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HOMESERVICE MANUALSNISSAN-DATSUN2003FRONTIER BASE, STANDARDREPAIR AND DIAGNOSISENGINE MECHANICALENGINE MECHANICAL (KA24DE)TIMING CHAINREMOVALUPPER TIMING CHAIN
2003 Nissan-Datsun Frontier Base, Standard

Upper Timing Chain

2003 Nissan-Datsun Frontier Base, StandardSECTION Upper Timing Chain
  1. Remove the air cleaner assembly.
  2. Remove the spark plug wires.
  3. Set No. 1 piston at TDC on its compression stroke.
    Fig 1: Identifying No. 1 Piston At TDC Position (Upper Timing Chain)
    G02102241Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Remove the vacuum hoses, electrical harness connectors, and harness clamps.
  5. Remove the power steering belt.
  6. Remove the power steering pump and position it to one side. Remove the idler pulley and bracket.
  7. Remove the rocker cover, loosen and remove the rocker cover bolts in the numerical order as shown.
    Fig 2: Identifying Rocker Cover Bolt Removal Order
    G02102242Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Remove the camshaft sprocket cover.
    Fig 3: Removing Camshaft Sprocket Cover And Stopper
    G02102243Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Wipe off the links of the timing chain next to the timing marks on the sprockets. Put paint marks on the timing chain, matching them with the timing marks on the cam sprockets and idler sprocket.
    Fig 4: Locating Mating Marks On Timing Chain
    G02102244Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Remove cam sprocket bolts, cam sprockets and upper timing chain.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.