Leak Test Technology
Dürr Ecoclean's leak test products provide leak and flow testing of cylinder heads and blocks. Testing is typically performed in two stages: just after the cast head or block has been cubed for the manufacturing process, and again after final machining and plugging sub-assembly is complete. The cubed part leak-test determines whether the part has any leaks through critical fluid cavities such as the water jacket, oil galleries, low pressure cavities (head cover cavity), block crankcase cavity and head fuel passages. In the cubed state, the part is often tested for proper flow through fuel and oil passages as well.
Once the head and block has been final-machined, it is washed in preparation of the sub-assembly processes described above. After the sub-assembly processes, the part is leak tested again. This time the focus is usually to test the water jacket and oil gallery. At this stage the leak tests detect whether the parts installed during the sub-assembly process were properly secured. Cup and pipe plugs must not leak oil or water as dictated by the customer specification. Dürr Ecoclean has expertise in air decay and mass flow and leak testing.