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By DANIEL TINDER - 16 Years Ago
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Re: the other "head gasket" thread, I assume the way you calibrate a wrench involves sending back to the manufacturer?
My large 150# torque wrench was an asian cheepo, bought originally to install wheels. Likely, when engine assembly starts, I had better just buy a good one? Do quality tools usually come with an accurate calibration? How can you be sure?
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By Ol'ford nut - 16 Years Ago
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Quality torgue wrenches do. If you want to check one try it against another one. I've had mine for years and have checked it a couple of times, always been right one. It is the clicker type so if you get one remember to turn it back to zero when your done using it.
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By DANIEL TINDER - 16 Years Ago
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Seems like comparing torque wrenches could get tricky, since recommendation for accurate torque involves bring the wrench tight in one smooth motion? A single "click" on an already tight bolt would assure min. torque only? Or am I nit-picking?
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By Ol'ford nut - 16 Years Ago
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Not sure what you mean by 1 click and minimum torque. If anything it should be torque not min or max. You are correct in saying one smooth pull to desired torque (click). Tell you what, stop by your local auto machine shop and ask them how they check their own wrench. I've seen very few that have a true torque wrench calibration unit, many never check and most say they check against new wrench.
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By Doug T - 16 Years Ago
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A bending beam type torque wrench can not go out of calibration as long as the indicator bar is set at zero. (OK it can if the bending bar itself is damaged by a permanent deformation or heating otherwise they are extremely reliable). You can use a bending beam type to calabrate a click type. Set the click at a low and high values and check against the bending beam.
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