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 MANUALSHYUNDAI1991SONATA V6-3.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSSPECIFICATIONS
1991 Hyundai Sonata V6-3.0L
Emission Control Systems: Specifications
1991 Hyundai Sonata V6-3.0LSECTION Specifications
TORQUE SPECIFICATIONS
Catalytic converter assembly to center exhaust pipe 15-25 Nm / 11-18 ft. lbs.
EGR temperature sensor 10-12 Nm / 7.3-8.6 ft. lbs.
EGR valve installation bolt 19-28 Nm / 14-20 ft. lbs.
Front exhaust pipe to catalytic converter assembly 40-60 Nm / 30-44 ft. lbs.
Oxygen sensor 39-49 Nm / 29-36 ft. lbs.
Thermo valve 20-40 Nm / 15-30 ft. lbs.
SEALANT SPECIFICATIONS
Thermo valve thread sealant 3M 4171 or equivalent
IDLE SPECIFICATIONS
Idle Speed 700 ± 100 rpm [1]
Idle Mixture Non-adjustable
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.