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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2 (ENGINE CONTROLS - ON-VEHICLE ADJUSTMENTS)VALVE CLEARANCE1.6L
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8
Valve Clearance: 1.6L
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION 1.6L
WARNING: This page is about a different car, the 2000 Chevrolet Tracker. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect negative battery cable. Remove rocker cover. Rotate crankshaft clockwise until alignment notch on crankshaft pulley is aligned with zero mark on timing belt cover. See Fig 1 .
- Ensure rocker arms of cylinder No. 1 are off respective cam lobes of camshaft. If they are not, rotate crankshaft clockwise one revolution (360 degrees) until alignment notch on crankshaft pulley is aligned with zero mark on timing belt cover.
- Using feeler gauge, measure clearance between camshaft and cam-riding face of rocker arm on valves No. 1, 2, 5 and 7. See Fig 2 . Adjust valve clearance if not within specification. See VALVE CLEARANCE SPECIFICATIONS table.
- Adjust valves by loosening lock nut and turning adjusting screw until correct clearance is obtained. Hold adjusting screw while tightening lock nut to 13 ft. lbs. (17 N.m) and recheck clearance.
- Rotate crankshaft clockwise one revolution (360 degrees). Measure clearance between camshaft and cam-riding face of rocker arm on valves No. 3, 4, 6 and 8. See Fig 2 . Adjust valve clearance if not within specification. See VALVE CLEARANCE SPECIFICATIONS table.
- Adjust valves by loosening lock nut and turning adjusting screw until correct clearance is obtained. Hold adjusting screw while tightening lock nut to 13 ft. lbs. (17 N.m) and recheck clearance. To install remaining components, reverse removal procedure.
VALVE CLEARANCE SPECIFICATIONS
| Application | In. (mm) | |
|---|---|---|
| Exhaust | ||
| Cold | .009-.011 (.23-.27) | |
| Hot | .011-.013 (.28-.32) | |
| Intake | ||
| Cold | .005-.007 (.13-.17) | |
| Hot | .007-.008 (.17-.21) | |
RENDER: 1.0x
NO RELATED
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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.