4929 Valve Spring Height Micrometer Measurer, Black Aluminium, 1.600"-2.200" Height Range Precise Readings, Covers Most V8s

For the price, this is a good tool for a guy or gal who isn’t a professional. Mine is about .002 off, but installed height is generally acceptable .02 on either side of target installed height, and this discrepancy is easily calculated into the measurement. I actually put a little axle grease in the threads to make it a little slower to turn and a little less fiddly. Comp Cams offers a similar tool that has the same complaints of being off a little, but is a hundred dollars more expensive! This tool is a no brainer. The only thing I will say is if you have a small diameter valve spring retainer, you may have to get a shim to keep the retainer from slipping inside- but that’s easily worked around with a shim/ washer under the retainer. Just take a micrometer reading of that shim or washer and add that number to the installed height and you’re good. I had to do this because my retainer was for a 1.25” spring and it wanted to slip somewhat inside since it was just at the edge of doing that.

Nice. It is 0.002" - 0.003" taller than it indicates. More than good enough for valve springs. The graduations are 0.005" apart. I could face it off a little bit and make it just right, but that is unnecessary. I believe the description said it was steel, it isn't...anodized aluminum, which I think most are. It sure was cheap, but is made nicely. From China...I bet the brand name ones are also. The range is slightly greater than some others, I like that. The range and diameter are suitable for large-ish automotive stuff....I do some pushrod v8 work, it will work great. I also do some 4 valve/cyl car and motorcycle work, which doubt it will work with due to diameter. Won't fit into toyotas with shim/bucket valve actuation, for example. Even if it did, (maybe 3vz?) you couldn't use/read it down in the lifter bore.

Served the purpose it was intended for. The markings were slightly off but very minimal not enough to make a difference. Well worth the price 👍

This worked perfectly for what we needed. My husband now wants another as an extra

Work well for the money

Please refer to the photos: This tool has a .020" error in it's calibration. When it indicates 1.600" it actually measures 1.580" with a digital caliper. In each photo you can see that the indicated value is off by .020" when actually measured. In the case of photo #6 the tool is indicating a value of 1.850", but the actual measured value is 1.830". I attempted to contact the Vendor's Customer Service Website that's listed by Amazon, but the link takes you to a "Surgical & Dental Implant" Domain that is for sale! I would like to find one of these that is truly accurate. This is the 3rd one I've purchased (from different vendors), and none of them are accurate! The last 2 were off by .040" ~ .060" each!

I don’t understand the confusion or problems with this thing. I guess there is some possibility that somehow a few of these could be incorrectly machined but honestly, I would be surprised. Ipopped it out of the box, popped it between the jaws of a good mitutoyo vernier caliper. Mine measures within .001 anywhere from 1.6 up to 2.2 inches. I don’t see how I could ask for more. It fits over the valve stems and under the retainers on a couple different applications, I’ve tried so far (vortec BBC, A1 VW) so I can’t really see how you can go wrong with the thing. I would imagine there is a retainer out there somewhere or valve guide that it might not fit. If your retainer doesn’t sit flush on the collar, obviously you are gonna have a measurement problem. Anyway, I can’t see paying more for another brand unless you got some really funky retainers.

takes a little to figure out if you've never used something like this before but all and all a good product. One thing to note is that the measurements marked on the side are for end to end so if you have a retainer that sits inside of the tool then you need to subtract the inset height from the overall total but that's pretty easy. Overall for the money spent its a good tool

Fast delivery, works well ,great price

Muito eficiente

Good piece

Useless. No markings or anything on the inner side of the mic. The inside spins but didn't come out so you can't measure anything.