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 DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALENGINE MECHANICAL (KA24DE)CYLINDER BLOCKDISASSEMBLYPISTON AND CRANKSHAFT

2003 Nissan-Datsun Frontier Base, Standard

Piston And Crankshaft

2003 Nissan-Datsun Frontier Base, StandardSECTION Piston And Crankshaft

Place the engine on a work stand.

Fig 1: Placing Engine On Work Stand
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove the oil pan. Refer to "REMOVAL ".
Remove the timing chain. Refer to "REMOVAL ".
Remove the water pump. Refer to "REMOVAL ".
Remove the cylinder head. Refer to "REMOVAL ".
Remove the pistons with connecting rods.
CAUTION: Use care not to scratch the engine block cylinder bore when removing the piston and connecting rod assemblies.
Remove bearing caps in the numerical order as shown, and remove the crankshaft.
1. Loosen the main bearing cap bolts in several steps in the numerical order as shown.
  
  Fig 2: Identifying Bearing Cap Bolt Removal Order
  Courtesy of NISSAN MOTOR CO., U.S.A.
  - Before removing the main bearing caps, mark the location and direction on each cap and bolt for correct placement for installation.
  - Before removing the main bearing cap bolts, measure crankshaft end play. Refer to "CRANKSHAFT ".
2. Using the main bearing cap bolts, remove the main bearing cap while shaking it right and left as shown.
  - Remove the No. 3 and No. 5 main bearing caps using Tool.
    Main Bearing Cap Remover: KV10114700 (J-38139)
  Fig 3: Removing Main Bearing Cap
  Courtesy of NISSAN MOTOR CO., U.S.A.
Remove the crankshaft.
Remove the main bearings from the cylinder block journals and the main bearing caps.
CAUTION: Before removal, mark the main bearings with their location and direction for installation into their original position.
Remove the oil jets.

RENDER: 1.0x

NO RELATED

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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.