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Valve Clearance: Tacoma

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tacoma, 2002 Toyota RAV4, 2002 Toyota Prius, 2002 Toyota MR2, and 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove air cleaner hose along with upper cap on air cleaner and mass airflow meter. Remove intake air connector for access to valve cover. Intake air connector fits between air cleaner hose and throttle body.
  2. Disconnect electrical connectors at ignition coils mounted on top of valve cover. Remove bolts and ignition coils from valve cover. Disconnect engine wiring, clamps and PCV hose for access to valve cover. Remove bolts, seal washers, valve cover and gasket.
  3. Rotate crankshaft clockwise until crankshaft pulley timing mark (groove) aligns with "0" mark on timing chain cover and cylinder No. 1 is at TDC on compression stroke. Cylinder No. 1 is front cylinder at timing chain end of engine.
  4. Ensure 1-dot and 2-dot timing marks on camshaft sprockets are aligned. See Fig 1. 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 chain cover.
    Fig 1: Aligning Camshaft Sprocket Timing Marks (Tacoma)
    G00025448Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. With cylinder No. 1 at TDC on compression stroke, use feeler gauge to measure valve clearance between valve lifter and camshaft on specified valves. Perform STEP 1 in illustration. See Fig 2. Record valve clearance.
  6. To check remaining valves, rotate crankshaft clockwise one full revolution (360 degrees) and realign crankshaft pulley timing mark (groove) with "0" mark on timing chain cover. Using feeler gauge, measure valve clearance on specified valves. Perform STEP 2 in illustration. See Fig 2. Record valve clearance.
    Fig 2: Identifying Cylinder Numbers & Checking Valve Clearance (Tacoma)
    G98C11223Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Ensure valve clearance is within specification. See VALVE CLEARANCE SPECIFICATIONS (TACOMA)  table.
    VALVE CLEARANCE SPECIFICATIONS (TACOMA)

    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.
  8. If valve clearance requires adjustment, rotate crankshaft so camshaft lobe on valve to be adjusted is facing upward, away from valve lifter. Rotate valve lifter so notch on valve lifter is toward spark plug.
  9. Valve Clearance Adjuster (SST 09248-55040) is used to remove adjusting shim. Using SST "A" of valve clearance adjuster, press valve lifter downward. See Fig 3. Install SST "B" between camshaft and valve lifter with side marked with No. 9 at designated position. See Fig 3. Remove SST "A".
    Fig 3: Removing & Installing Valve Clearance Adjusting Shim (Tacoma)
    G94B46541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. Using small screwdriver and magnet, remove adjusting shim. Using micrometer, measure thickness of adjusting shim removed. Using thickness of used adjusting shim and measured clearance, 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 .0080" (.200 mm). For exhaust valves, "N" (new adjusting shim thickness) = "T" (used adjusting shim thickness) + "A" (measured clearance) minus .0120" (.300 mm). Adjusting shims are available in 17 sizes ranging from .0984" (2.500 mm) to .1299" (3.300 mm) in increments of .0020" (.050 mm). For adjusting shim selection charts, see Fig 4 and Fig 5 .
  11. Install replacement adjusting shim. Recheck valve clearance. To install remaining components, reverse removal procedure. Install and tighten ignition coil bolts to specification. See TORQUE SPECIFICATIONS .
Fig 4: Intake Valve Adjusting Shim Selection Chart (Tacoma)
G96D09511Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 5: Exhaust Valve Adjusting Shim Selection Chart (Tacoma)
G96F09512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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