This procedure covers the removal and replacement of the intermediate pipe (front exhaust pipe) on a 2012-2017 Toyota Camry with the 2.5L I4 engine, including disconnection from the catalytic converter and manifold.

Warnings

Tools required

Parts

• Intermediate pipe assembly × 1 — Use OEM specification
• Exhaust manifold gasket × 1 — Use OEM specification
• Intermediate pipe to catalytic converter gasket × 1 — Use OEM specification
• Exhaust flange nuts × 1 — M10 x 1.25 (set of 3)
• Catalytic converter flange bolts × 1 — M10 x 1.25 (set of 2)

Preparation

1. Park vehicle on level ground and apply parking brake. Place wheel chocks behind rear wheels.
2. Allow exhaust system to cool completely if engine has been running (minimum 30 minutes).
3. Raise front of vehicle and support securely on jack stands rated for vehicle weight.
4. Apply penetrating oil to all exhaust flange bolts and nuts, allow to soak while gathering tools.
5. Inspect intermediate pipe and surrounding components for damage or unusual wear patterns.

Procedure

1. 1

   Remove heat shields if equipped
   Locate any heat shields covering the intermediate pipe or exhaust manifold connection. Remove heat shield mounting bolts using 12mm socket. Set shields and hardware aside for reinstallation.
   Torque spec

   Heat Shield Bolts10 Nm (7 lb-ft)
2. 2

   Disconnect oxygen sensor if present
   If an oxygen sensor is mounted on the intermediate pipe, disconnect the electrical connector by pressing the release tab. Use a 22mm oxygen sensor socket to remove the sensor by rotating counterclockwise. Protect sensor from damage and keep connector away from exhaust components.
   ⚠Oxygen sensors are fragile. Do not drop or contaminate the sensor tip. Never apply anti-seize to the sensor body, only the threads during reinstallation.
   Torque spec

   O2 Sensor45 Nm (33 lb-ft)
3. 3

   Disconnect intermediate pipe from catalytic converter
   Locate the two-bolt flange connection between the intermediate pipe and catalytic converter. Using a 14mm socket, remove the two flange bolts while supporting the pipe weight. Separate the connection and remove the old gasket.
   Torque spec

   Exhaust Flange Bolts45 Nm (33 lb-ft)
4. 4

   Remove exhaust hanger support
   Locate the rubber exhaust hanger(s) supporting the intermediate pipe. Use a pry bar or exhaust hanger tool to carefully separate the pipe hanger rod from the rubber mount. Avoid tearing the rubber isolator.
5. 5

   Disconnect intermediate pipe from exhaust manifold
   Locate the three-stud flange connection at the exhaust manifold. Using a 14mm socket, remove the three flange nuts while supporting the pipe. The pipe may be stuck due to carbon buildup; gently tap with a rubber mallet if needed to break the seal.
   ⚠Exhaust manifold studs can break if excessive force is applied to seized nuts. If nuts will not turn after penetrating oil, apply heat carefully or use a nut splitter to avoid stud damage.
   Torque spec

   Exhaust Flange Bolts45 Nm (33 lb-ft)
6. 6

   Remove intermediate pipe assembly
   With all connections freed, carefully lower and remove the intermediate pipe from the vehicle. Maneuver around subframe and suspension components as needed. Remove and discard old gaskets from both flange surfaces.
7. 7

   Clean flange surfaces
   Use a wire brush to thoroughly clean both the exhaust manifold flange and catalytic converter flange surfaces. Remove all carbon deposits, old gasket material, and corrosion. Inspect manifold studs for damage or thread wear.
8. 8

   Install new intermediate pipe
   Position new gasket on exhaust manifold flange with any printed markings facing the manifold. Maneuver new intermediate pipe into position, aligning the forward flange with the manifold studs. Thread on new flange nuts finger-tight. Do not fully tighten yet.
9. 9

   Connect to catalytic converter
   Install new gasket at the catalytic converter connection. Align the intermediate pipe rear flange with the catalytic converter flange. Apply anti-seize to flange bolt threads and install bolts finger-tight. Ensure proper alignment before tightening.
10. 10

    Reconnect exhaust hanger
    Align the intermediate pipe hanger rod with the rubber mount. Use a pry bar or soapy water to aid installation. Ensure the pipe hangs level and is not under stress.
11. 11

    Torque exhaust manifold connection
    Apply anti-seize compound to the exhaust manifold stud threads. Using a torque wrench, tighten the three exhaust manifold flange nuts to specification in a criss-cross pattern to ensure even gasket compression.
    Torque spec

    Exhaust Flange Bolts45 Nm (33 lb-ft)
12. 12

    Torque catalytic converter connection
    Using a torque wrench, tighten the two catalytic converter flange bolts to specification. Alternate between bolts to ensure even gasket seating.
    Torque spec

    Exhaust Flange Bolts45 Nm (33 lb-ft)
13. 13

    Reinstall oxygen sensor if equipped
    Apply a thin coat of anti-seize compound to the oxygen sensor threads only, keeping compound away from the sensor tip. Thread sensor into intermediate pipe by hand, then tighten to specification using oxygen sensor socket. Reconnect electrical connector ensuring it clicks into place.
    Torque spec

    O2 Sensor45 Nm (33 lb-ft)
14. 14

    Reinstall heat shields
    Position heat shields over the intermediate pipe and exhaust manifold area. Install and torque heat shield bolts to specification. Ensure shields do not contact moving components or wiring.
    Torque spec

    Heat Shield Bolts10 Nm (7 lb-ft)

Reassembly

1. Verify all fasteners are tightened to proper torque specifications and no tools remain under vehicle.
2. Inspect all electrical connections and ensure oxygen sensor wiring is properly routed away from hot exhaust components.
3. Double-check that exhaust hangers are fully seated and the pipe is properly supported along its length.

Verification

• Lower vehicle from jack stands and remove wheel chocks.
• Start engine and allow to idle. Listen for exhaust leaks at both flange connections (hissing or ticking sounds indicate a leak).
• With engine at operating temperature, visually inspect all connections for signs of exhaust gas escaping.
• If equipped with oxygen sensor, verify no check engine light appears and monitor for fault codes related to oxygen sensor operation.
• Perform a short test drive and re-inspect all connections for leaks or loosening after thermal cycling.

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