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.
Catalytic Converter LH: Installation
- Clean all exhaust connections before reassembly.
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NOTE: The following step is only required if the components are being replaced with new items:
Apply anti-seize to thread of sensor, using special tool install the catalyst monitor sensor and the HO2S. Install Special Service Tool: 303-476 (T94P-9472-A) Socket, Exhaust Gas Oxygen Sensor.
Material
: Motorcraft® High Temperature Nickel Anti-Seize Lubricant / XL-2
Torque
: 35 lb.ft (48 Nm)
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NOTE: Make sure that new nuts, gasket and the studs are installed.
To install, reverse the removal procedure.
- Check the exhaust system for leaks.
NO RELATED
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.