The 1.5-liter Toyota 1N diesel engine was assembled at a factory in Japan from 1986 to 1999 and was installed in three generations of the compact Starlet model, popular in the Asian market.
The 1.5-liter Toyota 1NT turbo diesel engine was assembled by the company from 1986 to 1999 and was installed in three generations of the popular Tercel model, as well as its Corsa and Corolla II clones.
This engine is an in-line four-cylinder engine with a displacement of 1453 cm³. It has a high compression ratio of 22:1. The cylinder block is made of cast iron, the cylinder head is made of light aluminum alloy. The cylinder head has two valves per cylinder, which are driven by one camshaft. The scheme with the upper position of the camshaft is used. The timing belt and fuel injection pump are driven by a belt. Phase shifters and hydraulic valve clearance compensators are not provided, the valves require periodic adjustment. If the timing belt drive breaks, the valves are deformed, so it is necessary to carefully monitor the condition of the belt. The recesses on the pistons were sacrificed in favor of a high compression ratio.
The fuel system is of the pre-chamber type. In the cylinder head, on top of the combustion chamber, another preliminary cavity is made, into which the fuel-air mixture is supplied through the valve. When ignited, hot gases spread through special channels into the main chamber.
Specifications
| Production years | 1986-1999 |
| Displacement, cc | 1453 |
| Fuel system | prechamber |
| Power output, hp | 55 (1N) 67 (1NT) |
| Torque output, Nm | 93 (1N) 130 (1NT) |
| Cylinder block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder bore, mm | 74 |
| Piston stroke, mm | 84.5 |
| Compression ratio | 22.0 |
| Features | SOHC |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no (1N) yes (1NT) |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 3.5 |
| Fuel type | diesel |
| Euro standards | EURO 0 |
| Fuel consumption, L/100 km (for Toyota Starlet 1993) — city — highway — combined |
6.8 4.6 5.7 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 130 (1N) 137 (1NT) |
The engine was installed on:
- Toyota Starlet 3 (P70) in 1986 – 1990; Starlet 4 (P80) in 1989 – 1995; Starlet 5 (P90) in 1996 – 1999;
- Toyota Tercel 3 (L30) in 1986 – 1990; Tercel 4 (L40) in 1990 – 1994; Tercel 5 (L50) in 1994 – 1999.
Disadvantages of the 1N / 1N-T engine
- Usually the cylinder-piston group wears out here and then the compression drops;
- Carefully monitor the condition of the timing belt, as when it breaks, the valves bend;
- This diesel engine has a modest resource and often begins to crumble already by 200,000 km;
- The turbine on the 1N-T also does not shine with reliability and often drives oil to a run of 150,000 km.
