A new method for leaktest has been developed to check the leakage of some automobile parts, such as intake/exhaust valve, water jacket, oil gallery of cylinder block, and so on. The basic principle of the new method is based on using a new type air gauge, which has got the feature of large measuring clearance and very high amplification, and can detect very small pin holes in casting.
The First Automobile Works
3rd International Pacific Conference on Automotive Engineering (1985)
Motor Vehicle Technology-Mobility for Prosperity-P-169