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 131 (ENGINE CONTROL SYSTEM - REMOVAL & INSTALLATION)IGNITION SYSTEMSSPARK PLUGINSTALLATION

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Spark Plug: Installation

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Installation

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Replace the spark plugs every 90,000 mi (144,000 km).

Set the spark plug gap. Bend only the side electrode if necessary. See SPARK PLUG TYPE and SPARK PLUG SPECIFICATIONS tables.

SPARK PLUG TYPE

Application	Spark Plug Type	Spark Plug No.
1.8L Except HO	Denso	SK20R11
- -	NGK	IFR6A11
1.8L HO	Denso	SR16R11
- -	NGK	IFR5A11

SPARK PLUG SPECIFICATIONS

Application

Gap - In. (mm)

Torque - Ft. Lbs. (N.m)

1.8L Except HO

⁽¹⁾ .040-.051 (1.02-1.30)

13 (18)

1.8L HO

⁽²⁾ .040-.043 (1.02-1.10)

18 (25)

⁽¹⁾	Maximum used spark plug gap - 0.051 in. (1.3 mm).

⁽²⁾	Maximum used spark plug gap - 0.047 in. (1.2 mm).

Install spark plugs. Tighten spark plugs as specified. See SPARK PLUG SPECIFICATIONS table.
Install ignition coils (3). See Figure .
Install ignition coil bolts (4). Tighten bolts to specification. See TORQUE SPECIFICATIONS .
Connect ignition coil harness connectors (1). See Figure .
Install engine cover (1). See Figure .
Install engine cover (1) bolts. Tighten bolts to specification. See TORQUE SPECIFICATIONS .

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.