This diagnostic tool is used by mechanics and automotive technicians to assess the internal condition and overall health of an internal combustion engine (typically petrol/gasoline engines) by measuring how well a cylinder holds compressed air.
Key Components of the Kit:
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Dual Pressure Gauges:
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One gauge monitors the input air line pressure.
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The second gauge displays the percentage of cylinder leakage (usually color-coded into ranges like low, moderate, and high).
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Pressure Regulator: Allows you to calibrate and control the incoming air pressure.
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Flexible Hose & Spark Plug Adapters: Connects the manifold assembly to the engine's combustion chamber through standard spark plug hole sizes (such as 14mm and 18mm).
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Molded Storage Case: Keeps all the components organized and protected.
Common Applications:
By pressurizing a cylinder while the piston is at Top Dead Center (TDC) on the compression stroke, you can pinpoint the source of internal engine leaks by listening or looking for escaping air:
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Worn Piston Rings: Air escapes past the rings and into the crankcase (visible/audible through the oil filler cap).
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Damaged Intake/Exhaust Valves: Air leaks through the intake manifold or exhaust tailpipe.
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Blown Head Gasket or Cracked Cylinder Head: Air bubbles may appear in the radiator coolant reservoir or leak into an adjacent cylinder.