1985 Buick Skylark Custom, 2.8 W, StandardFACTORY OEM SERVICE PROCEDURE

Valve Spring Specifications

VALVE SPRING SPECIFICATIONS

Application In. (mm)
Free Length 2.08 (52.8)
Pressure (1)
Valve Closed 78-86 @ 1.66 (35-39 @ 42.20)
Valve Open 122-180 @ 1.25 (55-82 @ 31.85)
(1) Lbs. @ In. (Kg @ mm).
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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