Cylinder Head Replacement


  1. REPLACE INTAKE VALVE GUIDE BUSH

  2. REPLACE EXHAUST VALVE GUIDE BUSH

  3. REPLACE TIGHT PLUG

  4. REPLACE RING PIN

Cylinder Head -- Replacement



1. REPLACE INTAKE VALVE GUIDE BUSH

  1. Gradually heat the cylinder head to approximately 80 to 100°C (176 to 212°F).



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Mechanical.Engine.Cylinder Head Replacement

  1. Using SST and a hammer, tap out the valve guide bush.

    SST
    09201-10000(09201-01080)
    09950-70010(09951-07100)

  1. Using a caliper gauge, measure the bush bore diameter of the cylinder head.

  1. Select a new guide bush.

    New Guide Bush:
    Item
    		Specified Conditions
    Bush Bore Diameter
    		13.004 to 13.025 mm (0.512 to 0.513 in.)
    		13.054 to 13.075 mm (0.514 to 0.515 in.)
    Bush to be Used
    		STD
    		O/S 0.05
    If the bush bore diameter of the cylinder head is more than 13.025 mm (0.513 in.), machine the bush bore to a dimension of 13.054 to 13.075 mm (0.514 to 0.515 in.).
    If the bush bore diameter of the cylinder head is more than 13.075 mm (0.515 in.), replace the cylinder head.

  1. Gradually heat the cylinder head to approximately 80 to 100°C (176 to 212°F).



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Mechanical.Engine.Cylinder Head Replacement

  1. Using SST and a hammer, tap in a new guide bush to the specified protrusion height.

    SST
    09950-70010(09951-07100)
    09201-10000(09201-01070)
    Standard protrusion height:
    10.8 to 11.2 mm (0.425 to 0.441 in.)
    Text in Illustration
    *1
    		Protrusion Height


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Mechanical.Engine.Cylinder Head Replacement

  1. Using a sharp 8.0 mm reamer, ream the guide bush to obtain the specified clearance (LandCruiser RM000001LND00EX_01_0008.html).

    Text in Illustration
    *1
    		Reamer


2. REPLACE EXHAUST VALVE GUIDE BUSH

  1. Gradually heat the cylinder head to approximately 80 to 100°C (176 to 212°F).



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Mechanical.Engine.Cylinder Head Replacement

  1. Using SST and a hammer, tap out the valve guide bush.

    SST
    09201-10000(09201-01080)
    09950-70010(09951-07100)

  1. Using a caliper gauge, measure the bush bore diameter of the cylinder head.

  1. Select a new guide bush.

    New Guide Bush:
    Item
    		Specified Conditions
    Bush Bore Diameter
    		13.004 to 13.025 mm (0.512 to 0.513 in.)
    		13.054 to 13.075 mm (0.514 to 0.515 in.)
    Bush to be Used
    		STD
    		O/S 0.05
    If the bush bore diameter of the cylinder head is more than 13.025 mm (0.513 in.), machine the bush bore to a dimension of 13.054 to 13.075 mm (0.514 to 0.515 in.).
    If the bush bore diameter of the cylinder head is more than 13.075 mm (0.515 in.), replace the cylinder head.

  1. Gradually heat the cylinder head to approximately 80 to 100°C (176 to 212°F).



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Mechanical.Engine.Cylinder Head Replacement

  1. Using SST and a hammer, tap in a new guide bush to the specified protrusion height.

    SST
    09950-70010(09951-07100)
    09201-10000(09201-01070)
    Standard protrusion height:
    10.8 mm to 11.2 mm (0.425 to 0.441 in.)
    Text in Illustration
    *1
    		Protrusion Height


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Mechanical.Engine.Cylinder Head Replacement

  1. Using a sharp 8.0 mm reamer, ream the guide bush to obtain the specified clearance (LandCruiser RM000001LND00EX_01_0009.html).

    Text in Illustration
    *1
    		Reamer


3. REPLACE TIGHT PLUG
NOTICE:
If coolant leaks from the tight plug or the plug is corroded, replace it.

  1. Apply adhesive to new tight plugs.

    Adhesive:
    Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent.


  1. Install the tight plugs as shown in the illustration.


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Mechanical.Engine.Cylinder Head Replacement


    Text in Illustration
    *a
    		Front Side
    		*b
    		Cylinder Head Cover Side
    *c
    		Rear Side
    		*d
    		Intake Manifold Side
    *e
    		Stops
    		-
    		-

  1. Using SST, tap in the 7 tight plugs labeled A.

    SST
    09950-60010(09951-00250)
    09950-70010(09951-07100)

  1. Using SST, tap in the tight plug labeled B.

    SST
    09950-60010(09951-00300)
    09950-70010(09951-07100)

  1. Using SST, tap in the 2 tight plugs labeled C.

    SST
    09950-60010(09951-00450)
    09950-70010(09951-07100)


4. REPLACE RING PIN
NOTICE:
It is not necessary to remove a ring pin unless it is being replaced.


  1. Using a plastic-faced hammer, tap in a new ring pin until it stops.


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Mechanical.Engine.Cylinder Head Replacement


    Text in Illustration
    *1
    		Height
    		*2
    		Diameter
    *a
    		Front Side
    		*b
    		Cylinder Head Cover Side
    *c
    		Until pin stop
    		-
    		-

    Standard Ring Pin:

    Item
    		Height
    		Diameter
    Ring pin
    		8 mm (0.315 in.)
    		11 mm (0.433 in.)