nut.
(7) Give a
to to the nut and make sure that ,
the paint mark on the nut and that on the bolt are in
alignment.
Caution
(1) If the nut is turned less than proper
performance may not be expected.
tightening the nut, therefore, be careful to
a sufficient turn to it.
(2) If the nut is (exceeding loosen
the nut completely and then retlghten it by
repeating the tightenlng procedure from step (1).
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ENGINE OVERHAUL
11300850104
(1) Replace piston ii or seizure is evident
its surfaces (especially surface). Replace the
piston if it is cracked.
PISTON PIN
(1) the piston pin the pin hole a
You should feel a slight resistance. the
pin if it can be easily inserted or there ‘is .
(2) The piston and piston pin must be replaced
bly.
PISTON RING
(1) Check ‘the ring for
and replace if defects are evident: piston
has been replaced with a
one, the piston
also be replaced with new ones.
(2) Check for the clearance
the piston ring and
ring groove. If the limit is exceeded, replace the
or piston, or both.
Item
No. 1 ring
ring
Limit: 0.1 mm
in.)
-Standard value mm (in.)
(3) Install the piston ring into the cylinder bore. Force it
down with a piston, its crown being in contact with the
ring, to correctly position it at right angles to the cylinder
wall. Then, measure the end gap with a feeler gauge .
If the ring gap is excessive, replace the piston ri ng.
Standard value mm (in.)
No. 1 ring
ring
ring
Limit:No. 1, No. 2 ring 0.8 mm in.)
Oil ring 1.0 mm in.)
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ENGINE OVERHAUL Piston Rod
1I
PIN OIL CLEARANCE
(PLASTIGAGE METHOD)
(1) Remove oil from crankshaft pin and connecting rod
bearing.
(2) Cut the Plastigage to the same length as the width of
bearing and place it on crankshaft pin in parallel with
i t s a x i s .
(3) Install the connecting rod cap
tighten the
nuts to specified torque.
(4) Carefully remove the connecting rod cap.
(5) Measure the width of the Plastigage at its wide st part
by using a scale printed on the Plastigage package.
Standard value:,
mm
Limit: 0.1 mm in.)
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