151 Engine Service and Repair Technician Handbook Engine Position Toyota engines are mounted in the front of the vehicle. However, the engine can be oriented in the engine compartment two different ways – longitudinally or transversely. • In rear wheel drive models, the engine is typically mounted longitudinally (crankshaft aligned front-to-back). • In front wheel drive models, the engine is mounted transversely (crankshaft aligned side-to-side). • In 4-wheel drive vehicles, the engine is typically mounted longitudinally (similar to rear wheel drive vehicles), with the transfer case redirecting part of the engine’s power to the front wheels.
Cylinder Identification Many service procedures require you to identify a particular cylinder based on its cylinder number. Although the cylinder-numbering-patterns for longitudinally mounted engines or transversely mounted engines are often similar, you can’t assume every vehicle is the same. Always refer to the vehicle’s Repair Manual to be certain of cylinder numbers. NOTE You can also find cylinder identification information in T-SB-0389-09 for the following engines: 1AZ-FE, 2AZ-FE, 2AZ-FE (PZEV), 1GR-FE, 2GR-FE, 2JZ- GE, 1MZ-FE, 3MZ-FE, 1UR-FE, 3UR-FE, 2UZ-FE, 5VZ-FE, and 1ZZ-FE. Technical Training 19