Description
BMW 745i / 645i Engine N62B44 4.4L V8 For Sale
The BMW N62B44 is a 4.4L V8 engine used in the 645i and 745i, producing approximately 329 horsepower and 330 lb-ft of torque. It is a naturally aspirated engine with a 92 mm bore and 82.7 mm stroke. While a robust engine, a common issue includes valve stem seal leaks, which can cause oil consumption and smoke, especially in models like the 545i (which uses the same engine family).
Engine specifications
- Displacement:Â 4,398 cc (4.4L)
- Configuration: 90° V8
- Bore:Â 92 mm (3.6 in)
- Stroke:Â 82.7 mm (3.3 in)
- Power:Â 245 kW (329 hp) at 6,100 rpm
- Torque:Â 450 Nâ‹…m (330 lb-ft) at 3,600 rpmÂ
Common issues
- Valve stem seal leaks:Â A common problem is that the valve stem seals can harden and crack over time due to heat and age. This can lead to oil leaking into the combustion chamber, causing increased oil consumption and blue smoke from the exhaust
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