Mitsubishi Eclipse. Technical Information Manual (1994) — part 7
ENGINE <NON-TURBO> Base Engine
Prior to installing tensioner on the engine, it is
cylinder head expansion and contraction and for
sary to preload the tensioner plunger. This
timing belt stretch over the life of the belt. If the
plished by installing the tensioner in a vise and
tensioner fails, it is not serviceable and should be
slowly compressing the plunger. A tensioner plunger
replaced.
pin is installed through the body of the tensioner
and plunger. When the tensioner is installed on the
Timing belt guides are cast into the oil pump and
engine, it is necessary to preload the tensioner pivot
molded into the timing belt cover on engines. The
bracket assembly with a torque wrench prior to
purpose of the guides is to help with installation
curing the retaining bolts. The automatic tensioner
of the timing belt. They prevent the belt from falling
makes up for fluctuations in temperature through
off the sprockets.
Exhaust cam
sprocket
Intake cam
sprocket
Timing belt
tensioner
ENGINE <NON-TURBO> Base Engine
OIL PAN
The oil pan is a single-plane design, and is
constructed of stamped antiphon steel.
The rear main oil seal is a one-piece lip seal that
requires a special sleeve for installation. A new seal
comes equipped with the special sleeve that it used
to prevent seal rollover.
Rear
oil seal
Bed plate
OIL PUMP
The oil pump is located at the front of the engine
block, and is driven by the crankshaft. The pump
housing is made of cast aluminum, provides a guide
for the timing belt, and includes the crankshaft front
seal.
ENGINE <NON-TURBO> Cooling System
COOLING SYSTEM
The cooling system is of the water-cooled, forced
circulation type with the following features:
l
The water pump is mounted onto the front of
the cylinder block, and is driven by the cogged
side of the timing belt. The drive sprocket is
sintered metal. The pump body is made of die
cast aluminum; and a stamped-steel impeller
is used to pump coolant through the engine.
l
The thermostat housing is located on the left
front side of the engine. The thermostat is
mounted under the thermostat housing, and
the center element is offset from the center
of its diameter. Therefore, it can only be installed
one way. The thermostat has an air bleed (jiggle
pin) located in the flange, and an O-ring with
a locating dimple. the bleed faces upward. The
thermostat temperature rating is 90.5%
(195°F).
Coolant enters the water pump, where it is
routed through the engine block and into the
cylinder head. Then, the coolant is routed from
cylinder head to both heater core and the radia-
tor (engine hot) or through bypass (engine cold)
to the water pump where the cycle starts over
again.
A small-size, high-performance radiator has
been adopted for better cooling efficiency and
less weight.
Reduction in size of the automatic transaxle
oil cooler had resulted in a lowered radiator
position, which has permitted the “slant nose”
design of the body.
The cooling fan control has been integrated
into the centralized control by the engine control
module for better cooling efficiency, better fuel
consumption, less noise, and better accelera-
tion.
COOLANT FLOW
Radiator
Water pump
Block
CEN0102
ENGINE <NON-TURBO> - Cooling System
SPECIFICATIONS
Cooling method
Radiator
Thermostat
Water pump
Drive method
Items
Specifications
Water-cooled pressurized, forced circulation
with electrical fan
Pressurized corrugated fin type
Wax pellet type with jiggle valve
Centrifugal impeller
Timing belt
CONSTRUCTION
Radiator
Reserve tank
Radiator
oil cooler
(Dual pipe type)
oil cooler hose and
pipe
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