SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPONTIAC1991FIREBIRD FORMULA, 5.0 F, STANDARD, M39REPAIR AND DIAGNOSIS (SINGLE PAGE)STEERINGPOWER STEERINGSTEERING GEAR - POWEROVERHAULPOWER STEERING PUMPREASSEMBLY
1991 Pontiac Firebird Formula, 5.0 F, Standard, M39

Power Steering Pump: Reassembly

1991 Pontiac Firebird Formula, 5.0 F, Standard, M39SECTION Reassembly
  1. Lubricate all "O" ring seals and seal areas with power steering fluid. Place pump housing on flat surface. Drive new shaft seal into bore using Shaft Oil Seal Installer (J-22670) until seal bottoms on shoulder. DO NOT  use excessive force as seal can be distorted.
  2. Clamp pump housing in vise with shaft down. Install end cover and pressure plate "O" rings in grooves in pump cavity. With drive shaft clamped, splined shaft up, install thrust plate on drive shaft with ported side up. See Fig 1 .
    Fig 1: Installing Thrust Plate
    G27165Courtesy of GENERAL MOTORS CORP.
  3. Slide rotor over splines with counterbore of rotor facing down. Install rotor lock ring. Insert both dowel pins in holes of pump cavity. Rotor must move freely on splines. Install drive shaft assembly into pump body, ensuring dowel pins are properly engaged in thrust plate.
  4. Slide cam ring over rotor on dowel pins with arrow facing up. See Fig 2 . Install 10 vanes in rotor slots. Position pressure plate on dowel pins with plate spring groove facing upward. Place a 1 1/4" socket in groove of pressure plate. Seat entire assembly on "O" ring in pump cavity by pressing down with both thumbs.
    Fig 2: Installing Cam Ring
    G90G09999Courtesy of GENERAL MOTORS CORP.
  5. Place pressure plate spring into groove in pressure plate. Position end cover lip edge up over spring. Press end cover down below retainer ring groove with thumb. Install retainer ring. Ensure ring is seated in groove. Use care to avoid cocking end cover in bore or distorting assembly.
  6. Install flow control valve (if previously removed) in pump bore with control valve spring and hex end of valve facing interior of bore. Using a punch, tap retainer ring end around groove until opening is opposite flow control valve bore. This is important for maximum retention of retainer ring.
  7. Replace reservoir "O" ring seal, 2 mounting stud "O" ring seals and flow control valve "O" ring seal on pump housing. Carefully position reservoir on pump housing. Visually align mounting stud holes until studs can be started into threads.
  8. Press reservoir down on pump to seat on pump housing. Place new seal onto union bolt. Install union bolt in flow control valve bore. Tighten mounting studs. Install pump pulley.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

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

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.