Mitsubishi 6M70 - Thermostat Inspection

14
14-35
Service standards (Unit: mm)
Tightening torque (Unit: N·m {kgf·m})
Lubricant and/or sealant
Inspection procedure
Inspection: Thermostat
• Stir the water using a stirring rod to maintain an even water tem-
perature in the container, then conduct the tests indicated below.
• If the measurement deviates from the standard value, replace
the thermostat.
(1) Valve opening temperature
• Hold the thermostat with wire to keep it away from the heat
source.
• Heat the water gradually to the valve opening temperature.
• Maintain this temperature for five minutes and make sure that
the valve is completely open.
• Make sure that the valve closes completely when the water tem-
perature drops below 65°C.
(2) Valve lift
• Maintain the coolant temperature at the specified temperature
for five minutes to keep the valve fully open.
• Measure the valve lift.
Location Maintenance item Standard value Limit Remedy
8 Thermostat
Valve opening
temperature
82 ± 2°C–
Replace
Valve lift/temperature 10 or more/95°C–
9 Thermostat
Valve opening
temperature
88 ± 2°C–
Valve lift/temperature 10 or more/100°C–
Mark Parts to be tightened Tightening torque Remarks
Water temperature sensor
For engine control
39 {40} –
For thermometer
Overheat switch 27 to 41 {2.8 to 4.2} –
Water joint 34 {3.5} Sealant
Eyebolt 25 {2.6} –
Mark Points of application Specified lubricant and/or sealant Quantity
O-ring Engine oil As required
Winding around threaded portion of water joint Teflon tape 3.5 turns