Cylinder Head Water Jacket & Oil Drain-back Holes

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.