Apparatus for and method of testing diesel engine heads for fuel and/or collant leaks
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United States of America Patent
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-
Mar 23, 1993
Grant Date -
N/A
app pub date -
Oct 21, 1991
filing date -
Oct 21, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for testing an engine cylinder head for leaks regardless of whether the cylinder head is attached to an engine block. The cylinder head has a fuel injector aperture extending from a first side to a second side thereof, has a coolant passageway communicating with the fuel injector apertures between the first and second sides of the cylinder head, and has a sleeve in the fuel injector aperture to separate the fuel injector aperture from the coolant passageway. An air-tight seal is formed in the fuel injector aperture between the coolant passageway and the first side of the cylinder head. Another air-tight seal is formed in the fuel injector aperture between the coolant passageway and the second side of the cylinder head. The fuel injector aperture is then pressurized between the air-tight seals thereof. The pressure of the fuel injector aperture between the air-tight seals is then monitored over a period of time.
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