3vz only last for 2 years while the 1mz was on gen 3, 3.5, 4, 4.5 and even gen 5. Was that a faulty design of toyota I guess ?
I know there's a bunch of wrong infos floating around the internet, but here's what I found on the wiki
"3VZ-FE
The basic design is a revised 3VZ-E iron block truck motor, mated with aluminum DOHC 24-valve heads and Toyota's most advanced OBD-I control system. The upper aluminum intake plenum is of the split chamber design with Toyota's ACIS variable intake system feeding three sets of runners for both heads.
Because of the truck roots, the 3VZ-FE happens to be a physically tall motor. To make the engine fit, 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.
Parts-wise, the 3VZ-FE shares very little with the VZ engine family. The few parts shared with the 3VZ-E that are interchangeable are the main bearings, and little else. Also cams can be interchanged between the 5VZ-FE and 3VZ-FE heads(the 5VZ-FE cams have more low end torque). In a surprising twist, no electronics from other Toyota (Denso) parts are swappable.
The 3VZ-FE is a smooth running engine that was used on the Camry platform between 1992 and 1997.5 depending on the market: North America saw the engine only in 1992 and 1993 while Australia and New Zealand had it from 1992 through 1996. The engine was available in some parts of Asia and in the JDM Toyota Windom through 1997.5.
The 1992-1993 engine has 185 hp (138 kW) at 5800 rpm and 189 ft·lbf (256 N·m) at 4600 rpm. 1994+ have 200 hp (149 kW) at 5800 rpm and 204 ft·lbf (277 N·m) at 4600 rpm. There is no mechanical difference in the engine. In an embarrassing move, Toyota inadvertently created an engine competing with the more performance oriented 7M-GE (200 hp) and 2JZ-GE (225 hp) installed in sportier, more luxurious cars of the time. Because of this; the stock ignition timing and fueling was noticibly detuned. The power spread of the 3VZ-FE is wide, having 100% torque between 2500–4600 rpm, with power trailing off by 6000 rpm. Stock redline is 6600 rpm, and the ECU's fuel/ignition cut is 7200 rpm.
Though harder to find in good used condition in North America (unless imported), the 3VZ-FE is a fairly common V6 in most parts of the world, after having a good lifespan in popular models. They are cheap, simple, have few problems, and have become a semi-popular subject for engine swaps (particularly into the mid-engine MR2).
The 3VZ-FE has a larger forged steel crankshaft and large cast rods. They can handle double the stock power output, although forged pistons & rods are recommended. A few nitrous and turbocharged examples match or exceed 450hp (336kW) on both the stock engine and engine management with a piggyback chip controlling fuel & ignition.
Applications:
1992–1997 Toyota Camry "
http://en.wikipedia.org/wiki/Toyota_VZ_engine
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Linear Mode
