ENGINE COMPONENTS 37 C. Thermostat Test: 1. Endurance Test: To be tested for 1000 hours at 15 cycles/hour on sampling basis with alternate temperature of 990 C and 700 C at end of test S.O.T not exceed ± 30 C and max loss of lift 15%. 2. High Temperature Test: Keep it for one hour at 1350 C, change in opening temperature ± 30 C and loss of lift 12% is permissible. 3. Low Temperature Test: Keep it for 24 hours at -400 C, change in opening temperature should be 10 C.
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