Toyota VZ engine
| Toyota VZ engine | |
|---|---|
 |
|
| Overview | |
| Manufacturer | Toyota Motor Corporation |
| Production | 1988–2004 |
| Combustion chamber | |
| Configuration | DOHC 60° 24-valve V6 |
| Chronology | |
| Predecessor | Toyota G engine |
| Successor |
Toyota MZ engine Toyota GR engine |
The Toyota VZ engine family is a series of V6 gasoline piston engines ranging from 2.0L to 3.4L in displacement and both SOHC and DOHC configurations. The family introduced many changes for Toyota, including various EFI, ECU, and engine improvements from generation to generation. The VZ was Toyota's response to the Nissan VG engine. The low angle DOHC cylinder heads excel in low-mid torque and power, making the VZ well-suited for various uses in cars, trucks, and SUVs.
The blocks are all strongly made using cast iron with large interconnected main bearing cradles and two bolt main bearing caps. Forged steel crankshafts, and cast iron main bearing support girdles became standard with the 3VZ-FE. Piston and ring construction are typical parts, with rods varying between large and very large for stock V6 production engines.
The 1VZ-FE is a 2.0 L (1992 cc) version. Bore is 78 mm (3.07 in) and stroke is 69.5 mm (2.74 in). Output is 136 hp (101 kW) at 6000 rpm and 128 lb·ft (173 N·m) at 4600 rpm.
Applications: Japan
The 2VZ-FE is a 2.5 L (2507 cc) version. Bore is 87.5 mm (3.4 in) and stroke is 69.5 mm (2.7 in) and the compression ratio is 9.0. Output is 119 kW (159 bhp) at 5800 rpm and 216 N·m (159 lb·ft) at 4600 rpm with red line limit of 6800 rpm.
Applications:
The 3VZ-E is a 3.0 L (2958 cc) version and is the only SOHC VZ-series engine, and the only non-DOHC V6 Toyota has ever built. Bore remains at 87.5 mm (3.44 in) but stroke is pushed to 82.0 mm (3.23 in). At introduction output was specified as 145 hp (108 kW) then later bumped to 150 hp (112 kW) at 4800 rpm with 180 lb·ft (244 N·m) of torque at 3400 rpm. Despite sharing an engine family designation the 3VZ-E and 3VZ-FE have few parts in common.
Applications:
The basic design is a revised 3VZ-E iron-block engine, mated with aluminum DOHC 24 valve heads. It has a forged steel crankshaft and cast connecting rods. The upper intake plenum is of the split-chamber design with Toyota's ACIS variable-intake system feeding three sets of runners for both heads.
Because the VZ was originally for pickup truck and SUV use, the 3VZ-FE happens to be a physically tall motor. To make the engine fit in FWD engine bays, Toyota tilted the motor towards the firewall. This "tilt" is so severe (~15 degrees) that reaching the rear bank of cylinders is nearly impossible without first removing the intake plenum.
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