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Home›Repair guides›General Motors›Velocity Governor Sensitivity Adjustment

General Motors GMG-857 — Velocity Governor Sensitivity Adjustment

Adjustments

For the General Motors GMG-857, from the General Motors operator's manual.

Applies to: KEM GMG-857, General Motors 5.7L V8 (350 CID) engine

Before you start

  • Only in rare instances should the sensitivity adjustment be changed.

Procedure

  1. Remove the plug covering the sensitivity adjusting screw by drilling a 1/8 diameter hole and prying it out.
  2. If engine is too sensitive, turn the SENSITIVITY SCREW 1/4 turn clockwise and readjust the MAIN ADJUSTMENT.
  3. End each adjustment with a clockwise turn of the screw; repeat as needed.
  4. If engine speed drops excessively when loaded, turn SENSITIVITY SCREW 1/2 turn counter-clockwise, then 1/4 turn clockwise.
  5. Readjust MAIN ADJUSTMENT and repeat as needed.
  6. Seal the adjusting screws using HOOF SEAL KIT 200-940 or force silicone sealer into the cavity.

Specs & values

Full service-parts list: KEM GMG-857 →

Source: General Motors operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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