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Leak Test Methods
Maintaining Leak Tight Seals with Autocouple Devices
Using Autocouple devices when leak testing smooth tubes and rough or irregular surfaces allows for maintaining a leak-tight seal.
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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