Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1987CHEVY VAN G30, 5.7 K, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)STEERINGPOWER STEERINGSTEERING GEAR - POWEROVERHAULRACK/PISTON & WORMREASSEMBLY
1987 Chevrolet Chevy Van G30, 5.7 K, 400/M40
Rack/Piston & Worm: Reassembly
1987 Chevrolet Chevy Van G30, 5.7 K, 400/M40SECTION Reassembly
- Install "O" ring and piston ring onto rack/piston using care not to twist them. Install worm into rack/piston until worm is against piston shoulder. Install ball bearings into rack/piston while slowly rotating worm counterclockwise.NOTE: See RACK PISTON & WORM ASSEMBLY BALL BEARINGS for number of balls to be installed. BE SURE to install light and dark colored balls alternately, as Black balls are .0005" smaller than Silver balls.
- Install correct number of balls in ball guide. Bearings in guide must be in sequence with bearings in rack/piston. Hold balls in place with chassis lube. Place return ball guide assembly in position.
- Install clamp and tighten attaching bolts. Alternate light and dark colored balls when installing. See Fig 1 . Insert rack/piston arbor into rack/piston until it contacts worm. Maintain pressure on arbor, and back worm out of rack/piston. DO NOT allow ball bearings to drop out of circuits.
RACK PISTON & WORM ASSEMBLY BALL BEARINGS
| Application | Rack/Piston | Guide |
|---|---|---|
| All Models | 17 | 7 |
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.
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.