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Thread: Correct Tool to retorque Head bolts

  1. #1
    Registered User jedwards's Avatar
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    Oct 2015
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    Correct Tool to retorque Head bolts

    Gentlemen,
    My apologies in advance for what will seem to many, to be a really dumb question.

    I need to retorque my head bolts now that I have travelled 100 miles on my recently rebuilt engine. As I dont have the right sized allen key socket for this job, I need to go shopping to get one.

    The Head bolts are M8, so is the correct tool called an M8 Alan Key socket, or is the correct one sized to the the diagonal width of the hex recess?

    In other words, does an M8 Alan Socket fit an M8 Socket Head Bolt?

    regards
    Jeff

  2. #2
    Registered User ejboyd5's Avatar
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    Feb 2005
    Location
    Southold, NY
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    326

    Re: Correct Tool to retorque Head bolts

    Best to get a metric Allen Bit Socket set. They are cheap enough and eventually you will use most of them.

  3. #3
    David Killion PappaWheelie's Avatar
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    Oct 2019
    Location
    Ludington MI
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    8

    Re: Correct Tool to retorque Head bolts

    Hi Jeff,

    Per https://www.engineersedge.com/hardwa...rews_14054.htm an M8 SHCS takes a 6mm hex driver.

    ejboyd5 is right, a set of hex drivers (socket bits) is cheap and useful. You NEED one.

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