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It has been many years since I was shop foreman in an automotive machine shop (back in '79-'82). It realy depends on the year and make of the engine, it's design and/or configuration, what all else if anything is to be done. Just the boring process was 25$ for the first cylinder and $5 per cylinder after that (that covered the setup time), that is if you were buying the pistons and other parts for rebuilding the engine from the shop. The price went to $35 for first cylinder plus, $8 per next cylinder if you were buying parts elsewhere. However, we would not bore a dirty block... a block that was not hot-tanked or boiled out to remove all oil and sludge. We did not like to mess with oil and sludge getting all over our Rottler boring bar! Hot tanking the block and/or heads was extra. There was also a fee for "finish honing" the cylinders. The boring bar will cut the cylinder to within .0015 to .002 of finished size, but the finish honing brought it to the proper specs and put the proper cross-hatch on the cylinder walls. Then there was the matter of fitting the pistons to the rods. Installing press-fit pins or installing wrist pin bushings and honing them to specs. That was extra and should be done by a qualified machinist. But there were people that wanted to do that themselves sometimes. Then we charged extra to correct their mistakes. As for how many hours... it depends! How long does it physically take to bore 4 cylinders (using a quality stationary boring bar, and not including honing), about 30 minutes. How much time will it take for the shop that you are referring to... who knows! If it is a quality automotive machine shop... they should shoot you a flat price (not hourly) and then you should get a quote from them IN WRITING explaining all the obligations of the shop... for that flat rate! Good luck, and let us know what you find out!
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