DAYUANDAYUAN 17 pc Diesel Engine Compression Tester Kit Tool Set Automotive Compressor

Terrific case with a wide variety of tools to work on diesel engines at a very affordble price.

It works as it should and fit properly and is a very useful and universal tester

Bought to test old 1971 diesel Mercedes compression. I pulled out glow plugs and the adapter is so long that I could only fit into the last cylinder. Why is that size adapter sooooo long? I would have been much happier to use the adapter that threads I to glow plug hole than remove injectors. However, I did remove the injectors and another adaptor did indeed fit. Therefore this kit works with my diesel, but could have been better with a shorter adapter that was the same length as all the others.

Used this on a VW MK4 ALH engine. I had to remove the injector lines on a couple cylinders to get access. I'm very happy with this unit.

Great and economic kit and good delivery

I have been a mechanic for decades. I needed a diesel compression tester for my son’s vanagon. This was inexpensive so I figured why not.. on the second cylinder out of 4 the gauge would not hold pressure any more, rendering it useless. I bought this almost 2 years ago, but it has sat in my climate controlled garage on the shelf next to all my other specialty kits. I would have been further ahead just running to harbor freight and spending an extra $20. I saw other reviews said the same thing. It has a nice case and the pieces feel ok, just a terrible dial meter.

It's a used set and the hose to the gage is coming off its damaged and you can tell it was used by the red rag fibers used to clean them stuck to everything there's a used crush washer in the box and a few things were out of place we will see what the replacement looks like

When I measured low compression I checked the gauge with a high pressure air pump, and it was dead on.