Mitsubishi 3000GT Service Manual page 414

Valve lift
ENGINE COOLING
INSPECTION
Check that valve closes tightly at room temperature.
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Check for defects or damage.
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Check for rust or encrustation on valve. Remove if any.
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Immerse thermostat in container of water. Stir to raise
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water temperature and check that thermostat opening
valve temperature and the temperature with valve fully
open [valve lift-over 8 mm (.31 in.)] are at the standard
value.
Standard value:
Opening valve temperature 76S"C (170°F)
Full-open temperature 90°C (194°F)
NOTE
Measure valve height when fully closed. Calculate lift by mea-
suring the height when fully open.
TSB Revision