Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSNISSAN-DATSUN2003FRONTIER BASE, STANDARDREPAIR AND DIAGNOSISENGINE MECHANICALENGINE MECHANICAL (KA24DE)CYLINDER BLOCKASSEMBLYPISTON

2003 Nissan-Datsun Frontier Base, Standard

Cylinder Block: Assembly: Piston

2003 Nissan-Datsun Frontier Base, StandardSECTION Piston

Completely remove any foreign material from the cylinder block, inside the crankshaft case, and cylinder bores by blowing compressed air in the passages and oil passages.
Install the oil jets.
- Oil jets for the No. 1 and No. 3 cylinders are a different shape from those for the No. 2 and No. 4 cylinders, as shown.
  
  Fig 1: Identifying Oil Jets For 1, 2, 3, And 4 Cylinder
  Courtesy of NISSAN MOTOR CO., U.S.A.
- Insert the oil jet knock pin into the cylinder block knock pin hole, and tighten the knock pin bolt to specification.
  Oil jet bolt: 30 - 40 N.m (3.1 - 4.1 kg-m, 22 - 30 ft-lb)
  
  Fig 2: Inserting Oil Jet Knock Pin Into Cylinder Block Knock Pin Hole
  Courtesy of NISSAN MOTOR CO., U.S.A.
Heat piston to 60° to 70°C (140° to 158°F) and assemble piston, piston pin and connecting rod.
- Align the direction of piston and connecting rod.
  
  Fig 3: Assembling Piston, Piston Pin And Connecting Rod
  Courtesy of NISSAN MOTOR CO., U.S.A.
- Numbers stamped on connecting rod and cap correspond to each cylinder.
- After assembly, make sure connecting rod swings smoothly.
  
  Fig 4: Identifying Cylinder And Piston Grade Numbers
  Courtesy of NISSAN MOTOR CO., U.S.A.
Set piston rings as shown.

Fig 5: Identifying Piston Rings Setting Position
Courtesy of NISSAN MOTOR CO., U.S.A.

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.