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, 475/M40REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 33 (ENGINE CONTROLS - REMOVE/INSTALL/OVERHAUL)FUEL SYSTEM (DIESEL)INJECTION PUMPINSTALLATION
1987 Chevrolet Hi-Cube 6.2 J, 475/M40
Injection Pump: Installation
1987 Chevrolet Hi-Cube 6.2 J, 475/M40SECTION Installation
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Vandura Special, 1994 GMC Vandura, 1994 GMC Rally Camper Special, 1994 GMC Rally, and 1994 GMC Forward Control. However, it is still accessible from the selected car via links, so may be relevant.
- Install NEW injection pump gasket. Align locating pin on injection pump hub with slot in injection pump driven gear. At the same time, align injection pump timing marks. Ensure cylinder No. 1 is set at TDC.
- Attach injection pump to front cover. Ensure alignment marks made during removal are aligned. Tighten nuts. Attach pump to drive gear and tighten bolts. Reverse removal procedure to complete installation. Check injection pump timing. See INJECTION PUMP TIMING (DIESEL) in ADJUSTMENTS - 6.5L DIESEL article in the ENGINE PERFORMANCE section.
- Install NEW injection pump gasket. Align locating pin on injection pump hub with slot in injection pump driven gear while aligning injection pump timing marks.
- Attach injection pump to front cover. Ensure alignment marks made during removal are aligned. Tighten nuts. Attach pump to drive gear and tighten bolts. Reverse removal procedure to complete installation. Check injection pump timing. See INJECTION PUMP TIMING (DIESEL) in ADJUSTMENTS - 6.5L DIESEL article in the ENGINE PERFORMANCE section.
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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.