The leak has confirmed as customer complained. Yuatsu Bench test can detect the trouble, the leak occurred after 2 minutes test at 33.4° C . Leak tester ALMC & Waterleak can't detect the trouble. After Cutting the Part found porosity. However in that area has quality point check. Based on Data trouble at August 2018 found 1.20% from total production. The trouble can be detected by visual camera zoom at ALMC and Bubble check at Assy. So that this trouble are very small chance flow to customers.