Toyota Supra JZA80

Cylinder head reassembly

  • Thoroughly clean all parts to be assembled.
  • Before installing the parts, apply fresh engine oil to all sliding and rotating surfaces.
  • Replace all gaskets and oil seals with new ones.
  1. Install heater union
    When using a new cylinder head, a new heater union must be installed.
    1. Apply adhesive to the end of the heater union as shown in the illustration.
      Part No. 08833-00070, THREE BOND 1324 or equivalent
    2. Using a wooden block and hammer, tap in a new heater union, leaving standard position protruding from the cylinder head.
      Standard protrusion:
      48 mm (1.89 in.)
  2. Install valves
    1. Install a new oil seal on the valve guide bushing.
    2. Install these parts:
      1. Valve
      2. Spring seat
      3. Valve spring
      4. Spring retainer
      Confirm the correct direction of the valve spring.
    3. Using SST, compress the valve spring and place the 2 keepers around the valve stem.
      SST 09202-70020 (09202-00010)
    4. Using a plastic-faced hammer, lightly tap the valve stem tip to ensure a proper fit.
  3. Install valve lifters and shims
    1. Install the valve lifter and shim.
    2. Check that the valve lifter rotates smoothly by hand.
  4. Install EGR cooler
    Install a new gasket and the EGR cooler with the 8 bolts.
    Torque: 8.8 N·m (90 kgf·cm, 78 in.·lbf)
  5. Install camshaft position sensors
    Install the gasket and sensor with the 2 bolts.
    Torque: 8.8 N·m (90 kgf·cm, 78 in.·lbf)
  6. Install engine hangers and ground strap
    Torque: 39 N·m (400 kgf·cm, 29 ft·lbf)
This guide is based on the book edition Toyota (RM502U, 1997)