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Rotating tires and getting the correct tightness without a torque wrench

Discussion in 'Gen 3 Prius Main Forum' started by Georgina Rudkus, Jul 11, 2020.

  1. Georgina Rudkus

    Georgina Rudkus Senior Member

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    tire rotation.JPG I did a tire rotation using my Rennstand safejacks.

    I've attached a photo to show the setup.

    I found that the key to getting the correct tightening torque could be had with a torque wrench.

    First, with the tire off the ground, while holding the tread, run down the lug nuts as tight as you can.

    Finally, with the car on the ground, tighten the lug nuts another 90 degrees.


    I examined the torque angle of the same lugs that were applied with a torque wrench with an angular torque gauge and found them to be within 5-10 degrees.
     
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  2. jzchen

    jzchen Newbie!

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    Sorry if I'm being anal, but you made a typo in the body of your post "with a torque wrench".

    moto g(7) power ?
     
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  3. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    One grey area:


    That could vary some. Maybe starting with just finger tight, the additional torque angle would be around 120 degrees? Just to throw out a number. That's sketchy too, because the wheels can be not quite seated against the hub. Maybe finger-tight them all, then grip the wheels at three and nine o'clock, give it a bit of shake, then double check the finger-tight.

    What's not bad too: wheel on the ground, just use the Toyota supplied wrench (with it's relatively short handle), and put some oomph into it. :ROFLMAO:
     
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  4. ChapmanF

    ChapmanF Senior Member

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    Take a pair of twenty-dollar bills and roll them into a slim tube. A little bit of tape at the ends can be used to keep them in the proper tubular shape.

    Then (wearing a mask), find somebody in the tools section at the hardware store and say "I will give you these rolled-up twenties for that torque wrench over there."
     
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  5. Johnny Cakes

    Johnny Cakes Senior Member

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    Excellent point. Your "as tight as you can" might be different from my "as tight as you can" but our "finger tight" would probably be more similar.
     
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  6. scdaf

    scdaf Junior Member

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    A perfectly usable and quite accurate 1/2" torque wrench is $19.99 at Harbor Freight if you somehow don't have a coupon for 20%- 25% off. Hard to imagine needing to guess.
     
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  7. RRxing

    RRxing Senior Member

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    And I'm sure that if you have the dealer rotate the tires, they will use a torque wrench within + or - 1 ft/lb from the required spec. :LOL:
     
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  8. sam spade 2

    sam spade 2 Senior Member

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    AND.....I am positive that they will NOT torque the lugs down with that uncalibrated air gun one at a time going around in a circle......which is a time honored way to warp the rotors. :eek:
     
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  9. Grit

    Grit Senior Member

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    I go to america's tires where I bought the tires from to take advantage of the perks that came with the purchase. I'm still waiting when they will actually torque the tire nuts to 78 - 80 FT LBS and adjust all 4 tire PSI to toyota door specs. When I get back home, I always get the torque wrench and air compressor out to correct their slop. I love leaving negative feedback and they call me to ask ask how can they do better next time HA! This was the 4th time that they screwed up tire job-wise on my car which I won't go into. 2 months ago, they drove my car into the lift and back to me with the parking brakes on. The loud screeching was coming from my car driving away, and when I got in the car, the brake light was lit up and the pedal was down.

    It's slowly coming together that I make time to rotate my own tires for now on.
     
    #9 Grit, Jul 11, 2020
    Last edited: Jul 11, 2020
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  10. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    I've lost count times of the times I've seen a costco guy do a final torque on a car outside, and go around the circle, no star pattern.

    One of the perks of having separate snow tires, I always buy tires when the wheels are OFF the car, bring them in and leave with loose wheels. No discount, but peace of mind that they'll get torqued right. And I dress the hubs with a thin application of anti-seize, check the tread over carefully for embedded metal, wash and wax the ones coming off.

    One tip when getting new tires: take the valve caps off just before handing over to the tire shop. Espeically if it involves costco's green caps.
     
  11. Georgina Rudkus

    Georgina Rudkus Senior Member

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    Be advised that many manufacturers now specify torque angle values for final tightening of engine head bolts as it is more accurate than "frictional" torque wrench values.

    Angular torque has the advantage of the equivalency of a micrometer, while frictional torque depends to the frictional value between rubbing surfaces which varies with the surface granular structure of the alloys of the internal and external threads as well as the contact surfaces between the lug nut and the lug nut washer.

    As for angular torque, once the sloppiness or backlash has been taken up by initial contact tightening, with a 1.5 thread pitch, one rotation will always stretch the stud or bolt by a tension length of 1.5 millimeters. That's "micrometer" accuracy.
     
    #11 Georgina Rudkus, Jul 11, 2020
    Last edited: Jul 11, 2020
  12. bettergolf

    bettergolf Active Member

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    I've always rotated my own tires when I change the oil (at least for the last 50 years. ...with a floor jack it takes about 20 minutes. I use a 4 way lug wrench, never owned a torque wrench. Never lost a wheel, never warped a rotor....and like another poster I take my tires/wheels to the shop to buy new ones so I'll be able to loosen the lug nuts when I'm ready to rotate them.
     
  13. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    I've always used a torque wrench, for wheel lug nuts. Still, I'd say finger-tight followed by some angular rotation makes a lot of sense. It is used by a lot of manufacturers, for oil filter install. Often with a torque value too, take your pick.
     
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  14. Grit

    Grit Senior Member

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    Even when your out on the road changing your own flat?
     
  15. ChapmanF

    ChapmanF Senior Member

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    The only tool normally in my car that the 21mm socket will fit on is the torque wrench....
     
  16. TMR-JWAP

    TMR-JWAP Senior Member

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    Are we really making it this complicated? holy crap.............
     
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  17. Georgina Rudkus

    Georgina Rudkus Senior Member

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    If you have read post by others, use of a torque wrench can rally cause damage. Individuals have set the torque wrench for foot lbs., when inch lbs. are specified. This has resulted in snapped or broken bolts.

    A good rule to apply is that, even with a torque wrench, if it swings more than after the bolt contacts with residtance180 degrees, something is wrong.

    Most mechanics do not use a torque wrench for anything but suspension or engine parts. Tightening no more than 180 degrees after turning resistance is felt is almost always sufficient.

    Sensing more than normal resistance means that the bolts have been cross threaded. Applying more turning force always always results in a broken bolt.
     
  18. hill

    hill High Fiber Member

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    Tire rotation. a non-essential with more and more cars. With the most, You can only rotate front to back anyways. And many new cars have different size from front treads to back ... so they stay in the same place during their entire life expectancy. Get yourself a new car, problem solved.

    not to mention blowing out the stud.
     
  19. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    No not then, just give it a good tighten with the supplied wrench. Typical scenario, it's a temp spare that'll be on for less than a day.
     
  20. ChapmanF

    ChapmanF Senior Member

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    Noaw, I just carry a bunch of other heavy stuff around in back. Leaving out the supplied lug wrench/pry bar doesn't save all that much weight, but it's something. A set of sockets that includes 21 mm and a cheap torque wrench are just more versatile to have around than one fixed-size lug wrench.