TGB Blade 250 ATV Quad Service Repair Manual, Page 136Get this manual
12COOLING SYSTEM System Test
Test on the filler cap
Hermetically seal the filler cap, apply water and pressure to the filler capReplace it with new one if found failing to maintain the specified pressure within given time limit, or the opening pressure is too high or too lowThe specified pressure shall be maintained at least for seconds in the test Relief pressure for the filler cap: 0.9-0.15 kgfcm2 Apply pressure to the radiator, engine and water hose to check for any leakage
Pressure tester
Filler cap