Peugeot RE: Angle measuring on head bolt refitting

From: Schwartz, Barry D [AMSTA-AR-CCF] (barry.schwartz@us.army.mil)
Date: Tue 26 Nov 2002 - 08:48:50 EST

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    Matt,
    A lot of companies are specifying torque plus angle for fasteners where it
    is desirable to tightly control claming force. The angle is enough to get
    between the yield point and ultimate strength of the bolt. (In other words,
    it will cause permanent deformation of the bolt, but will not break it.) In
    this plastic zone, a little more or less turn of the bolt is not nearly as
    critical as it was prior to yield. I've just eyeballed the angle in the
    past. Yes, it is probably best to use the right tool. If you are just
    doing this once you should be able to fabricate something out of cardboard
    and tape to get close enough. What is important is if you overshoot, leave
    it be. Don't loosen it and start over. If you do, you should be getting a
    new bolt. This goes for the bolts you took out, as well. They should all
    be discarded and replaced.
    Barry

    -----Original Message-----
    From: Matthew Gaffney [mailto:mrgaffney@yahoo.com]
    Sent: Tuesday, November 26, 2002 6:52 AM
    To: peugeot-L@yahoogroups.com
    Subject: Angle measuring on head bolt refitting

    Hi all I need a bit of advice.

    I have a lovely 405 GLXDT (GRDT outside of UK) which
    unfortunately developped a head gasket problem. I took
    the head off and followed the Haynes instructions as
    to changing the gasket no problem. However the angular
    phase on the head bolt refitting caused me a problem
    as I cant seem to find any proper angular measuring
    equipment. I live in France and they hardly even know
    of torque wrenches here let alone angluar wrenches.

    Anyone know where I can find one that wont break the
    bank?

    Cheers muchly in advance

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