Powerbuilt Piston Ring Compressor, 2 Inch to 5 Inch Diameter, Compress Pistons, Ratcheting Lock, Release Lever, Slide into Cylinder - 648433, Silver

Work perfect

This dinky little thing doesn’t look like it would be too good at it’s job, but surprisingly it worked amazing, very simply, only complaint I have is that when loosening it’s all or nothing and scared the crap outa me the first time I loosened it, but it worked great and that’s all that matters

For the price it is fine, I only rated 4 stars because I can't see it lasting long but you get what you pay for and this works fine for building one motor but don't expect it to last much longer than that unless your building smaller motors like a lawnmower motor. I want lent recommend it for a Big Block!

I bought this for my first time replacing piston rings in a vehicle. The tightening mechanism is stout, and the thumb tab loosens the band with just a push (make sure your hands are around the band when doing this, otherwise the spring tension of the band makes it quickly snap open too loose). At first, I thought the allen wrench supplied to tighten the band could have been a better design, as it makes it too hard to tighten the band after a certain point. After installing my four 3.150" pistons, I realized that this prevented me from making the band TOO tight. As it was, the band was tightened the perfect amount, compressing the rings just enough while still allowing the oiled piston to be easily tapped into the bore. No problems with the band itself being tapped into the bore along with the piston. Judging from the construction quality of this tool, it will last me a lifetime even if I start replacing piston rings on a regular basis (which hopefully, I won't).

Work great for my 212 rebuild. If you buy it go easy. I cut the heck outta my hand with this thing, it’s sharp.

Worst ring compressor I have ever owned. Didnt even last to put in one piston

I used this compression tool & I had my doubts but once I tested it with a old piston & old rings I came to learn that you will need plenty of lubricant in the cylinder bore & Piston Rings it will make your life so much easier & Ensure all the all the rings are compressed probably before install. :)

This compressor does NOT open fully and nor does it open wide enough to slip over the cylinder of a 2-cycle engine. If you are using it on a 2-cycle engine, you will have to install the piston from above the cylinder rather than below, then CAREFULLY push the piston skirt out the bottom of the cylinder to install your wrist pin, pin bearing, and circlips. It does do just what it needs to do; worked great installing pistons in the jugs of my vintage Polaris and Yamaha snowmobile engines. I made a prop from scrap wood to hold the cylinder while I install the small parts in the piston. Still a whole lot easier than the usual struggle to squeeze the rings with one hand while manipulating the cylinder with the other, trying to engage the chamfer at the bottom of the cylinder! They do sell "pliers"-type compressors that work well from the bottom of the cylinder and swing away easily when done, but good ones are not available for anywhere NEAR this price point. If you need to get it done for short money, this compressor will do the job.

Gets the job done could be slightly stronger, great price for what you get can’t complain. I recommend!

As discribed good product

General quality so a bit high prices.

Exactement ce que je voulais fonctionne bien.

The ring compressor is not high quality and leaves a gap when installing pistons, causing some frustration during installation. If you are looking for a professional tool, this isn't it. If it's for a quick and dirty weekend job, this will do.