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.
Disassembly And Assembly: Assembly
Do not reuse washers.
- Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to remove any foreign material.CAUTION:
Use a goggles to protect your eye.
- Install each plug to cylinder block as shown in the figure below.
2 Washer Arrow Engine Front - Apply liquid gasket to the thread of water drain plug (4).
Use Genuine RTV silicon sealant or equivalent. Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS .
- Apply sealant to the thread of plug (1).
Use genuine high strength thread locking sealant or equivalent.
NOTE:Do not apply liquid gasket or high strength thread locking sealant to the plug (3).
- Tighten each plug as specified below.
Part Washer Tightening torque 1 Yes 54.0 N•m (5.5 kg-m, 40 ft-lb) 3 No 19.6 N•m (2.0 kg-m, 14 ft-lb) 4 No 9.8 N•m (1.0 kg-m, 87 in-lb) - Apply liquid gasket to the thread of water drain plug (4).
- Install main bearings and thrust bearings with the following procedure:
- Remove dust, dirt, and engine oil on the bearing mating surfaces of cylinder block and main bearing cap.
- Install thrust bearings to the both sides of the No. 3 journal housing (B) on cylinder block.
Arrow Engine Front - Install thrust bearings with the oil groove (A) facing crankshaft arm (outside).
- Install the main bearings paying attention to the direction.
- Before installing main bearings, apply new engine oil to the bearing surface (inside). Do not apply new engine oil to the back surface, but thoroughly clean it.
- When installing, align main bearing to the center position of cylinder block and main bearing cap.
- The difference (A) between main bearing (upper) (1) and main bearing (lower) (3) should be 0.85 mm (0.0335 in) or less when installing.
Courtesy of NISSAN NORTH AMERICA, INC.
2 Cylinder Block 4 Main Bearing Cap - Ensure the oil holes on cylinder block and oil holes (A) on the main bearings (1) are aligned.
- Install signal plate to crankshaft if removed.
- Set the signal plate with the flange facing toward the counter weight side (engine front side) to the crankshaft rear surface.
- Apply new engine oil to threads and seat surfaces of mounting bolts.
- Position crankshaft (2) and signal plate (1) using a dowel pin (service part), and tighten mounting bolts in numerical order as shown in the figure below using TORX socket.
A Dowel Pin Hole NOTE:Dowel pin of crankshaft and signal plate is provided as a set for each.
- Tighten mounting bolts in numerical order as shown in the figure below again.
- Remove dowel pin. (service parts)CAUTION:
Be sure to remove dowel pin.
- Install crankshaft to cylinder block.
- While turning crankshaft by hand, check that it turns smoothly.
- Install main bearing caps with the following procedure:
- Install main bearing caps referring to the journal No. stamp (A) and front mark (B) as shown in the figure below.
Courtesy of NISSAN NORTH AMERICA, INC.
Arrow Engine Front NOTE:Main bearing cap cannot be replaced as a single part, because it is machined together with cylinder block.
- Tighten main bearing cap bolts in numerical order as shown in the figure below with the following procedure:
Arrow Engine Front - Apply new engine oil to threads and seat surfaces of mounting bolts.
- Tighten main bearing cap bolts.
: 34.3 N•m (3.5 kg - m, 25 ft - lb) - Turn main bearing cap bolts 70 degrees clockwise (angle tightening) in order from No. 1 to 10 in the figure.CAUTION:
Confirm the tightening angle by using an angle wrench [SST: KV10112100 (BT8653-A)] (A) or protractor. Never judge by visual inspection without the tool.
- Install main bearing caps referring to the journal No. stamp (A) and front mark (B) as shown in the figure below.
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.