Valve Lifters Specifications

1985 Chevrolet Sportvan G30, 6.2 J, 475/M40SECTION Valve Lifters Specifications
WARNING: This page does not describe the selected car, but rather 20 other vehicles, including the 1994 GMC Yukon, 1994 GMC Vandura Special, 1994 GMC Vandura, 1994 GMC Suburban, and 1994 GMC Rally Camper Special. However, it is still accessible from the selected car via links, so may be relevant.
VALVE LIFTERS SPECIFICATIONS

Application In. (mm)
Bore Diameter
Standard .923-.924 (23.45-23.47)
Oversize .933-.934 (23.70-23.72)
Lifter Diameter
Standard .921-.922 (23.39-23.41)
Oversize .931-.932 (23.64-23.66)
Oil Clearance (1) .0016-.0031 (.040-.080)
(1) Oversized lifter can be used to replace standard lifter if resulting clearance is within specification.
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.