Coupe L4-1.9L DOHC VIN 7 (1994)
2. Check full valve opening temperature. Use a pair of calipers and check the distance between thermostat bypass valve and frame when the
thermostat is cold. Heat thermostat in water until the main poppet valve fully opens. Measure the distance between the frame and bypass valve.
Subtract the valve open reading from the close position measurement. Check water temperatures and measurements to make sure thermostat is
opening at the proper temperatures and to the correct lift.
New: 100°C(212°F)
Used: 105°C (222°F)
If the valve opening temperature is not within specification, replace the thermostat.
3. Check the valve lift. Minimum valve lift:
New: 7.5 mm (0.295 in.)
Used: 6.0 mm (0.236 in.)
If the valve full opening temperature or lift are not within specifications, replace the thermostat.
4. Check that the main poppet and bypass valve springs are tight when the thermostat is fully closed. If necessary, replace the thermostat assembly.
5. Check the main poppet rubber seat. If the rubber is deteriorated, replace the thermostat cartridge.
