From 1986 to 1999, a Japanese factory assembled the 1.5-liter Toyota 1N diesel engine, which was used in three iterations of the compact Starlet model that was well-liked in the Asian market.
From 1986 to 1999, the company assembled the 1.5-liter Toyota 1NT turbo diesel engine, which was fitted in three iterations of the well-liked Tercel model as well as its Corsa and Corolla II knockoffs.
This engine has a displacement of 1453 cm³ and is an in-line four-cylinder engine. At 22:1, it has a high compression ratio. Cast iron makes up the cylinder block, while light aluminum alloy makes up the cylinder head. Each cylinder in the cylinder head has two valves that are powered by a single camshaft. The camshaft’s upper position is employed in this scheme. A belt powers both the fuel injection pump and the timing belt. There are no hydraulic valve clearance compensators or phase shifters, and the valves need to be adjusted on a regular basis. It is vital to keep a close eye on the belt’s condition because if the timing belt drive breaks, the valves will be distorted. A high compression ratio came at the expense of the pistons’ recesses.
It is a pre-chamber fuel system. Another preliminary cavity is created in the cylinder head above the combustion chamber, and the fuel-air mixture is fed into it via the valve. Hot gases enter the main chamber through specific channels after igniting.
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
Here, the cylinder-piston group typically wears out before the compression decreases;
This diesel engine has a limited resource and frequently starts to crumble by 200,000 kilometers; keep a close eye on the timing belt’s condition because when it breaks, the valves bend;
Additionally, the 1N-T’sturbinelacks dependability and frequently pushes oil 150,000 kilometers.