Testing engine blocks, transmission cases, oil pans, aluminum wheels and other large automotive castings can be challenging. For instance, a bare engine block can be more than 2 feet long and weigh more than 85 pounds.
Leak testing big parts is not as easy as it is for smaller components, such as fluid reservoirs, air filters or gas caps. Cycle time and accuracy are challenges, mainly due to the size of the part under test. Sealing is also a challenge, because of the surface texture associated with cast parts.