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This Sealey Petrol Engine Compression Test Tool Kit (CT951) is designed for automotive technicians and DIY enthusiasts needing to accurately measure petrol engine compression. Its primary benefit is providing clear, dual-scale readings (psi/kPa) via a large gauge, enabling precise diagnosis of engine health. A potential caveat is that while it includes common adaptors, specialized engines might require additional fittings not included in the standard kit. Key features include a versatile range of adaptors, a flexible hose for accessibility, and a durable storage case.
| Model Part Number | CT951 |
|---|---|
| Brand | Sealey |
The gauge displays a pressure range of 0-300psi (pounds per square inch) and 0-2000kPa (kilopascals).
The kit includes screw-in 14mm and 18mm adaptors, along with a 150mm rigid stem cone adaptor that fits most common spark plug holes.
No, this tool is specifically designed for testing the compression of petrol (gasoline) engines. Diesel engines require a different type of compression tester due to higher compression pressures and different fuel systems.
Ensure the engine is warm, the ignition and fuel are disabled, and the adaptor is securely sealed in the spark plug hole. Crank the engine for enough strokes (4-6) for the gauge reading to stabilize.
Use the side release valve to safely discharge the pressure from the gauge and hose before removing the adaptor from the spark plug port. Record the reading for comparison.
While not explicitly listed as a consumable, the hose is a standard component. If it becomes damaged, replacement may be possible through specialized suppliers or by contacting Sealey customer support.
The kit comes with a durable storage case designed to keep all components organized and protected. It is recommended to store the kit in this case when not in use.
Ensure the adaptor is securely seated in the spark plug hole, creating a good seal. Check for leaks around the adaptor or valve. Verify the engine is cranked sufficiently (4-6 compression strokes). Ensure the engine is at operating temperature.
This may indicate a leak. Check the seal of the adaptor. If the seal is good, a low reading could point to internal engine issues like worn rings or valves. Use the release valve to reset and re-test.
Try a different included adaptor (14mm, 18mm, or rigid cone). If none fit, your engine may require a specialized adaptor not included in this kit.
Ensure the valve is fully closed after pressure release. If leakage persists, inspect the valve mechanism for debris or damage. Contact the manufacturer for replacement parts if necessary.
Setup:
Compatibility:
This tool is designed for use on most petrol (gasoline) engines. The included 14mm and 18mm adaptors, along with the universal rigid cone adaptor, cover a wide range of common spark plug hole sizes. However, some specialized or vintage engines may have unique spark plug thread sizes that are not compatible with the provided adaptors. Always verify your engine's spark plug thread size before use if unsure.
Care:
