Mityvac MV5530 Professional Compression Test Kit, Includes Everything Required for Performing Dry and Wet Compression Testing on Gasoline or Petrol Engines , Black

This is my 4th different compression tester that I buy... Finally something that actually works!!! Silverline air leaks everywhere. Sealey cheap one, inaccurate reading. The hose does expands due to pressure... Sealey deluxe 100 pounds and the same problem... This one the way it is build I can compare to a snap-on one. You have several varieties of sizes and it even comes with a service kit. For the price, quality and accuracy I doubt you are going to find a better one. The picture with the reading is on a bike with a cold engine. Just wanted to test the compression quickly.

If i'm honest, this wasn't very good quality at all. Its ok to use as a one off, but if you plan on keeping it for years, buy a different make.

The item was received well packaged. All fittings are steel and not brass like cheaper brands. Parts snap into molded grooves. Instruction manual is in several languages and easy to understand. Spare "O" rings and Schrader valves included. The Schrader valve is what is in the valve stem of your tire. Each hose has one of these at the spark plug end to improve accuracy in the reading. The gauge has a release valve to reset for the next test. I did several tests on a couple weed whackers to check for repeated accuracy. Doing any test, make sure the throttle is held open or blocked open to get an accurate reading. Not doing this will result in a lower reading. Manual recommends doing the test on a warm motor. My thought is the rings and piston will have a light coat of oil making for a better seal giving a more accurate reading. This is a high quality product well worth the extra money.

Found the kit to be very well made, from the blow moulded case down to the spark plug adapters, and it was a nice thing to find consumable spares such as o rings in the kit. The rubber hoses are good quality and suitable for what they need to do. flexible but not too flexible and will take a adapter out of a deep cylinder head without collapsing. The airline fittings felt nice and had a positive engagement with no leaks. The guage had a nice smooth action, and most importantly was consistent. I dont care if its inaccurate by a small percentage, but i want it to be consistent, and it was. From memory i think it comes with spare schrader valves for the guage to which is a bonus. All round a well made and at the price, a very good value tool. I have used several different brands prior, both name brands from leading auto shops like from bursons to cheap eBay chinese offerings, and i wont ever bother to use anything else in future if i need to replace it. Im now snooping around for vacuum tester as i know i will get quality. Thanks

This is quality engine compression test kit. The dial is large, clear and most importantly accurate. The hoses are made from quality rubber and resist oil and grime. Adapters for most spark plug sizes are included. This kit is a great alternative to the very expensive truck tools brands.

Habe auch schon 3 Kompressionstester umd das ist der erste der mich nicht belügt.

I have had several lower end compression testers over the yrs. Always get knocked around and plastic shields get damaged. Needles get bent, you know how it is in a shop. I have mighty vac pressure/vac tester and it’s been solid. So I bought this compression set. It’s almost to nice for me. It’s got so many options and extra parts. You really won’t be disappointed. The rubber impact around the gauge is not cheaply made. It’s accurate. One of my best purchases for my box.