Duncan120@aol.com wrote:
>
> Martin:
> It is to prevent the alloy head (or any other head for that matter) from
> warping due to the uneven clamping force over one bolt/stud hole or another.
> When a fastener is removed one fastener at a time, the head "lifts" due to the
> clamping force being removed in that area by undoing in sequence, a little at
> a time, you lessen the chance of warpage.
>
> Ron
The 'tighten - loosen - tighten is a common practice at original
equipment manufacturers as well, with automatic torquing equipment being
programmed that way.
--
uncle jack
TR4 Rallye Replica vintage racer
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