Valve Spring Installed Height

1987 Chevrolet Step Van P20, 7.4 W, Automatic, 475/M40SECTION Valve Spring Installed Height

Installed valve spring height must be checked whenever the springs are removed. See ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article. If installed height exceeds specifications, shim to meet specifications. See SPRING INSTALLED HEIGHT table.

SPRING INSTALLED HEIGHT SPECIFICATION

Application In. (mm)
5.0L & 5.7L 1.686-1.748 (42.82-44.39)
RENDER: 1.0x

NO RELATED

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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.