Nissan VH engine
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| Nissan VH | |
| Manufacturer: | Nissan Motor Company |
|---|---|
| Production: | 1990–2001 |
| Successor: | Nissan VK |
| Class: | DOHC 90° V8 |
| Engine: | 4.5 L (4494 cc/274 in³) 4.1 L (4130 cc/252 in³) |
| Similar: | Jaguar AJ-V8 Ford Modular V8 Ford/Yamaha V8 GM Premium V Mercedes-Benz M113/M155 BMW M62 BMW N62 Toyota UZ Nissan VK |
The VH series consists of 4.1 and 4.5 liter engines from the Nissan Motor Corporation. The design consists of a 90 degree V8 with an aluminum cylinder block that features a closed upper deck and a deep skirt. The cylinder heads are also aluminum with a DOHC 4-valve design and pentroof combustion chambers.
Read more about the VH series engines at *www.nissanV8.com and at *www.VH45DE.com.
[edit] VH45DE
The VH45DE is a 4.5 liter V8 developed by Nissan for use in the Infiniti Q45 sport luxury sedan (G50 platform) which was released in November of 1989. The engine was also used in the Japanese market Nissan President limousine (JG50 platform) which debuted in late 1990. The VH45DE generates 278 hp at 6000 rpm and 292 lb-ft at 4000 rpm with a redline of 6900 rpm.
Some of the pertinent features of the VH45DE are:
- Forged steel crankshaft.
- Forged steel connecting rods.
- 6 Bolt main bearing caps with studs.
- Full-length main bearing cap girdle.
- Lightweight, floating pistons with molybdenum coating.
- Sodium-filled exhaust valves.
- Cross-flow cooling system.
- Hydraulic lash adjusters.
- Single-row silent timing chain.
- Coil-on-plug ignition system.
- Roller rocker arms for reduced friction.
- Variable Valve Timing.
- Redline of 6900 rpm.
- Compression ratio of 10.2 to 1.
- Bore of 93 mm and stroke of 82.7 mm.
- Dimensions: 890 mm(L) x 740 mm(W) x 725 mm(H).
The 4.5 L VH45DE featured variable valve timing, also known as VTC, from 1990 until 1995. Due to tightening emissions regulations in the US market, the VTC feature was dropped from the 1996 Infiniti Q45. In the following year, the VH45DE was no longer available in any US market vehicles. The engine continued on in the Japanese market until 2002 in the Nissan President limousine.
This engine was used in the following vehicle:
- 1990-1996 Infiniti Q45, 278 hp, 294 lb-ft
- 1991-2002 Nissan President, 278 hp, 294 lb-ft
[edit] VH41DE
The VH41DE is a 4.1 liter V8 that was based on the VH45DE. The bore of 93 mm remained but the stroke was shortened to 76 mm. Power output for the new engine was 266 hp at 5600 rpm and 278 lb-ft at 4000 rpm. The shorter stroke and certain other changes resulted in a more compact engine which allowed the VH41DE to be used in platforms that could not accept the VH45DE engine.
The 4.1 L VH41DE was used in the following vehicles:
- 1997-2001 Infiniti Q45, 267 hp, 278 lb-ft
- 1992-1993 Nissan Leopard, 270 hp 370,69 nm
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