Mitsubishi LANCER EVOLUTION-IV 1998, Workshop Manual, Page: 264 / 526

ENGINE COOLING –
Thermostat
14-4
INSTALLATION SERVICE POINTS
"
A
A
THERMOSTAT INSTALLATION
(1) Install the thermostat so that the jiggle valve is facing
straight up.
Caution
Make absolutely sure that no oil is adhering to the
rubber ring of the thermostat. If the rubber ring is
damaged, replace the thermostat.
(2) When assembling the thermostat, be careful not to fold
over or scratch the rubber ring.
"
B
A
RADIATOR LOWER HOSE CONNECTION
(1) Insert each hose as far as the projection of the water
inlet fitting.
(2) Align the mating marks on the radiator hose and hose
clamp, and then connect the radiator hose.
INSPECTION
THERMOSTAT CHECK
(1) Immerse the thermostat in water, and heat the water while
stirring. Check the thermostat valve opening temperature.
Standard value: 76.5
±
1.5
_
C
(2) Check that the amount of valve lift is at the standard
value when the water is at the full-opening temperature.
Standard value:
Full-opening temperature: 90
_
C
Amount of valve lift: 8.5 mm or more
NOTE
Measure the valve height when the thermostat is fully
closed, calculate the valve lift by subtracting this
measurement from the valve height when the thermostat
is fully open.
Jiggle valve
Rubber ring
Valve lift