Engine Cylinder Leak Down Tester M12 x 1.25 / M14 x 1.25

This professional engine leak down tester is designed for accurate diagnosis of internal sealing faults in petrol engines. The tool allows controlled compressed air to be introduced into the combustion chamber in order to determine leakage percentage and identify the exact source of pressure loss.

The tester is suitable for engines equipped with:

• M12 x 1.25 spark plug thread

• M14 x 1.25 spark plug thread

It enables precise detection of defects in:

✔ Intake valves
✔ Exhaust valves
✔ Piston / piston rings / cylinder wall
✔ Cylinder head / head gasket

By analyzing air escape noise and pressure loss percentage, mechanics can quickly determine whether the fault lies in the valve train, piston assembly, or head gasket area.

Leak Down Test Diagnosis Guide:

• Air noise from exhaust port or exhaust manifold ➜ Leaking exhaust valves

• Air noise from intake manifold ➜ Leaking intake valves

• Air noise from crankcase ventilation or dipstick tube ➜ Worn piston rings / piston / cylinder wall damage

• Air in adjacent cylinder or spark plug hole ➜ Defective head gasket

• Bubbles in cooling system or expansion tank ➜ Blown head gasket or cracked cylinder head

This tool is ideal for professional workshops and engine rebuild diagnostics where precise mechanical assessment is required.

Technical Specifications:

• Dual gauge test unit

  • Inlet pressure: 0 – 7 bar

  • Leakage display: 0 – 100%

• Spark plug thread adapters:

  • M12 x 1.25

  • M14 x 1.25

• Includes quick coupling hose system

Scope of Delivery:

• 1 × Dual gauge test unit

• 1 × Adapter M12 x 1.25

• 1 × Adapter M14 x 1.25

• 1 × Hose with quick coupling

• 1 × Adapter hose