Dayuan Tools
A comprehensive 17-piece diagnostic kit for testing compression on a wide range of diesel vehicles, featuring a high-precision 70 Bar gauge.
Professional Grade Diagnostics
The Dayuan Professional Diesel Compression Test Kit is an essential diagnostic tool for any automotive technician working with diesel engines. Designed to identify worn valves, carbon build-up, and blown head gaskets, this kit provides accurate readings that allow you to diagnose internal engine health without a full teardown.
Wide Vehicle Coverage
Equipped with a vast array of adaptors, this kit is compatible with most diesel engines found in the UK market today, including those from Toyota, Mitsubishi, Ford, VW, and Vauxhall. The set includes both glow plug and injector adaptors to ensure you can access the combustion chamber on nearly any configuration, including common-rail and older indirect injection systems.
Built for the Workshop
Featuring a large, easy-to-read 75mm gauge protected by a heavy-duty rubber bumper, this kit is built to survive the workshop floor. The 400mm high-pressure hose is reinforced for durability and features a quick-release coupling for fast transitions between cylinders. All components are housed in a rugged carrying case, keeping your diagnostic tools organised and protected.
Specifications
How to Use
- Ensure the engine is at normal operating temperature before starting the test.
- Remove the glow plug or injector from the cylinder to be tested.
- Select the correct adaptor from the kit and screw it into the cylinder head.
- Connect the gauge to the adaptor using the quick-release coupling.
- Crank the engine for several seconds and observe the maximum pressure on the gauge.
- Press the release valve to reset the gauge before moving to the next cylinder.
Customer Reviews
Solid bit of kit. Used it on a Toyota Hilux that was struggling to start in the cold. The M10 adaptor fit perfectly and the gauge confirmed low compression on cylinder 3. Saved me hours of guesswork.
Alistair Graham, Glasgow
Impressive quality for the price. I've used the more expensive Snap-On versions and this Dayuan kit holds its own. The quick-release coupling is very secure and doesn't leak.
Gareth Evans, Cardiff
As an engineering lecturer, I appreciate the calibration accuracy. We tested this against our lab standards and it was within 1% across the scale. Excellent for vocational training.
Dr. Arjan Singh, Birmingham
Good value for money. The case is a bit chunky and the latches are stiff, but the actual tool works exactly as it should. Used it on a Transit van last week with no issues.
Oliver Wright, Bristol
Fast delivery and well packaged. I'm a mobile mechanic and this kit has already paid for itself after three diagnostic jobs. The hose length is perfect for getting around manifolds.
Rebecca Thompson, Leeds
The adaptors are well-machined. My only minor gripe is that the manual could be more detailed for beginners, but any pro will know exactly what to do with it.
David Patel, Leicester
Bought this for my husband's workshop. He says it's the best diagnostic tool he's had in years. Very robust and the readings are consistent.
Charlotte Evans, Cardiff