Toyota Y engine
The Toyota Y engine is a design that's a combination of the Toyota T engine, and the Toyota R engine, in a way that's similar to how the Toyota F engine is a design of the Toyota Type B engine, and the Chevrolet inline-six. The Y engine has mostly only been used in commercial and off-road vehicles.
The valve arrangement from the Toyota K engine is interchangeable with this engine.
There is also the 1Y-J, with the "J" suffix meaning that the engine is built to meet emissions standards for light commercial vehicles.
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The 2Y engine is an OHV, eight valve construction just like the 1Y. It shares that engine's 86.0 mm bore, but stroke is increased to 78.0 mm for a displacement of 1.8 litres. There are also 2Y-J and 2Y-U engines with differing emissions control equipment.
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There is also the emissions cleaned 3Y-U engine.
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This is the low emissions motor with catalytic converter exhaust system
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This engine was available either carburetted (4Y) or fuel injected (4Y-E, called the 491Q-ME for Chinese manufacture). As fitted to a 1989 Daihatsu Delta truck, the carburetted 4Y produces 70 kW (95 PS; 94 hp) at 4400 rpm (SAE net) and 182 N·m (18.6 kg·m; 134 lb·ft) at 3000 rpm.
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