Here's a full teardown of the Toyota 3VZ engine to see what's inside and how it works!

The Toyota 3VZ engine is a 3.0L single overhead cam engine with an iron block and aluminum heads. The 3VZE engine used in this video is from a 2nd generation Toyota 4Runner, but was also found in Toyota's Tacoma pickups. It barely made 150HP and 180ftlb of torque and was underpowered for typical 4Runner off road duty.

The 3VZ engine was associated with headgasket failure due to its design.
Once the headgasket failed, coolant and oil would mix and engine could overheat. If prolonged, the coolantoil mixture would reach critical lubrication components such as the cam and crank bearings and cause them to wear out excessively, as seen in this video. Furthermore, the mixture could clog water passages forming sludge.

The engine in this video was out of a 1995 Toyota 4Runner. Usually, when the headgasket is replaced and cylinder head checked for flatness, the issue should not arise. The engine is also limited in capability due to its two valve per cylinder design, since it cannot breath or exhaust enough air to make power.

This is the Camera I use:
https://amzn.to/3oaRcZX (US)
https://amzn.to/3KWQ2uU (Canada)

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