1985 Chevrolet Step Van P20, 6.2 J, StandardFACTORY OEM SERVICE PROCEDURE

Removal (Van)

  1. Disconnect negative battery cables. Remove engine cover and air cleaner. Disconnect necessary wires and hoses. Remove EGR/EPR switches.
  2. Remove crankcase depression regulator valve hoses from intake manifold. Remove rear A/C compressor bracket (if equipped).
  3. Remove fuel filter to intake manifold bracket. Remove vacuum pump. Place a rag or cover over hole to prevent foreign material from entering engine. Remove intake manifold bolts and fuel line clips. Remove intake manifold.
  4. Install screens in cylinder heads. Remove injection line clips at loom brackets. Raise vehicle (for left bank).
  5. Remove injection lines at injection nozzles. Lower vehicle. Remove lines at pump. Tag lines for reassembly reference. Cap open lines.
Factory Service Tools

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When to See a Mechanic

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

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

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