engine MITSUBISHI SPYDER 1990 Service Repair Manual

11ENGINE OVERHAUL Cylinder Head
(6) seat is properly positioned, the width of intake
and exhaust seats should be 0.9 to 1.3 mm
to
in.).
(7) Check valve tip to spring seat dimensions A aft er grinding
the valve seats or faces. Grind valve tip until
A is equal to 47.99 mm (1.889 in.) for exhaust valv e
and 48.04 mm (1.891 in.) for intake valve over spri ng
seat when installed in the head.
The valve tip chamfer may need to be reground to pr event
seal damage when the valve is installed.
(8)
the valve spring installed height after refacing
the valve and seat. Make sure measurements are take n
from top of spring seat to the bottom surface of spring
retainer.
If is greater than 38.00 mm (1.496 in.), install a
0.762 mm
in.) spacer in head counterbore under
the valve spring seat to bring spring height back w ithin
specification.
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ENGINE OVERHAUL Oil Pan,
Special tool
REMOVAL
(1) Remove flywheel or drive plate:
(2) Remove rear plate.
‘Remove oil filter.
(4) Remove adapter.
. .
(5) Drain engine oil and remove oil pan.
(6) Clean oil pan and all gasket surfaces.
(7) Remove oil pick-up tube.
( 8 ) R e m o v e c r a n k s h a f t using T o o l ,
Caution
Do not nick shaft seal surface or seal
(9) Use Tool to remove front,
careful not damage the
oil pump.
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11E N G I N E O V E R H A U L Oil Pan and Oil’
Revision
0057
(1) Apply Loctite 51817 to oil pump as shown in the figure.
Install oil-ring into the counter bore on the oil p ump body
discharge passage.
(2) oil pump slowly onto crankshaft until seated to
engine ‘block. Tighten fasteners to 23 Nm (17
(3) Install new seal by using Tool
(4) Place seal into opening with seal spring toward the inside
engine. Install seal until flush with cover.
(5) Install crankshaft sprocket using
bolt, washer and thrust bearing, from Special ‘Tool Kii
and Tool
,
.
(6) Install oil pick-up tube.

E N G I N E O V E R H A U L Oil ‘Pan and Oil Pump
Locating
I
adapter
Locate wrench
at base of filter
(7)Apply Loctite 18716 or equivalent at the to
bed plate parting line.
(8) Install the oil pan gasket to the plate. Mopar
Silicone Rubber Adhesive Sealant or equivalent to h old
in place.
(9) Install oil pan and tighten the to 12 Nm (9
(lO)Ensure O-ring is in the groove on adapter. Alig n roll
pin into engine block and tighten assembly to 55 Nm
(40
Caution
When servicing the oil filter avoid deforming the f ilter
can by installing the remove/install tool band strap
against the can-to-base lockseam. The join-
ing the can to the base is reinforced by the base
plate.
new filter gasket and install it on filter.
filter mounting surface. The surface must be
smooth, flat and free of debris or old pieces of rubber.
filter on until gasket contacts base. Tighten to
turn or Torque to 21 Nm (15
rear plate.
flywheel or drive plate.
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11E N G I N E O V E R H A U L Oil Pump
Gasket
Sprin
Oil pump body
Outer
Oil pump cover
PUMP
D I S A S S E M B L Y
(1) To remove the relief valve,’ proceed as
(a) Remove the threaded and gasket from the oil
Caution
Install oil pump pressure relief valve as shown
in the figure, or serious damage may occur.
(b) Remove spring and relief valve.
Remove oil pump cover screws, and lift off cover.
Remove pump rotors.
R E A S S E M B L Y
(1) Assemble pump, using new parts as required.
Install the inner rotor with chamfer. cast,
oil pump cover.
(2) Tighten cover screws to 12 Nm (9
(3) Install relief valve, spring, gasket cap. Tighten cap
to 54 Nm (39
(4) Prime oil pump before installation filling cavity
with engine oil.
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ENGINE OVERHAUL
INSPECTION
(1) Wash all parts in a suitable solvent and
for damage or wear.
(2)Mating surface of the oil pump should be smooth. Replace
pump cover if scratched or
(3)Lay a straightedge across the pump cover surface.
a feeler gauge of 0.076 mm ‘in.) or more can be
inserted between cover and straightedge, cover shou ld
be replaced.,
Limit: 0.076 mm in,)
(4 Measure thickness and diameter of outer rotor. If outer
rotor thickness measures 7.64 mm
in.) or less, or
if the diameter is 79.95 mm (3.148 in.) or less, re place
outer rotor.
(5) If inner rotor measures limit or less, replace inner rotor.
Limit: 7.64 mm in.)
(6) Slide outer rotor into pump housing, press to o ne side
with fingers and measure clearance between rotor an d
housing. If measurement exceeds the limit, replace hous-
ing only if outer rotor is in specification.
Limit: 0.39 mm in.)

1E N G I N E - ‘ O i l
Feeler
Outer0rotor
G a s k e tI
(7) Install inner rotor into pump housing. If clear ance between
inner and outer rotors exceeds the limit, replace b oth
rotors.
Limit: mm in.)
(8) Place a straightedge across the face pump
between bolt holes. a feeler mm
in.) or more can be inserted and
straightedge, replace pump
Limit: 0.102 mm ,
(9) Inspect oil pressure relief valve plunger for scoring-and.
free operation in its bore. Small marks may. be rem oved,
with wet or dry sandpaper.
relief valve spring has a free length
60.7 mm (2.39 in.). It should test between -and
when compressed to 40.5 mm (1.60 in.). ,
that fails to meet specifications.
.
oil pressure is and pump is within
inspect for worn engine bearings, or other for
oil pressure loss.
. .
, __ . ,
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Piston,
ENGINE and Cylinder
Rearcrankshaft seal
metal caseEngine
Engine block
crankshaft seal
crankshaft seal
dust lip
PISTON, CONNECTING ROD
CYLINDER BLOCK
REMOVAL
(1) insert a flat ‘screwdriver between the dust
lip and the metal case of the seal.
Angle the screwdriver through the dust lip metal
case of the seal. Pry out seal.
Caution
Do not permit the blade c o n t a c t
crankshaft seal surface. Contact of the screwdriver
blade crankshaft edge (chamfer) is permitted.
(2) Remove top ridge of cylinder bores with areliable ridge
reamer before removing pistons from cylinder block.
Be sure to keep tops of pistons covered during this opera-
tion. Mark piston with matching cylinder number.
(3) Ensure connecting rods and connecting rod caps match
and proper set for the cylinder number. Identify them
if necessary.
(4) Pistons and connecting rods must be removed fro m top
of cylinder block. Rotate crankshaft so that each connect-
ing rod is centered in cylinder bore.
(5) Remove connecting rod cap bolts. Push each pist on
and rod assembly out of cylinder bore.
Be careful not to nick crankshaft journals.
(6) After removal, install bearing cap in the conne cting
orientation on the mating connecting rod.
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11ENGINE OVERHAUL and
Piston, Rod
D I S A S S E M B L Y
(1) Separate piston from rod by removing piston
pin.
(2) a suitable ring expander,, remove and inter-
mediate piston rings.
(3) Remove the upper oil ring side rail, lower oil ring side
rail and then oil ring expander from piston.
(4)
ring grooves of any carbon deposits.
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Rod
ENGINE and Cylinder
I
Front of engine
REASSEMBLY
(1) Install rings with manufacturer’s mark facing up, to-
ward the top of the piston.
Caution
Install piston rings in the following order:
(a) Oil ring expander.
(b) Upper oil ring side rail.
(c) Lower oil ring side rail.
(d) No. 2 intermediate piston ring.
(e) No. 1 upper piston ring.
(2) Install the side rail by placing one end betwee n the piston
ring groove and the expander. Hold end firmly and p ress
down the portion to be installed until side rail is in position.
Do not use a piston ring expander.
(3) Install upper side rail first and then the lowe r side rail.
(4) Install No. 2 piston ring and then No. 1 piston ring.
(5) Position piston ring end gaps as shown in the f igure.
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