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Torque Spec Sheet

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by iliakolesnikov, Oct 14, 2022.

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  1. iliakolesnikov

    iliakolesnikov New Member

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    Is there an all-in-one torque spec sheet anywhere for the Gen 3 Prius? Tried looking around but haven't been able to find anything of the sort. Any help would be appreciated, thanks!
     
  2. Elektroingenieur

    Elektroingenieur Senior Member

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    If there were, it would be many pages long: in the Repair Manual (more info) for model year 2010, for example, there are 46 separate “Torque Specifications” topics, under General: Specifications, each giving tightening torques for the fasteners of one system.

    Toyota does publish a two-page Service Data Sheet, but it’s not for models sold in the U.S., and the only torque specifications included are for the wheel nuts, engine oil filter and drain plug, and transaxle fill and drain plugs.
     
  3. Tombukt2

    Tombukt2 Senior Member

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    Look up a copy of the machinist handbook and you can get an idea of the proper torque for giving fasteners by their sizes and lengths and metallurgical makeup if you were so inclined that gives you a base idea kind of what you're looking for but I would think in the repair manual I thought in the older repair manuals there was just that like for the Corolla and trueno engine repair manual that I have sitting not far from me it's yellow about 180 pages maybe and there is a section in the back which lists the torque specs for giving number bolts or some kind of nonsense and it looks like it's by length and not really location so if you have this long of a bolt and it's this diameter and it's going to be this torque range.
     
  4. ChapmanF

    ChapmanF Senior Member

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    The repair manual does contain, as Elektroingenieur kindly noted, "torque specifications" topics, together under General Specifications. Those 46 topics glommed together would provide the wanted information. The same torque specifications also appear, individually, in later sections of the manual where they apply. And there's also a fall-back topic that explains the markings on Toyota's nuts and bolts for strength class, and gives generic torques for such-and-such bolt size and such-and-such strength class. *

    Those generic rules are only for use when there isn't a specific torque shown for an item. When there's a specific torque given, it can reflect many details of how that fastener is being used in that application. The generic fallback charts do not.

    Those front-matter topics might not be present in PDFs you might find on the web, if they were generated by people doing print-to-file from a TIS subscription and the people doing it weren't interested in those sections. Missing ones might have to be found by going to the source.

    Toyota Service Information and Where To Find It | PriusChat


    * I'm not sure if that generic topic is in the Gen 3 manual (it's missing in a PDF I'm looking at, but the person who made the PDF might just not have been interested in it). It's definitely present in my Gen 1 manual.
     
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  5. PriusCamper

    PriusCamper Senior Member

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    If someone can find a universal torque chart for fasteners based on type of steel harness and other details, that'd be a great resource. I've seen them mentioned before but have never been able to download one of them. But in general make sure they aren't too tight and not too loose and you got it!
     
  6. Elektroingenieur

    Elektroingenieur Senior Member

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    The “Specified Torque for Standard Bolts” topic (previously “Standard Bolt Tightening Torques”) has appeared in Toyota’s Repair Manual series for at least 50 years, and it’s in every authorized edition I’ve seen for Prius cars.
    Machinery’s Handbook, in the 30th edition on hand here, has sixteen pages on “Torque and Tension in Fasteners,” but not a convenient, generic table of tightening torques. These appear in many places, such as Chapter 2 (PDF) of the Tohnichi Torque Handbook; a two-page spread (PDF) in the Technical Data section of MISUMI’s catalog; and Fastenal’s poster (PDF).

    As @ChapmanF kindly points out, however, these are generic values, based on assumptions that may not always be true, rather than universal ones that can be used instead of manufacturers’ specific recommendations.
     
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  7. Tombukt2

    Tombukt2 Senior Member

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    Welp my machine is handbook is about 64 years old. But like new . Got it in class in goawd knows what year.handed down from another German off to work on the line at Pratt Whitney. I was just coming in system