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 MANUALSCHEVROLET1991R 30 P/U 2WD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSPECIFICATIONS
1991 Chevrolet R 30 P/U 2WD V8-350 5.7L
Spark Plug: Specifications
1991 Chevrolet R 30 P/U 2WD V8-350 5.7LSECTION Specifications
SPARK PLUG TYPE UPDATED BY TSB # 88-T-64
Spark Plug Gap 0.90 mm (0.035 inches)
Spark Plug Torque 20 Nm (15 lb. ft.)
Spark Plug Type AC R43TS
NOTE: Check the gap specifications given on the Emissions Control Label. If the gap is different from what is listed here, use the information on the label.
Spark Plug Gap 0.90 mm (0.035 inches)
Spark Plug Torque 20 Nm (15 lb. ft.)
Spark Plug Type AC R43TS
NOTE: Check the gap specifications given on the Emissions Control Label. If the gap is different from what is listed here, use the information on the label.
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.