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Monday, April 2, 2012

Cylinder Head Replacing on Toyota Tacoma?


In this chapter it provides details regarding.
How to Replace cylinder head.How to install Toyota Tacoma cylinder head.
The cylinder head removal diagrams.The cylinder head removal for 1gr-FE Engine 2wd-Bank 1 & 2wd-Bank 2.
4.0L Cylinder head removal.



Removal & Installation



1gr-FE Engine
2wd-Bank 1

NOTE
The engine must first be removed from the vehicle.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Properly discharge the fuel system pressure.
  3. Properly disarm the SRS system.
  4. Disconnect the negative battery cable. Disconnect the positive battery cable. Remove the battery.
  5. Remove the hood subassembly.
  6. Remove the engine from the vehicle and position it in a suitable holding fixture.
  7. Remove the timing chain or belt cover subassembly.
  8. Remove the chain subassembly.
  9. Remove the number one cool inlet. Remove the front exhaust pipe assembly. Remove the three bolts and remove the exhaust manifold stay.
  10. Disconnect the air fuel ratio sensor connector. Remove the six nuts; remove the exhaust manifold and gasket.
  11. Disconnect the number one fuel pipe subassembly. Disconnect the number two fuel pipe subassembly.
  12. Disconnect the fuel injector connectors. Remove the ten intake manifold retaining bolts. Remove the intake manifold from the engine.
  13. Disconnect the engine coolant temperature sensor connector. Disconnect the heater hose. Remove the two bolts and four nuts, and then remove the water bypass joint RR and two gaskets. Remove the O-ring from the water outlet hose.
  14. While raising the chain tensioner number two, insert a 0.039 inch diameter pin, into the hole. Hold the hexagonal portion of the camshaft in place, using a wrench.
    NOTE
    Be careful not to damage the cylinder head and valve lifter with the wrench.
  15. Remove the two bolts. Remove the camshaft timing gear, camshaft timing gear assembly and timing chain number two.
    NOTE
    Do not disassemble the camshaft timing gear assembly.
  16. Remove the bolt and then remove the chain tensioner number two.
  17. Remove the camshafts.
  18. Remove the two bolts. Separate the two ground cables.
  19. Loosen the cylinder head retaining bolts in several steps and in the proper removal sequence. Remove the bolts.
    NOTE
    Be careful not to drop the washers into the cylinder head. Head warpage and cracking could result in removing the bolts in the wrong order.
  20. Lift the cylinder head from the dowels on the cylinder block and remove it from the engine. 

    image
    Fig. Bank 1 cylinder head bolt loosening sequence-4.0L engine


    image
    Fig. Cylinder head gasket sealant application-4.0L engine


    Click image to see an enlarged view
    Fig. Bank 1 cylinder head gasket positioning-4.0L engine


    Click image to see an enlarged view
    Fig. Bank 1 cylinder head bolt torque sequence-4.0L engine
To install:
  1. Before installing, thoroughly clean the gasket mating surfaces and check for warpage. Remove any old packing material. Be careful not to drop any oil on the contact surfaces of the cylinder head or engine block.
  2. Apply continuous beads of seal packing, part number 08826-00080 or equivalent, to the cylinder head gasket. Bead width should be 0.098-0.118 inch.
    NOTE
    Install the cylinder head gasket within three minutes after applying the seal packing. Install the cylinder head bolts within fifteen minutes after applying the seal packing.
  3. Be sure to position the cylinder head gasket on the engine block with the lot number stamp facing upward.
    NOTE
    Be sure that the head gasket is installed in the correct direction. Position the gasket gently in order to avoid damaging the gasket with the bottom part of the cylinder head.
  4. Apply a light coat of clean engine oil to the cylinder head bolts. Tighten the cylinder head bolts, in two successive steps, to specification and in the proper sequence.
    NOTE
    Replace defective bolts, as required.
  5. Continue the installation in the reverse of the removal procedure.
  6. Be sure to fill the cooling system with the proper grade and type engine coolant.
  7. Be sure to fill the engine oil with the proper grade and type oil.
    NOTE
    Do not fill the engine with oil for at least four hours after the cylinder head has been installed.
  8. Start the engine and check for leaks. Correct as required.
2wd-Bank 2

NOTE
The engine must first be removed from the vehicle.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Properly discharge the fuel system pressure.
  3. Properly disarm the SRS system.
  4. Disconnect the negative battery cable. Disconnect the positive battery cable. Remove the battery.
  5. Remove the hood subassembly.
  6. Remove the engine from the vehicle and position it in a suitable holding fixture.
  7. Remove the timing chain or belt cover subassembly.
  8. Remove the chain subassembly.
  9. Remove the number one cool inlet. Remove the number two front exhaust pipe assembly. Remove the three bolts and remove the exhaust manifold stay.
  10. Disconnect the air fuel ratio sensor connector. Remove the six nuts; remove the exhaust manifold and gasket.
  11. Disconnect the fuel injector connectors. Remove the ten intake manifold retaining bolts. Remove the intake manifold from the engine.
  12. Disconnect the engine coolant temperature sensor connector. Disconnect the heater hose. Remove the two bolts and four nuts, and then remove the water bypass joint RR and two gaskets. Remove the O-ring from the water outlet hose.
  13. Remove the two bolts and then remove the chain vibration damper number one.
  14. While pushing down on chain tensioner number two, insert a 0.039 inch diameter pin, into the hole. Hold the hexagonal portion of the camshaft in place, using a wrench.
    NOTE
    Be careful not to damage the cylinder head and valve lifter with the wrench.
  15. Remove the two bolts. Remove the camshaft timing gear, camshaft timing gear assembly and timing chain number two.
    NOTE
    Do not disassemble the camshaft timing gear assembly.
  16. Remove the bolt and then remove the chain tensioner number three.
  17. Remove the camshafts.
  18. Remove the two bolts. Separate the two ground cables.
  19. Loosen the cylinder head retaining bolts in several steps and in the proper removal sequence. Remove the bolts.
    NOTE
    Be careful not to drop the washers into the cylinder head. Head warpage and cracking could result in removing the bolts in the wrong order.
  20. Lift the cylinder head from the dowels on the cylinder block and remove it from the engine.
To install:
  1. Before installing, thoroughly clean the gasket mating surfaces and check for warpage. Remove any old packing material. Be careful not to drop any oil on the contact surfaces of the cylinder head or engine block.
  2. Apply continuous beads of seal packing, part number 08826-00080 or equivalent, to the cylinder head gasket. Bead width should be 0.098-0.118 inch.
    NOTE
    Install the cylinder head gasket within three minutes after applying the seal packing. Install the cylinder head bolts within fifteen minutes after applying the seal packing.
  3. Be sure to position the cylinder head gasket on the engine block with the lot number stamp facing upward.
    NOTE
    Be sure that the head gasket is installed in the correct direction. Position the gasket gently in order to avoid damaging the gasket with the bottom part of the cylinder head.
  4. Apply a light coat of clean engine oil to the cylinder head bolts. Tighten the cylinder head bolts, in two successive steps, to specification and in the proper sequence.
    NOTE
    Replace defective bolts, as required.
  5. Continue the installation in the reverse of the removal procedure.
  6. Be sure to fill the cooling system with the proper grade and type engine coolant.
  7. Be sure to fill the engine oil with the proper grade and type oil.
    NOTE
    Do not fill the engine with oil for at least four hours after the cylinder head has been installed.
  8. Start the engine and check for leaks. Correct as required.

    Click image to see an enlarged view
    Fig. Bank 2 recessed cylinder head bolt loosening sequence-4.0L engine


    Click image to see an enlarged view
    Fig. Bank 2 cylinder head bolt loosening sequence-4.0L engine


    Click image to see an enlarged view
    Fig. Bank 2 cylinder head gasket positioning-4.0L engine


    Click image to see an enlarged view
    Fig. Bank 2 Cylinder head bolt torque sequence-4.0L engine


    Click image to see an enlarged view
    Fig. Bank 2 recessed cylinder head bolt torque sequence-4.0L engine




These details will help.
Thanks.

FOR MORE HELP GO TO: ---

Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html


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