Frontier 2WD L4-2.5L (QR25DE) (2005)
Exhaust Manifold: Service and Repair
EXHAUST MANIFOLD AND THREE WAY CATALYST
Removal and Installation
REMOVAL
1. Release fuel pressure. Refer to FUEL PRESSURE RELEASE.
2. Remove quick connector cap, and disconnect quick connector at the engine side. Refer to AIR CLEANER AND AIR DUCT.
3. Remove air duct, PCV hose (between air duct and rocker cover) and electric throttle control actuator. Refer to INTAKE MANIFOLD.
4. Disconnect harness connector of air fuel ratio sensor 1, and harness from bracket and middle clamp.
5. Remove air fuel ratio sensor 1 using Tool.
Tool number : KV10117100 (J-36471)
CAUTION:
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Be careful not to damage air fuel ratio sensor 1.
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Discard any air fuel ratio sensor 1 which has been dropped from a height of more than 0.5 mm (19.7 inch) onto a hard surface such as a
concrete floor; replace with a new one.
6. Remove exhaust front tube.
7. Remove exhaust manifold cover.
8. Remove bracket between exhaust manifold-three way catalyst assembly and transmission assembly