Compression Testers
Check engine compression to maintain top performance.
Testers with a quick-release coupler make it easy to connect and disconnect the gauge and the hose.
Add an optional adapter if you tester does not come with an adapter that matches your engine's spark plug thread size.
Hose | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Readout Type | Scale | Pressure Range, psi | Accuracy | Digital Display Type | Dial Dia. | Case Material | Lg. | Material | Reinforcement | Batteries Included | Includes | Features | Container Type | Each | |
For Gasoline Engine | |||||||||||||||
| Dial | psi, kg/cm2, bar, kPa | 0-300 | ±2% | __ | 3" | __ | 15" | Rubber | Fiber Braid | __ | M14×1.25 mm Spark Plug Adapter, Replacement Valve Core | Quick-Release Coupler | __ | 0000000 | 000000 |
| Dial | psi, bar | 0-300 | ±3% | __ | 2 3/4" | __ | 24" | Rubber | __ | __ | M14×1.5 mm Spark Plug Adapter on 12" Hose, M14×1.5 mm Long Thread Spark Plug Adapter on 12" Hose, M12×1.25 mm/M16×1.5 mm Spark Plug Adapter on 12" Hose, M10×1 mm Spark Plug Adapter, 8" Extension Tube, 24" Extension Hose, Repair Parts | __ | Plastic Case | 00000000 | 000000 |
For Diesel, Gasoline Engine | |||||||||||||||
| Digital | psi | 0-300 | ±1% | LED | __ | Plastic | 18" | Rubber | __ | Yes | 1 Spark Plug Adapter, 1 Glow Plug Adapter | Quick-Release Coupler | __ | 0000000 | 000000 |
Cylinder Leak Testers
Test how well your engine cylinder holds compressed air. Often used after getting a low reading from a compression tester, these leak testers show the percentage of the air leaking out of your cylinder. Remove all spark plugs from your engine and rotate it so the cylinder being tested is at the top. Make sure the cylinder is top dead center on its stroke, with both valves closed. Connect one end of these testers to the spark plug hole, and the other to a compressed air source. Fill the cylinder to its specified air pressure, and the gauge on these testers will show how much air is leaking out.
Add a whistle to help pinpoint the location of a leak. If the sound of the whistle changes while the cylinder moves through its stroke, you’ve found the leak. Connect to the end of the hose or adapter on a leak tester.
Hose | Air Connection | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Readout Type | For Engine Type | Scale | Pressure Range, psi | Accuracy | Dial Dia. | Lg. | Material | Quick-Disconnect Shape | Coupling Size | Includes | Features | Container Type | Each | |
| Dial | Gasoline | psi, bar | 0-100 | ±3% | 2 3/4" | 26" | Rubber | Industrial | 1/4 | M14×1.5 mm Spark Plug Adapter, M14×1.5 mm Long Thread Spark Plug Adapter | Leak Percentage Dial, Quick-Release Coupler | Plastic Case | 0000000 | 0000000 |
Hose | |||||
|---|---|---|---|---|---|
| For Engine Type | Thread Size | Lg. | Material | Each | |
| Gasoline | M14 × 1.5 mm M18 × 1.5 mm | 24" | Rubber | 0000000 | 000000 |