OTC 5606 Compression Tester Kit for Gasoline Engines

Great quality and accurate readings! Works great with different adaptors.

Used as a professional technician, works perfectly, all included parts needed, very high build quality.

Overall, this kit is an excellent value. Professional grade quality. Hoses to plug hole are long, makes it easier getting to hard spots. High quality neoprene hoses, air coupler fittings/shrader valves. And, the hose swages are chromed! Pressure gage: gage is encased in a thick protective rubber cover. Good protection from bumps. Pressure relief valve on gage is sturdy and works great. Gage hose is long, allowing enough slack to move around while doing compression checks on engine. The plastic storage box is well constructed and has a spot for everything: two spark plug hoses (1-14mm reg reach tip, 1-14mm long reach tip); one pressure gage/hose; three spark plug hole adapter fittings (18mm, 12mm, 10mm). A really great kit.After examining/using this kit, I really REGRET purchasing all those "cheap" compression testers in the past. They didn't last after a few accidental bumps/drops, had short hoses, gages frosted over, etc. This is a NO REGRETS purchase. Simply put, this might be the LAST compression tester you will ever buy, for the DIY person or for the professional! Strongly recommend this tester.

I purchased this compression tester to evaluate my 2004 Nissan Altima. I had been looking at OTC, Innova or Mityvac as my most preferred options. I was looking for a set with numerous attachments to accommodate automobiles, motorcycles and other small engines. I was also looking for a set with a hard case to hold all those attachments. Images of the kit are shown below. A nice feature are the instructions on the inside of the top cover. If you don't perform these kinds of tests daily, you may forget the procedure and these instructions save you time from having to look for information elsewhere.To be honest, I had a concern about the dial's blue face and not being able to read it as easily as a white face. My concern wasn't warranted, as the unit has great contrast and a large face to make reading the results easy. Two units are displayed on the gauge, psi or KPa. Actual compression results were consistent when repeated on a cylinder. That's not to says the results are 100% accurate, but if nothing else they're consistent.All in all, I highly recommend this set. I obviously can't vouch for long term performance, but the gauge, hoses and connectors seem robust. I don't expect issues other than normal wear over time.

About as reliable as the rest of the cheap Compression testers out there, at 4 times the price. OTC is usually a good brand, but from, my experience this time it seems to be just another cheap pile of rubbish.Came in a nice plastic box, took it out - made sure to keep all threads and connectors clean and connected it to a known good engine. Fuel off, throttle open and cranked - good compression.Took it to a known bad engine, same process and it registered lower - fine.Took it back to known good engine and tested one final time - the little plastic top on the pressure release valve flew off and suddenly no compression being registered. Never worked again after that.I'm going returning this pile of rubbish and going to my local parts store to get a local brand.EDIT: Don't I feel stupid....looks like it needed a little bit of oil added to the cylinder to get compression actually staying in the schraeder valve. All working after a little modding.

Everyday use in a professional environment very accurate

Well made product and easy to use I recommend it

This is a great compression tester kit. It has everything you could possibly need, including fittings for every size plug I would ever expect to encounter. The long line from the fitting to the gauge allowed me to put the gauge right up to the windshield so I could sit in the car and crank the engine and watch the gauge from inside.This is a heavy duty, professional grade tool.I bought this because I could not find my old tester after I moved. Of course, I found the old one after I got this, but I'm still glad I odered this because my old one looks and feels like a cheap low end junk compared to this.BTW, the case is a great addition. Everything snaps in snugly and stays in one place, so the fittings don't get lost in tool drawer.