67605 Valve Spring Compressor Tool Compatible with 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LS3 LS6 Chevy LSX Camaro, Corvette, Trans am, GTO, G8, CTS V, GM Trucks

Out of all the different cheap tools for valve springs, this is the only one that worked for me. I'm really glad I didn't shell out the money for the name brand version. Was able to get all 8 pairs of valve springs set back into place on my 2013 GMC Yukon (6.2L Vortec). Like other reviews say, it does in fact take a bit of practice (and some cursing). Didn't have to do any re-threading or modifications, just had to mess around with it. Once I got the hang of it the rest was a breeze.A few things that helped me:1) The instructions show that you can install the aluminum spacer two ways, top or bottom. In my particular case, I had to have the spacer installed on the bottom as shown in the 2nd picture.2) When putting everything together, I used a small bit of engine assembly lube on the center screw that is used for clamping down the springs. After doing all 16, there's no noticable wear on the threads other than the paint now being gone. Only other bit of wear I noticed were shavings around the center nut & washer after doing a couple springs. Looks like it was just paint coming off, both from the screw and the washer spinning against the clamp as I was tightening things down. Just be sure to wipe it off and be careful not to lose any debris inside the cylinder head.3) Holding the tool in place when bolting it down to the cylinder head helped make sure both springs were covered correctly.4) Lastly, I tightened down the center nut just until it was snug against the springs. Then, while holding the "clamp" part of the tool against the springs (as shown in pic #3), I was able to nudge the springs as needed with my other hand or adjust the positioning of the clamp as needed. Doing it this way helped make sure the springs were centered around the valve stem as I tightened it down and allowed me to set the keepers properly.Hopefully this helps someone spend less time figuring out how the thing works. Other than the trial & error this was a wonderful time saver.

Worked great. Easy instructions. Easy to use. Great price. Replaced springs on a ls. Fit great feels durable.

Holds up fine. Can be a pain to get spring to clamp down straight to get both keeps on but after some use it works pretty good for the price

Just what I needed

For the people writing bad reviews. First off, it's a $15 dollar tool compared to a name brand $75tool , what would you expect. It did great for me, I did have the heads off not sure how'd they would do with them installed but they did great. Did all 16 springs in 30 minutes no issues.

As you can see the bolt holes are drilled at an angle making it impossible to thread the bolts unless you use a tap and dye set to rethread it straight, then get new bolts that fit the pitch. BUY ELSEWHERE.

Due to nerve damage, I do not have enough hand strength to use a normal spring compressor. This thing has been an absolute lifesaver. Extremely easy to use. I used a ratcheting wrench with minimal effort. No broken or bent bolts although I can see how it would happen if not used properly. If you take your time to make sure the tool is laid flat before tightening the nut, it's nearly impossible to mess it up. I've done6 cylinder heads with this so far and couldn't imagine not having it. It also takes up WAY less space in the toolbox which is great.

This tool is simple enough and does the job well whether you're changing springs on or off the engine. If you're going to use it to do the springs on the engine make sure you have an air fitting to pressurize the cylinder and keep the valves up. It seems to be pretty durable and long-lasting.