LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Engine Controls - On-Vehicle Adjustments - V6 & V8) >> Engine Mechanical >> V8 Valve Clearance >> Land Cruiser, Sequoia & Tundra

Land Cruiser, Sequoia & Tundra

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sienna, 2002 Toyota Sequoia, and 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. On Land Cruiser, remove intake manifold cover located on top of engine, above intake manifold. Drain cooling system if any coolant hoses must be disconnected for access to valve covers. On Sequoia and Tundra, remove throttle body cover located above throttle body.
  2. On all models, remove air cleaner assembly with air intake hose that goes to throttle body. Remove bolts/nuts and upper timing belt cover from front of each cylinder head at each camshaft. Disconnect electrical connector at each ignition coil. Remove retaining bolts and ignition coils from valve covers.
  3. Remove transmission oil dipstick. Disconnect necessary hoses and engine wiring brackets for access to valve covers. Remove bolts, seal washers, valve covers and gaskets.
  4. Rotate crankshaft pulley clockwise (viewed from front of engine) so crankshaft pulley timing mark (groove) aligns with "0" mark on lower timing belt cover and cylinder No. 1 is at TDC on compression stroke. Cylinder No. 1 is front cylinder on left side of engine when viewed from flywheel end of engine. See Fig 1.
  5. Ensure timing marks on camshaft sprockets align with timing marks on timing belt rear plate. See Fig 2. If timing marks are not aligned, rotate crankshaft clockwise one full revolution (360 degrees) and realign crankshaft pulley timing mark (groove) with "0" mark on timing belt cover.
    Fig 1: Identifying Cylinder Numbers & Valve Arrangement (Land Cruiser, Sequoia & Tundra V8)
    G98G11201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Aligning Timing Marks (Land Cruiser, Sequoia & Tundra V8)
    G98H11202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Using feeler gauge, measure valve clearance between valve lifter and camshaft on intake valves on cylinders No. 1, 2, 5, 7 and 8, and exhaust valves on cylinders No. 1, 4 and 8. Perform STEP 1 in illustration. See Fig 1. Record valve clearance.
  7. Rotate crankshaft pulley clockwise one full revolution (360 degrees). Using feeler gauge, measure valve clearance between valve lifter and camshaft on intake valves on cylinders No. 3, 4 and 6, and exhaust valves on cylinders No. 2, 3, 5, 6 and 7. Perform STEP 2 in illustration. See Fig 1. Record valve clearance.
  8. Ensure valve clearance is within specification. See VALVE CLEARANCE SPECIFICATIONS (LAND CRUISER, SEQUOIA & TUNDRA V8)  table.
    VALVE CLEARANCE SPECIFICATIONS (LAND CRUISER, SEQUOIA & TUNDRA V8)

    Application (1) In. (mm)
    Intake .006-.010 (.15-.25)
    Exhaust .010-.014 (.25-.35)
    (1) Adjust valve clearance with engine cold. Verify valve clearance listed with valve clearance listed on underhood label (if available). If valve clearance on underhood label differs from valve clearance listed, use specification on underhood label.
  9. If valve clearance adjustment is required, adjusting shim between valve lifter and valve stem must be changed. To remove valve lifter, remove timing belt and camshafts. See appropriate article in ENGINES.
  10. Remove valve lifter and adjusting shim from valve. Using micrometer, measure thickness of adjusting shim removed. Using measured clearance and adjusting shim thickness, determine correct thickness of adjusting shim to be used for proper valve by using the follow equation, or using adjusting shim selection charts. For intake valves, "N" (new adjusting shim thickness) = "T" (used adjusting shim thickness) + "A" (measured clearance) minus .008" (.20 mm). For exhaust valves, "N" (new adjusting shim thickness) = "T" (used adjusting shim thickness) + "A" (measured clearance) minus .012" (.30 mm). Adjusting shims are available in 41 sizes ranging from .0787" (2.000 mm) to .1102" (2.800 mm) in increments of .0008" (.020 mm). For adjusting shim selection charts, see Fig 4 and Fig 5 .
  11. Install adjusting shim, valve lifter, camshafts and timing belt. Recheck valve clearance. Before installing valve covers and gaskets, apply sealant at specified areas on cylinder head. See Fig 3. Install gasket, valve cover, seal washers and valve cover bolts. Install and tighten valve cover bolts to specification in several steps. See TORQUE SPECIFICATIONS .
  12. To install remaining components, reverse removal procedure. Tighten bolts/nuts to specification. See TORQUE SPECIFICATIONS . Fill cooling system if drained.
    Fig 3: Identifying Valve Cover Sealant Application Areas (Land Cruiser, Sequoia & Tundra V8)
    G98A11205Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Intake Valve Adjusting Shim Selection Chart (Land Cruiser, Sequoia & Tundra V8)
    G98J11204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Exhaust Valve Adjusting Shim Selection Chart (Land Cruiser, Sequoia & Tundra V8)
    G98I11203Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals