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The procedure for replacing the thermostat to the Opel Vectra B shall be performed in such a sequence:
(1) Cooling coolant.
(2) With the pliers, unbutton the thermostat hose.
(3) Bend the thermostat key with the T-8 TORs key.
4) Hose the hoses and remove the thermostat.
(5) Clean and degreasing the thermostat.
(6) A new thermostat and put on the tubes.
(7) Cooling coolant.