Installation [11/2021 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.

INSTALL EXHAUST MANIFOLD TO HEAD GASKET (for Bank 2)

Install a new exhaust manifold to head gasket to the cylinder head sub-assembly as shown in the illustration.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Front

INSTALL EXHAUST MANIFOLD SUB-ASSEMBLY RH (TWC: Front Catalyst)
1. Fig 1: Exhaust Manifold Sub-Assembly RH (TWC: Front Catalyst) Tightening Sequence
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Temporarily install the exhaust manifold sub-assembly RH (TWC: Front Catalyst) to the cylinder head sub-assembly with the 8 nuts.
2. Tighten the 8 nuts in the order shown in the illustration.
  Torque: 21 N.m (214 kgf/cm, 15 ft.lbf)
INSTALL NO. 1 EXHAUST MANIFOLD HEAT INSULATOR
1. Install the No. 1 exhaust manifold heat insulator to the exhaust manifold sub-assembly RH (TWC: Front Catalyst) with the 3 bolts.
  Torque: 10 N.m (102 kgf/cm, 7 ft.lbf)
INSTALL ENGINE OIL LEVEL DIPSTICK GUIDE
1. Apply a light coat of engine oil to a new O-ring.
2. Install the O-ring to the engine oil level dipstick guide.
3. Install the engine oil level dipstick guide with the bolt.
  Torque: 10 N.m (102 kgf/cm, 7 ft.lbf)
INSTALL ENGINE OIL LEVEL DIPSTICK
1. Install the engine oil level dipstick to the engine oil level dipstick guide.
INSTALL ENGINE UNDER COVER SUB-ASSEMBLY RH
Refer to PROCEDURE - Step 27

INSTALL EXHAUST MANIFOLD TO HEAD GASKET (for Bank 1)

Install a new exhaust manifold to head gasket to the cylinder head sub-assembly as shown in the illustration.

Front

INSTALL EXHAUST MANIFOLD SUB-ASSEMBLY LH (TWC: Front Catalyst)
1. Temporarily install the exhaust manifold sub-assembly LH (TWC: Front Catalyst) to the cylinder head sub-assembly with the 8 nuts.
  
  Fig 2: Exhaust Manifold Sub-Assembly LH (TWC: Front Catalyst) Tightening Sequence
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Tighten the 8 nuts in the order shown in the illustration.
  Torque: 21 N.m (214 kgf/cm, 15 ft.lbf)
INSTALL NO. 2 EXHAUST MANIFOLD HEAT INSULATOR
1. Install the No. 2 exhaust manifold heat insulator to the exhaust manifold sub-assembly LH (TWC: Front Catalyst) with the 3 bolts.
  Torque: 10 N.m (102 kgf/cm, 7 ft.lbf)
INSTALL ENGINE MOUNTING DAMPER
1. Install the engine mounting damper to the front No. 1 engine mount bracket with the bolt.
  Torque: 10 N.m (102 kgf/cm, 7 ft.lbf)
INSTALL AIR FUEL RATIO SENSOR
Refer to INSTALLATION [11/2021 - ]