What is the difference between 2AZ and 1AZ engine?
The 2AZ engine is bigger displacement version of the 1AZ engine from the same engine family. The main idea of the 2AZ was replacing the old 5s engine. Like 1AZ-FE, the 2AZ engine had an aluminum cylinder block with sleeves.
Which Toyota engines have timing chains?
Does my vehicle have a timing belt or timing chain?
| Model | Year | Belt / Chain / Gear |
|---|---|---|
| Avalon Hybrid | 2013-2020 | Chain |
| Camry | 1990-2001 | Belt |
| 2002-2020 | Chain | |
| 1990-2006 | Belt |
Does a RAV4 have a timing chain?
The Toyota RAV4 has a timing chain on the engine. Another advantage is that engines that have timing belts are much quieter, getting rid of that metal with metal contact which was obvious at older car models with timing chains. The timing chain on the other hand lasts a long time.
How often should timing chains be replaced?
between 80,000 and 120,000 miles
When does a timing chain need to be replaced? The timing chain normally needs to be replaced between 80,000 and 120,000 miles unless there is a specific problem. Issues with the chain are common in higher mileage vehicles.
What is the displacement of a 1AZ FE engine?
The 1AZ-FE engine is also equipped with “Electronic Spark Advance” (ESA) system, which selected optimal ignition timing in accordance with inputs from sensors. An 86.0 mm (3.39 in) cylinder bore and 86.0 mm (3.39 in) piston stroke give the 1AZ-FE motor a total of 1,998 cc (121.93 cu-in) of displacement.
What kind of engine does a Toyota 1AZ have?
The first in the displacement range is the 2.0-liter 1AZ-FE engine. Its predecessor is the 3S-FE. The engine includes many advanced technologies for that period. The 1AZ has aluminum cylinder block with cast iron liners.
How big is the intake valve on a Toyota 1AZ?
A single-stage roller timing chain drives camshafts. The angle between intake valves and exhaust valves is 27.5 deg. Intake valve diameter is 34.0 mm (1.3 in), and for exhaust valve – 29.5 mm (1.2 in). Valve lift is 8.0 mm (0.3-in) for both valve types. There are no hydraulic lifters. The engine equipped with the sequentially injected fuel system.
Which is better 1AZ Fe or 3ZR Fe?
The exhaust manifold and catalytic converter is one unit. The 1AZ engine has higher efficiency and fuel economy, low noise and vibration levels, lightweight and compact design, and excellent reliability compared to the predecessor. The engine has the older brother – the 2AZ-FE engine. The newest 3ZR-FE engine supersedes the 1AZ since 2007.