Description
Cummins ISX 3164001 Injector Leak Test Kit Alt. (0983-L, AM-3164001)
This kit includes high-quality aftermarket alternatives for:
- Test Adapter Plate
- Barb Hose Fitting
- Flexible Tube (Tygon – Diesel Resistant)
Applications:
- Cummins ISX
- Cummins Signature
Usage: The kit is used with a manometer to test injectors for leaks that cause slow shutdown or excessive run-on after key-off.
Test Procedure:
- Leak Detection: Checks for combustion gas leaks through the injector rail check valve or other conditions allowing gas leakage into the fuel rail.
- Backpressure Creation: When the engine is barred over, the piston on the compression stroke creates backpressure against the injector.
- Pressure Measurement: If the rail check valve leaks, the air is pushed into the fuel rail. Pressure is sensed at the test fixture, replacing the metering actuator. A manometer connected to the test fixture measures pressure as air escapes through the leaking valve. Alternatively, using a container of water will show bubbles as air escapes.
Cylinder Identification:
- The overhead set marks on the damper identify which cylinder is on the compression stroke, helping to pinpoint the malfunctioning injector if a change in manometer pressure or bubbles is observed.






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