Toyota Engine 3VZ-FE Repair Manual

Toyota Engine 3VZ-FE Repair Manual

3VZ–FE ENGINE

 DESCRIPTION

The 3VZ–FE engine is a V–6, 3.0–liter, 24–valve DOHC engine based on the reputable 2VZ–FE engine in the ES250.

The total piston displacement is increased and other changes incorporated to deliver greater power output while enhancing quietness.

Since the 3VZ–FE and the 2VZ–FE engines are basically the same, only major differences are explained below.

1. Cylinder Head

The intake port of the cylinder heads in the 3VZ–FE engine has been made more upright and straight than in the 2VZ–FE engine in order to improve torque in the medium to low ranges. The port itself is positioned in an upright position to improve intake efficiency. These changes help to improve torque in low to medium ranges.

2. Cylinder Block

 The deck height of the cylinder block is increased to 223 mm (8.78 in.), 20 mm (0.79 in.) more than that of the 2VZ–FE engine.

 A knock sensor boss is installed for each bank in the V–bank of the cylinder block to accommodate the two knock sensors.

 A large, aluminum stiffener is added to increase rigidity of the power train.

3. Piston

The semi–floating type piston pin is replaced by the full–floating type to match the higher power output from the increased piston displacement.

4. Crankshaft

Detailed information about the crankshaft of the 3VZ–FE engine is shown in the table. A number of

changes are made from the 2VZ–FE engine to increase rigidity while reducing vibration and noise.