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 MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSERVICE PRECAUTIONSTECHNICIAN SAFETY INFORMATION
1991 Hyundai Sonata V6-3.0L
Technician Safety Information
1991 Hyundai Sonata V6-3.0LSECTION Technician Safety Information
1. Block the drive wheels, as a safety routine, before beginning any service with the vehicle on the ground.
2. Never work under a vehicle supported only by a jack. Use jackstands, on a flat and level hard surface, for safe support.
3. Always wear appropriate eye protection.
4. Use caution when working near the catalytic converter to prevent the possibility of burns. The temperatures within the converter can exceed 1000°F.
5. Ignition systems present a shock hazard; exercise care when performing spark test and always use non-conductive ignition wire pliers.
6. When servicing the fuel system observe the following cautions:
a. Put a "CAUTION: FLAMMABLE" sign in the workshop.
b. Be sure the shop is furnished with the proper fire extinguisher.
c. Be sure to disconnect battery ground cable before any service work is done.
d. Place a suitable container under the connection to be opened.
e. Slowly open fuel connections, allow pressure to escape, and catch spilled fuel in container.
NOTE: If available, use system bleed valve (schrader) to relieve pressure.
f. Disconnect line or hose, then plug all fittings.
g. Put any drained fuel in an explosive-proof container and put the lid on securely.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.