The piano is built around the pin block on an upright piano. To replace the pin block on an upright would require complete disassembly of the piano case. To replace the pin block is very expensive on a grand / baby grand piano, but on an upright it is generally considered not doable. A cracked pin block is will render the piano useless unless replaced. One concern in doing this is that you don’t want to crack the pin block. All other methods are just as time-consuming, and the results are not as not as good (I speak from the reading I have done on the subject, not personal experience). There are several methods to take care of this problem, but the best overall method is to replace the existing tuning pins with the next larger size. Each time the pins are adjusted, the hole becomes a bit bigger in the tuning block. This is due to the number of times the piano has been tuned over the years. When a piano gets old (more than 50 years) the tuning pins start to become loose in the pin block (a block of wood that is built into the piano). I will have some links at the bottom of this post with more information. You can typically get a full set of tuning pins for less than $100. Here I will show you how to do it yourself for a fraction of that price. If you have it done professionally, it will cost you a minimum of $1000 to have the entire piano re-pinned. This post will show you how to replace a tuning pin on your piano.
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