BMW N62
Template:Infobox automobile engine
The BMW N62 is a naturally aspirated V8 petrol engine which was used in BMW cars from 2001 to 2010. It also remained in small-scale production for the Morgan Aero until 2019.<ref>Template:Cite journal</ref> The N62 is the world's first engine to use a continuously variable-length intake manifold,<ref>Template:Cite journal</ref> and BMW's first V8 to feature variable valve lift (called Valvetronic).<ref>Template:Cite web</ref><ref name=bmwheaven>Template:Cite web</ref><ref name="bmwblog.com">Template:Cite web</ref>
Unlike its predecessor and successor, there was no M version of the N62.
In the International Engine of the Year awards in 2002, the N62 was awarded "International Engine of the Year", "Best New Engine" and "Above 4-litre" categories.<ref>Template:Cite web</ref>
Design
The N62 was a clean sheet design and not a direct evolution of the M60 engine line that evolved into the M62 engine. The N62 4.4L has a bore of Template:Convert and stroke of Template:Convert for a total displacement of 4,398cc and features double-VANOS variable valve timing on both the intake and exhaust camshafts (the M62 features variable valve timing on only the intake camshaft).<ref name="unixnerd">Template:Cite web</ref> As per the M62, the N62 has double overhead camshafts (DOHC) with four valves per cylinder, an aluminium engine block and an aluminium cylinder head. The N62 4.4 featured offset fracture-split forged powdered metal connecting rods and it was also the first V8 and only the second BMW engine to feature Valvetronic technology which on the N62 varies the valve lift of the engine from .03mm to 9.85mm.<ref name="Technical Release">Template:Cite web</ref> The redline is 6500 rpm.<ref name=bmwheaven/> Valvetronic technology allows for variable valve timing, variable lift and variable duration and the N62 adjusts the lift instead of utilizing the throttle body during normal operation. The engine does feature a throttle body but this is only used for emergency applications in the event of Valvetronic failure, for certain cold start conditions and to maintain a set amount of vacuum in the intake during low load conditions such as cruising on the highway or idling. The vacuum pump mounted on the bank 1 cylinder head only supplies the brake booster and certain auxiliaries with vacuum, making the use of the standard TB for manifold vacuum control a requirement for proper functioning of the crankcase ventilation system as well as the fuel evap valve and other emissions related systems.<ref name="Technical Release">Template:Cite web</ref>
The N62B44 is the only production engine in the world to feature a continuously variable length intake manifold known as the DIVA intake (not to be confused with the DISA intake as used on many other BMW production engines). The intake length path begins to shorten at 3,500 RPM and is progressively shortened until it reaches its shortest length at the engine's redline. This maximizes torque throughout the RPM range, producing a much broader torque curve and more peak HP.
Applications:
- 2004-2005 BMW 5 Series (E60) 545i
- 2004-2005 BMW 6 Series (E63) 645Ci
- 2001-2004 BMW 7 Series (E65) 745i/745Li
- 2004-2006 BMW X5 (E53) X5 4.4i and 4.8is
The N62B48 engine used in the E53 X5 4.8is was a 4.8L variant of the N62B44 which was accomplished by way of an increased bore size to Template:Convert and stroke to Template:Convert which increased the displacement to 4798.52 cc. The N62B48 in the E53 shared other components with the N62B44 including the DIVA intake which was replaced when the engine was evolved to the N62TU. The oil pan was modified and deepened to account for the longer stroke crankshaft, this change was applied to all N62's in October 2003 which includes the 4.4 variants in production at the time. Other changes were also made to accommodate the longer stroke crankshaft such as more traditional non-offset connecting rods.
The N62 was evolved into the N62TU beginning in model year 2005 and the 4.4 was replaced with the 4.8 variant by using the same bore and stroke from the 4.8 version in the E53 4.8is.<ref name="N62 Update">Template:Cite web</ref> The N62TU featured several changes over the N62B44, including different exhaust manifolds, improved catalytic converters, new pre-cat oxygen sensors, new MAF, updated engine management unit, replacement of the DIVA continuously variable length intake manifold to a DISA two-stage manifold, removal of secondary air injection ports and different heads to accommodate this change and the increased bore, different spark plugs and inlet and exhaust valves with a stem diameter decreased to 5mm from 6mm.
Applications:
- 2005-2010 BMW 5 Series (E60) 550i
- 2005-2010 BMW 6 Series (E63) 650i
- 2005-2008 BMW 7 Series (E65) 750i/750Li
- 2007-2010 BMW X5 (E70) X5 4.8i
Versions
| Engine | Displacement | Power | Torque | Year |
|---|---|---|---|---|
| N62B36 | Template:Convert | Template:Convert at 6,200 rpm |
Template:Convert at 3,700 rpm |
2001 |
| N62B40 | Template:Convert | Template:Convert at 6,300 rpm |
Template:Convert at 3,500 rpm |
2005 |
| N62B44 | Template:Convert | Template:Convert at 6,100 rpm |
Template:Convert at 3,700 rpm |
2003 |
| Template:Convert at 6,100 rpm |
Template:Convert at 3,600 rpm |
2001 | ||
| N62B48 | Template:Convert | Template:Convert at 6,200 rpm |
Template:Convert at 3,500 rpm |
2004 |
| Template:Convert at 6,300 rpm |
Template:Convert at 3,400 rpm |
2005 | ||
| Template:Convert at 6,300 rpm |
Template:Convert at 3,400 rpm |
2005 | ||
| H1 | Template:Convert | Template:Convert at 5,500 rpm |
Template:Convert at 3,500 rpm |
2007 |
| Template:Convert at 5,500 rpm |
Template:Convert at 4,750 rpm |
2007 |
N62B36
The N62B36 is a Template:Convert version. Bore is Template:Convert and stroke is Template:Convert. It produces Template:Convert at 6,200 rpm and Template:Convert at 4,250 rpm.<ref name=bmwheaven /><ref>Template:Cite web</ref>
Applications:
- 2001-2005 E65/E66 735i/735Li
N62B40
The N62B40 is a TU variant which replaced the 3.6L Template:Convert version. Bore is Template:Convert and stroke is Template:Convert. It produces Template:Convert at 6,300 rpm and Template:Convert at 3,500 rpm.<ref name=bmwheaven /><ref name="unixnerd"/>
Applications:
- 2005-2010 E60/E61 540i sedan and touring
- 2005-2008 E65/E66 740i/740Li sedan
N62B44
The N62B44 is a Template:Convert version. Bore is Template:Convert and stroke is Template:Convert. It produces Template:Convert at 6,100 rpm and Template:Convert at 3,600 rpm (except for in the X5 model).
Applications:
- 2001-2005 E65/E66 745i/745Li
- 2003-2006 E53 X5 4.4i- Template:Convert at 6100 rpm and Template:Convert at 3700 rpm
- 2003-2005 E60/E61 545i
- 2003-2005 E63/E64 645Ci
- 2005-2007 Morgan Aero 8 Series 2 and Series 3<ref>Template:Cite web</ref>
N62B48
The N62B48 has a displacement of Template:Convert, a bore of Template:Convert and a stroke of Template:Convert.
Applications- 261 kW version:
- 2007–2010 E70 X5 4.8i SAV
Applications- 265 kW version:
- 2003–2011 Wiesmann GT MF4 / Roadster MF4
- 2004-2006 E53 X5 4.8iS SAV
Applications- 270 kW version:
- 2005-2010 E60/E61 550i sedan and touring
- 2005–2010 E63/E64 650i coupé and convertible
- 2005-2008 E65/E66 750i/750Li
- 2008–2010 Morgan Aero 8 Series 4, Series 5, Aeromax, and Aero Coupe<ref>Template:Cite web</ref>
- 2010–2015 Morgan Aero SuperSports
Alpina H1
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The H1 is a version of the N62B44 made by Alpina. The H1 is based on an N62B44 block with a forged crankshaft from Alpina, high strength Mahle pistons and the addition of an ASA centrifugal supercharger.<ref>Template:Cite web</ref> The H1 has a redline of 6,200 rpm.
Applications- 368 kW
- 2005–2007 in the Alpina B5 (E60/E61)<ref name="Alpina E60">Template:Cite web</ref>
- 2006–2007 in the Alpina B6 (E63)<ref name="Alpina E63">Template:Cite web</ref>
- 2003–2008 in the Alpina B7 (E65)<ref name="Alpina E65">Template:Cite web</ref>
Applications- 390 kW
- 2007–2010 in the Alpina B5 S (E60/E61)<ref name="Alpina E60" />
- 2007–2010 in the Alpina B6 S (E63)<ref name="Alpina E63" />