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 MANUALSINFINITI2008FX45 AWD V8-4.5L (VK45DE)REPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYSYSTEM SPECIFICATIONSTIGHTENING TORQUE AND SEQUENCEMAIN BEARING CAP
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)
Main Bearing Cap
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)SECTION Main Bearing Cap
Main Bearing Cap
Install each main bearing cap bolt as follows:
Apply new engine oil to threads and seating surface of main bearing cap bolts, and tighten all bolts temporarily.
Tighten main bearing cap bolt (M12) in order of 1 to 10.
Torque 39.2 Nm (4.0 kg-m, 29 ft-lb)
Tighten main bearing cap sub bolt (M9) in order of 11 to 20.
Torque 29.4 Nm (3.0 kg-m, 22 ft-lb)
Tighten main bearing cap bolt (M12) to 40 degrees clockwise in order of 1 to 10.(Angle tightening)
CAUTION:
Use angle wrench (SST) to check tightening angle in step "d" and "e". Do not make judgment by visual inspection.
Tighten main bearing cap sub bolt (M9) to 30 degrees clockwise in order of 11 to 20. (Angle tightening)
Tighten side bolt (M10) in order of 21 to 30.
Torque 49 Nm (5.0 kg-m, 36 ft-lb)
After installing main bearing cap bolts, make sure that crankshaft can be rotated smoothly.
Check the crankshaft end play. Refer to EM-256, "Inspection After Disassembly". Inspection After Disassembly
Install each main bearing cap bolt as follows:
Apply new engine oil to threads and seating surface of main bearing cap bolts, and tighten all bolts temporarily.
Tighten main bearing cap bolt (M12) in order of 1 to 10.
Torque 39.2 Nm (4.0 kg-m, 29 ft-lb)
Tighten main bearing cap sub bolt (M9) in order of 11 to 20.
Torque 29.4 Nm (3.0 kg-m, 22 ft-lb)
Tighten main bearing cap bolt (M12) to 40 degrees clockwise in order of 1 to 10.(Angle tightening)
CAUTION:
Use angle wrench (SST) to check tightening angle in step "d" and "e". Do not make judgment by visual inspection.
Tighten main bearing cap sub bolt (M9) to 30 degrees clockwise in order of 11 to 20. (Angle tightening)
Tighten side bolt (M10) in order of 21 to 30.
Torque 49 Nm (5.0 kg-m, 36 ft-lb)
After installing main bearing cap bolts, make sure that crankshaft can be rotated smoothly.
Check the crankshaft end play. Refer to EM-256, "Inspection After Disassembly". Inspection After Disassembly
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.