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 MANUALSCHEVROLET1985FORWARD CONTROL 6.2 J, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEADJUSTMENTTUNE-UP - DIESELADJUSTMENTSINJECTION PUMP TIMING2.2L
1985 Chevrolet Forward Control 6.2 J, Standard
Injection Pump Timing: 2.2L
1985 Chevrolet Forward Control 6.2 J, StandardSECTION 2.2L
- Check that notched line on injection pump flange is in alignment with notched line on injection pump front bracket. Bring No. 1 piston to TDC of compression stroke.
- Remove upper fan shroud. Check that timing belt is properly tensioned and that timing marks are aligned. If not, remove belt and readjust. Remove injection lines and remove distributor head screw and washer.
- Install dial indicator (J-29763) and set lift to 0.04" (1 mm) from plunger. Bring piston in No. 1 cylinder to a point 45-60° BTDC by turning crankshaft. See Fig 1 . Calibrate dial indicator to zero.
- Turn crankshaft pulley slightly in both directions and check that gauge indication is stable. Turn crankshaft in normal direction of rotation and take reading when timing mark on crankshaft pulley is aligned with pointer.
- Dial indicator should read .020" (0.5 mm). If reading is not as specified, hold crankshaft in place (15° BTDC) and loosen 2 nuts on injection pump flange.
- Move injection pump to a point where dial indicator reading is .020" (0.5 mm) and tighten pump flange nuts. Recheck dial indicator reading and readjust if necessary.
- Install distributor screw and washer into injection pump. Install injection lines. Connect wires and hoses previously removed. Install upper dust cover. Install timing belt, if removed. Install fan shroud. Adjust engine idle speed and fast idle speed.
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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.