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Which torque sequence applies to a differential cover?

  • A.Progressively in a diagonal pattern
  • B.One bolt at a time to full torque, working around the cover so that each is completed before the next is started
  • C.In any order
  • D.Starting at the lowest point and working upward on both sides, so that the sealant is squeezed towards the top

Answer: A

Tightening a little at a time in a diagonal sequence pulls the cover down evenly and avoids distorting the flange. The same principle applies to any flange clamped by several fasteners. Uneven tightening is the commonest cause of a leaking cover. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. Naming what changes and what stays the same is the reliable route through questions of this shape.

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