Engine 2SZ-FE
The 2SZ-FE is a four-cylinder, in-line, water-cooled internal combustion gasoline engine. Gas distribution mechanism 16-valve, four valves per cylinder, assembled according to the DOHC scheme.
The rotational movement from the crankshaft is transmitted to the timing camshafts by means of a chain drive. The "smart" VVT-I valve timing system has significantly increased power and torque compared to the first engine in the family. The optimal angle between the intake and exhaust valves (the letter F in the name), and the electronic fuel injection system (letter E), made the 2SZ-FE more economical than its predecessor.
Characteristics 2SZ-FE
| Length Width Height | 3614 / 1660 / 1499 mm |
| Engine capacity | 1.3 l. (1296 cm/cu.m.) |
| Power | 86 hp |
| Torque | 122 N * m at 4200 rpm |
| Compression ratio | 11:1 |
| Bore | 72 |
| Piston stroke | 79.6 |
| Engine resource before overhaul | 350 000 km |
Advantages and disadvantages
The Toyota 2SZ-FE engine retained atypical design features more suited to Daishitsu designs than Toyota. In the early 2000s, most series acquired lined aluminum cylinder blocks, with additional air cooling fins. The undoubted advantages of such a solution - simplicity, and therefore low cost of manufacture, as well as low weight compared to competitors' motors, made us forget about one thing. About maintainability.
The 2SZ-FE cast iron cylinder block is designed with enough strength and material to carry out a full overhaul. The excess heat generated by the long stroke of the pistons is successfully dissipated by the massive engine housing. The longitudinal axes of the cylinders do not intersect with the axis of the crankshaft, which significantly extends the service life of the piston-cylinder pair.
The disadvantages are mainly associated with the unsuccessful design of the gas distribution mechanism. It would seem that a chain drive should provide a high level of reliability and a long service life, but everything turned out differently. The length of the drive required the introduction of two chain guides into the design, and the hydraulic tensioner turned out to be surprisingly sensitive to oil quality. The leaf chain of Morse design, at the slightest loosening, jumps over the pulleys, which leads to the impact of the valve plates on the pistons.
Mounting the drive of mounted units is not brackets standard for Toyota, but tides made on the cylinder block housing. As a result, all equipment is not unified with other engine models, which significantly complicates repairs.
Scope
Unlike most production Toyota engines, the 2SZ-FE is designed for use in just two vehicle families - the Toyota Yaris and the Toyota Belta. Such a narrow "target audience" significantly increases the price of both the motor itself and spare parts for it. The contract engines available to the owners are a lottery, the winning in which depends more on luck than on other, more predictable, qualities.
In 2006, the next model of the series, the 3SZ engine, was released. Almost completely identical to its predecessor, it differs in volume increased to 1,5 liters and a power of 141 horsepower.
