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.
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HOMESERVICE MANUALSCHEVROLET1987HI-CUBE 6.2 J, 400/M40REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 38 (SUSPENSION - FRONT)ADJUSTMENTS & CHECKINGBALL JOINT CHECKINGUPPER BALL JOINT
1987 Chevrolet Hi-Cube 6.2 J, 400/M40
Upper Ball Joint
1987 Chevrolet Hi-Cube 6.2 J, 400/M40SECTION Upper Ball Joint
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1987 GMC Safari, 1987 GMC S15 Pickup, 1987 GMC S15 Jimmy, 1987 GMC Cab & Chassis, and 1987 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
- Raise vehicle. Support with jack stands under lower control arms, as close as possible to each lower ball joint. Ensure upper control arm bumper does not contact frame. Place dial indicator against lower part of wheel rim. Push in on bottom of tire while pulling out at the top. Read gauge, then reverse push/pull procedure.
- Lateral (horizontal) deflection should not exceed .125" (3.18 mm). Disconnect ball joint from knuckle and check for any looseness. If any of these conditions exist, replace ball joint.
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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.