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Thread: Torque wrench with 1/4" to 3/8" adapter

  1. #1
    Registered User bobframe's Avatar
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    Torque wrench with 1/4" to 3/8" adapter

    I need to use my 1/4" torque wrench in a situation that requires 11Nm of torque. My wrench's range is from 6-32Nm...so it is my preferred tool since my 3/8" torque wrench's dial begins at 20Nm. I am using it to tighten an oil filter and the oil filter wrench requires either a 3/8" square drive or a 19mm socket, which I only have in 3/8". However, I do have a 1/4" to 3/8" adapter that would allow me to use the 1/4" torque wrench.

    Anyone see a problem using a 1/4" torque wrench with such an adapter? Obviously the parts all connect and work...but any reason to doubt the wrench's accuracy with such a setup?

    Thanks!
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    Registered User wyman.winn's Avatar
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    use the adapter..no issues from my point of view....

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    Small road corner junkie pffog's Avatar
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    it will not effect the accuracy at all, torque is torque.
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    Registered User bobframe's Avatar
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    Thanks guys!
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    There is a shade tree method to that one though, I think, and check on this, 1.25 turns after first contact?

    There is a conversion, I think, if an extension is used though, not much, iirc, though

    anyone ever have the wrench re calibrated?

    Sounds like you have the two wrenches I have, a Craftsman and a Harbor Freight

  6. #6
    MOA #24991 Pauls1150's Avatar
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    As long as the adapter (whether it's a "reducer" or "enlarger" for the square drive) is on the same axis as the drive and the socket, there is no issue.
    It's only when the adapter is offset, or "lengthening", that you need to recalculate the torque value (desired vs. actual applied).

    Oil filters aren't "critical" as to torque (well, at least not for 1100/1150s)... wet the O-ring seal, snug 'er down, firm enough to make sure you'll get a good seal but not so tight that it'll give you grief next time you take it off. And always make sure that the old seal came out with the old filter.

  7. #7
    Mars needs women! 35634's Avatar
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    good rule of thumb with oil filters is 1/3 turn after it stops spinning freely.
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    Quote Originally Posted by 35634 View Post
    good rule of thumb with oil filters is 1/3 turn after it stops spinning freely.
    Sorry there is no rule!

    How much to tighten after the gasket has made contact with the base can and will vary depending mostly on the gasket selected by the filter manufacturer. The gasket will vary in hardness, thickness and shape.

    The best rule is to follow the indication on the fillter, Mann & Hummel oil filter for my RT is a MW75 and it is indicated +3/4 turns after the gasket has made contact with the base.

    Here is some more information on Installation Instructions for Spin-On filters from The Filter Manufacturers Council

    http://www.aftermarketsuppliers.org/...ish/93-3R1.pdf

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    Egad- this is as bad as an oil thread.

    My first thought about reaching for a torque wrench to put on an oil filter is to to think about getting someone else with more experience to do the work, before something gets broken.

    There are only two things that matter when putting a filter on- get it tight enough not to leak and don't be dumb enough to strip a thread or get it so tight you need a breaker bar to get it off. Needing a torque wrench to do that suggest the need to pay better attention to Dirty Harry's line " a man has got to know his limitations"

    If you can put the lid on a jar of pickles and not have it leak, a filter is easy...

  10. #10
    Registered User wyman.winn's Avatar
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    +1

    Quote Originally Posted by racer7 View Post
    Egad- this is as bad as an oil thread.

    My first thought about reaching for a torque wrench to put on an oil filter is to to think about getting someone else with more experience to do the work, before something gets broken.

    There are only two things that matter when putting a filter on- get it tight enough not to leak and don't be dumb enough to strip a thread or get it so tight you need a breaker bar to get it off. Needing a torque wrench to do that suggest the need to pay better attention to Dirty Harry's line " a man has got to know his limitations"

    If you can put the lid on a jar of pickles and not have it leak, a filter is easy...
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  11. #11
    MOA #24991 Pauls1150's Avatar
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    Consider that the gasket is a big fat squishy rubber ring, then add that it is oiled prior to installation...
    There is going to be a range in which it will seal properly, but not damage anything.
    I have to think that the "spec" is in reality (oh my gosh) actually a strong guideline for "This is about what it ought to feel like."

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    Administrator 20774's Avatar
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    Quote Originally Posted by JayElDee View Post
    There is a shade tree method to that one though, I think, and check on this, 1.25 turns after first contact?

    There is a conversion, I think, if an extension is used though, not much, iirc, though
    I hope this was tongue in cheek! There is a difference between an adapter and an extension. Use of an adapter...no problem...because the effective length of the torque wrench didn't change. An extension may or may not change the effective length of the torque wrench. If it did change the length, then some math will be needed.
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  13. #13
    Registered User k100lt's Avatar
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    If my filter is leaking how will I know
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    Registered User mpmarty's Avatar
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    Quote Originally Posted by k100lt View Post
    If my filter is leaking how will I know
    That depends on if it leaks internally or externally.
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    A bozo on the bus deilenberger's Avatar
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    Quote Originally Posted by mpmarty View Post
    That depends on if it leaks internally or externally.
    Since he owns a K brick (where the filter lives in the oil sump) I suspect this was a tongue in cheek comment..
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