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Leak Test Methods
Occlusion Testing
Occlusion testing is the functional testing of products to ensure pathways are open and have not become blocked or partially obstructed.
Scope of Work
Test the integrity of the cylinder head water jacket for porosity, while simultaneously testing each oil drain-back hole for casting blockage.
Purpose
To discover porosity of the cylinder head water jacket and casting blockage of the oil drain-back holes.
Methodology
Cylinder Head water jacket can be tested either with mass flow or pressure decay. The oil drain-back hole will be tested using back pressure flow.
- Typical test pressure (water jacket) = 1.4 Bar to 4.1 Bar
- Typical leak rate (water jacket) = 10 CC/Min to 25 CC/Min
- Typical test pressure (oil drain-back) = 0.13 Bar to 0.34 Bar
- Typical obstruction = 20% or greater
Test Sequence
During the testing of the water jacket each oil drain-back hole will be tested for blockage.
Tester
- Vector 3 channel tester:
- Channel #1 testing the water jacket.
- Channel #2 and channel #3 testing the oil drain-back holes.
- All tests performed simultaneously in (1) test station using (1) Vector tester.
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