Joyner JNSZ1600QL Owner's Manual page 87

——Loosen three M6 × 4 0 bolts and remove them
——Remove thermostat seat with thermostat assembly
——Pry out spring clip by chisel or screwdriver
——Take out the thermostat
——Take out sealing gasket
——Remove sealing gasket of thermostat seat
Measure the opening temperature of thermostat in hot water.
——Clip the thermostat seat, and put the rubber seal ring into the thermostat hole.
——Install the thermostat (with spring outward)
——Install spring clip, ensure that the clip is clipped in the thermostat seat groove.
——Install the sealing gasket of the new thermostat seat on the thermostat assembly with a bolt.
——Install the thermostat together with thermostat assembly into the rear end hole of cylinder head. Finger
screw in 3 bolts and tighten to 9-12Nm.
——Tighten the hex head plug with the sealing gasket on. Tightening torque is 38-42Nm.
——For the engine equipped with electrical heater, install air intake preheating switch. Tightening torque
is 38-42Nm.
3. Removal and assembly of the water temperature sensor. Removal:
——Remove the water temperature sensor (at the exhaust side, under the rear lug).
Assembly: ——Before installation, apply the lotite
Fig.125
86