|Item Weight||5.2 pounds|
|Product Dimensions||16.7 x 8.1 x 1.3 inches|
|Item model number||4572|
|Is Discontinued By Manufacturer||No|
|Manufacturer Part Number||4572|
|OEM Part Number||4572|
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OTC 4572 Large Valve Spring Compressor
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- Designed to compress valve springs on overhead valve engines
- Includes two valve spring adapters, which fit valve spring retainers up to 1" (25mm) and 1-3/16" (30mm)
- Unique, direct action compressor lever gives better visibility of valve spring retainers located in difficult access areas
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Jaw opening of 1-3/8 inch to 5-5/8 inch (35mm to 142mm) and throat clearance of 5-7/8 inch (150mm).
From the manufacturer
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Technicians are problem solvers who aren’t afraid of sweat on their brow and grease on their hands. They provide high quality services that demand high quality tools. When they need a reliable tool, they know they can depend on OTC tools to deliver.
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For those reviewers stating the grip hurts your hand, you need to READ THE DIRECTIONS!! The handle is really just there to allow you to quickly get the tool on and off the cylinder head. Once you clamp down, there really should be little to no tension on the valve spring. Once clamped, you use the valve side T-handle to apply tension to the spring! The circle that contacts the valve face will sit on the valve and not spin, so no worrying about damage to the valve face
I found that compressing the spring and then letting it sit for around 15 seconds was often enough to get a stuck keepers to spontaneously free itself. If you get a tough one, I had success with applying tension, then lightly tapping the keeper-side of the tool with a hammer.
Overall, this tool was well worth the money over smaller, cheaper tools.
Don't forget to loosen up the valve stem retainer by somehow stopping the valve from opening with something that won't damage it (like a piece of wood or the like) putting a socket a little less than the diameter of the valve spring retainer over the spring and give it some light taps with a hammer - don't go bananas on it, just a few taps to get it loose before trying to use the compressor on it. You'll feel it move when it's loose.
As far as quality is concerned, this is pretty heavy-duty. I can't imagine bending it as long as you make sure to loosen up the spring retainers before you use the compressor on it. And to re-iterate don't try to compress the springs with the handle - it's pointless and even if you manage to do it, it will only hurt your hand and maybe save you like 30 seconds over just turning the T-bar like you're supposed to.
First, Summit Racing is the absolute best: best people, best service, quick deliveries, everything... For this product (OTC Universal Overhead Valve Spring Compressors 4572), it looks great and seems sound of basic principles when first received, and it seems other folks have had great success on their vehicles, from a 1.9L Passat, to ZX6R motorcycle, to a 2006 VW 2.0... but folks with heavier springs find this tool lacking, as did I. My first use of this tool (today, 9/14/17) is on TFS-30410003-M64 Trick Flow Small-Block Chevy heads. I discovered that I could use the lever for a bit of compression, and then the swivel-screw with slide-rod at the other end to compress the spring further. The problem with this was that, on the 6th spring, the threads failed, and now will no longer spin freely (it actually rolled the threads over inside the nut and now requires a LOT of effort to turn through the damaged area)... Additionally with the tool, the rubber sleeve over the lever slides up and off when being used, even for this short period of time (very annoying to have to keep pushing it back on, especially while in the middle of a 'squeeze'. And last, the steel "semi-cupped" disk that contacts and presses against the valve has a very sharp rim and can potentially mar the valve face.
I believe this tools would do a great job on lighter springs (after all, the video I watched on YouTube featured a pregnant woman using it with ease), but if you have a heavier-spring application, possibly look to the LMS Racing spring compressor also on Summit Racing's website (it is much more expensive, but it's definitely built for the heavier springs -- doesn't include a lever, just the screw to compress the spring -- If only the screw on this OTC unit were of the quality and size of the LMS with a coated surface on the part contacting the valve.)
Top international reviews
A few people have commented about a lack of grip tape in the correct place but I didn't find this an issue.
Overall, good quality tool once you figure out a few tricks to make it work for you.
No issues at all compressing the springs and removing the valves.
Very useful in making a valve job go much easier.