Compression Tester for Petrol Engines, 8-Piece YT-73022 YATO
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Availability:Dostępny od ręki
Shipping time:immediately
Shipping cost:From 3.29 Euro
catalog number:YT-73022
Availability:
EAN code:5906083054952
Product condition:New, originally packaged
Guarantee:24 months of consumer protection
Weight:1,13 kg
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YATO YT-73022 Compression Tester - 8-Piece Set
Professional compression tester for diagnosing petrol engines. The kit comprises a dual-scale gauge and a set of four brass threaded adapters, allowing measurements to be taken on most passenger cars and vans.
Compression Tester Features
Dual measuring scale
The gauge is fitted with a 0-300 psi scale and a 0-2 MPa scale, so pressure can be read in the units used in the technical documentation of different manufacturers. The range up to 2 MPa (20 bar) covers typical compression values in petrol engines (8-13 bar).
Complete set of brass adapters
The kit includes four threaded adapters: M10×1.0, M12×1.25, M14×1.25 and M18×1.5. Brass provides corrosion resistance and makes the adapters easy to screw in. The adapters fit the spark plug holes of most European, Asian and American vehicles.
Flexible 500 mm hose
The length of the hose allows the gauge to be moved freely during measurement, which makes work easier on engines with hard-to-reach spark plug holes. The rubber tip protects the thread from damage and ensures the joint is leak-tight.
Straight and angled extensions
Two extensions (straight and angled) provide access to the cylinders in engines with a complex engine bay layout. The angled extension is particularly useful on V6 and V8 engines and where fitting space is limited.
Technical Specification
| Model | YT-73022 |
| Manufacturer | YATO |
| Measuring range | 0-300 psi / 0-2 MPa |
| Engine type | Petrol |
| Threaded adapters | M10×1.0; M12×1.25; M14×1.25; M18×1.5 |
| Adapter material | Brass |
| Hose length | 500 mm |
| Number of items in the set | 8 |
| Packaging | Carrying case |
Applications of the Compression Tester
- Diagnosing the condition of a petrol engine before buying a used vehicle
- Checking the sealing of piston rings and valves during a routine service
- Identifying a cylinder with low compression when the engine runs unevenly
- Verifying the head gasket after removal or when there are signs of it having blown
- Assessing the wear of the piston and cylinder assembly in high-mileage engines
- Quality control of an engine rebuild after replacing rings or valves
- Measuring pressure in individual cylinders of multi-cylinder engines
- Diagnosing the causes of increased engine oil consumption
Compression Testing Procedure
Preparing for the test
Before testing, warm the engine up to operating temperature (80-90°C), remove all the spark plugs and disconnect the injectors or ignition coils. During the test the throttle should be fully open and the battery fully charged, so that the starter motor turns the crankshaft at a steady speed.
Interpreting the results
Correct compression pressure in a petrol engine is usually 10-13 bar (145-190 psi), depending on the design. Differences between cylinders should not exceed 10%. A pressure below 8 bar, or differences above 15%, indicate worn rings, valves or a faulty head gasket.
Choosing the Adapter for the Spark Plug Thread
Spark plug thread size depends on the engine model. Most modern petrol engines use an M14×1.25 thread (the most common standard) or M12×1.25 (older designs, Japanese engines). The M10×1.0 thread is found in small motorcycle and scooter engines, while M18×1.5 is used in older American engines and some V8 units.
Before starting the test, it is worth checking the vehicle's technical documentation or measuring the thread of the spark plug you have removed. Fitting the wrong adapter can damage the thread in the cylinder head, which requires costly repair.
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