LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2024 >> RC 350 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (Engine Mechanical System (8AR-FTS) - Service Information) >> Cylinder Head >> Reassembly [10/2015 - ] >> Procedure

Reassembly [10/2015 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2024 Lexus RC 300, 2023 Lexus RC 300, 2022 Lexus RC 300, 2021 Lexus RC 300, and 2020 Lexus RC 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSTALL STUD BOLT 
    NOTE:

    If a stud bolt is deformed or its threads are damaged, replace it.

    1. Using E8 and E10 "TORX" socket wrenches, install the stud bolts.
      GTY638134Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a RH side *b LH Side
      *c Front Side *d 16.7 mm (0.657 in.)
      *e 51.7 mm (2.04 in.) *f 23 mm (0.906 in.)
      *g 15 mm (0.591 in.) *h 40 mm (1.57 in.)
      *i 26.5 mm (1.04 in.) or 22.5 mm (0.886 in.) *j 20 mm (0.787 in.)
      *k 50 mm (1.97 in.) or 46 mm (1.81 in.) *l 26 mm (1.02 in.)

      Stud Bolt (A) 

      Torque: 9.0 N*m (92 kgf*cm, 80 in.*lbf) 

      Stud Bolt (B), (C) 

      Torque: 22 N*m (224 kgf*cm, 16 ft.*lbf) 

  2. INSTALL NO. 1 STRAIGHT SCREW PLUG 
    NOTE:

    If coolant leaks from a No. 1 straight screw plug or the plug is corroded, replace it.

    1. Using a 14 mm hexagon wrench, install 6 new gaskets and the 6 No. 1 straight screw plugs.

      Torque: 135 N*m (1377 kgf*cm, 100 ft.*lbf) 

  3. INSTALL VALVE SPRING SEAT 
    1. Install the valve spring seats to the cylinder head sub-assembly.
  4. INSTALL VALVE STEM OIL SEAL 
    1. Apply a light coat of engine oil to new valve stem oil seals.
      GTY495995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Intake Side
      *b Exhaust Side
      *c Brown
      *d Gray
      *e "NOK" Mark
      NOTE:

      Make sure to install each valve stem oil seal to the correct side. Installing an intake valve stem oil seal to the exhaust side or installing an exhaust valve stem oil seal to the intake side can cause installation problems later.

      HINT: 

      The intake valve stem oil seals are brown and the exhaust valve stem oil seals are gray.

    2. Using SST, push in the intake valve stem oil seals and exhaust valve stem oil seals.
      GTY501623Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Correct
      *b Incorrect
      • SST: 09201-41020 
      NOTE:

      Failure to use SST will cause the valve stem oil seal to be damaged or improperly seated.

  5. INSTALL INTAKE VALVE 
    1. Sufficiently apply engine oil to the tip area of the intake valve shown in the illustration.
      GTY505968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 30 mm (1.18 in.) or more
    2. Install the intake valve, compression spring and valve spring retainer to the cylinder head sub-assembly.
      NOTE:
      • Install the same parts in the same combination to their original locations.
      • The compression spring has a different identification color for the intake side and exhaust side.

        Make sure to check the color before installation.

      • Use only type A or only type B compression springs. Do not mix type A and type B compression springs.

      HINT: 

      Type A and Type B can be distinguished by the paint mark of the intake side compression spring.

      GTY509608Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Identification Color
      (Type A: White)
      (Type B: Green)
      Upper Side
    3. Using SST, compress the compression spring and install the 8 valve spring retainer locks.
      GTY520674Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09202-70020 
      • SST: 09202-00021 
    4. Using a plastic hammer, lightly tap the intake valve stem tip to ensure a proper fit.
      NOTE:

      Be careful not to damage the valve spring retainer.

  6. INSTALL EXHAUST VALVE 
    1. Sufficiently apply engine oil to the tip area of the exhaust valve shown in the illustration.
      GTY500657Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 30 mm (1.18 in.) or more
    2. Install the exhaust valve, compression spring and valve spring retainer to the cylinder head sub-assembly.
      GTY509608Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Identification Color
      (Type A: Purple)
      (Type B: Light blue)
      Upper Side
      NOTE:
      • Install the same parts in the same combination to their original locations.
      • The compression spring has a different identification color for the intake side and exhaust side.

        Make sure to check the color before installation.

      • Use only type A or only type B compression springs. Do not mix type A and type B compression springs.

      HINT: 

      Type A and Type B can be distinguished by the paint mark of the exhaust side compression spring.

    3. Using SST, compress the compression spring and install the 8 valve spring retainer locks.
      GTY518530Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09202-70020 
      • SST: 09202-00021 
    4. Using a plastic hammer, lightly tap the exhaust valve stem tip to ensure a proper fit.
      NOTE:

      Be careful not to damage the valve spring retainer.

scientia non olet · About LEMON Manuals