Toyota VZ (3VZ-E / 5VZ-FE)

V6 · naturally aspirated · petrol · 1987–2004

Also known as: 3vz-e, 5vz-fe, 3vz, 5vz, vz engine, 3.4 v6 toyota, 3.0 v6 toyota, 3vz-fe, 2vz-fe, 4vz-fe, 2vz, 4vz, 1vz-fe, 1vz

Toyota's V6 before the GR — the 3.0 3VZ-E and the 3.4 5VZ-FE — in the 4Runner, T100, Tacoma, Tundra and Previa. The two have opposite reputations and it is worth knowing which is which.

The 3VZ-E is the one with the head gasket problem, and it was widespread enough that Toyota extended coverage. Coolant loss and overheating on a 3.0 of that era points there first, and by now the question is whether it has already been done rather than whether it will happen.

The 5VZ-FE is the opposite — one of the most durable engines Toyota has built, and the reason so many high-mileage Tacomas and 4Runners are still working.

Both are belt-driven and non-interference, which is the single most useful thing to know about them: a snapped timing belt strands the vehicle and does not bend the valves. That changes the calculation on a cheap example with no belt history entirely — and it is the opposite of most of their contemporaries.

The water pump is driven by the timing belt, so the two are replaced together as a matter of course. A pump changed on its own means the belt has been disturbed and not renewed, which is worth asking about.

Cars fitted with this engine

11 generations, across 2 makes. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.

Lexus

Toyota

Information, not instruction

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