Exhaust Manifold: Replacement

REMOVE ENGINE ASSY (See REPLACEMENT )
Bank 1 sensor 1, bank 2 sensor 1: REMOVE HEATED OXYGEN SENSOR
REMOVE EXHAUST MANIFOLD HEAT INSULATOR NO.1
1. Remove the 4 bolts and insulator.
REMOVE EXHAUST MANIFOLD HEAT INSULATOR NO.2
1. Remove the 4 bolts and insulator.
REMOVE EXHAUST MANIFOLD SUB-ASSY RH
1. Remove the 8 nuts, manifold and gasket.
REMOVE EXHAUST MANIFOLD SUB-ASSY LH
1. Remove the 8 nuts, manifold and gasket.
INSPECT EXHAUST MANIFOLD SUB-ASSY RH
1. Using a precision straight edge and feeler gauge, measure the exhaust manifold's cylinder head contact surface for warpage.
  Maximum warpage: 0.50 mm (0.0197 in.)
  
  If the warpage is greater than the maximum, replace the manifold.
  
  Fig 1: Inspecting Exhaust Manifold Sub-Assy RH
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT EXHAUST MANIFOLD SUB-ASSY LH
HINT:

Use the same procedures described for RH side.
INSTALL EXHAUST MANIFOLD SUB-ASSY LH
1. Place a new gasket on the cylinder head with the white mark facing the manifold side.
  NOTE: Be careful of the installation direction.
  
  Fig 2: Placing New Gasket On Cylinder Head With White Mark Facing Manifold Side
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Install the exhaust manifold with the 8 nuts. Uniformly tighten the nuts in several passes.
  Torque: 44 N.m (449 kgf.cm, 32 ft.lbf)
  
  Fig 3: Installing Exhaust Manifold Nuts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL EXHAUST MANIFOLD SUB-ASSY RH
HINT:

Use the same procedures described for LH side.
INSTALL EXHAUST MANIFOLD HEAT INSULATOR NO.2
1. Install the insulator with the 4 bolts.
  Torque: 7.5 N.m (76 kgf.cm, 66 in.lbf)
INSTALL EXHAUST MANIFOLD HEAT INSULATOR NO.1
1. Install the insulator with the 4 bolts.
  Torque: 7.5 N.m (76 kgf.cm, 66 in.lbf)
Bank 1 sensor 1, bank 2 sensor 1:
INSTALL HEATED OXYGEN SENSOR

Torque: 44 N.m (449 kgf.cm, 32 ft.lbf)
INSTALL ENGINE ASSY (See REPLACEMENT )