Toyota 1HD-FTE

The Toyota 1HD-FTE is a 4.20 l (4,164 cc, 254.1 cu-in) six cylinders, four-stroke cycle water-cooled turbocharged internal combustion diesel engine, manufactured by the Toyota Motor Corporation.

The Toyota 1HD-FTE engine has a cast-iron block with 94 mm (3.7 in) cylinder bores and a 100 mm (3.94 in) piston stroke for a capacity of 4,164 cc (254.1 cu-in). Compression ratio rating is 18.8:1. The motor has a cast iron cylinder head with a single overhead camshaft (SOHC) with 24 valves which is mounted on a three-layer steel laminate type head gasket.

The 1HD-FTE engine is based on the 1HD-FT, but it has new valve seats, new pistons, an improved cooling system and an increased from 18.6:1 to 18.8:1 compression ratio. The 1HD-FTE engine is equipped with electronic rotary fuel injection pump; central vertically mounted injectors and Toyota CT26 turbocharger (for Toyota Land Cruiser 70- series) or Toyota CT20B turbocharger with intercooler (for Toyota Land Cruiser 100-series).

The Toyota 1HD-FTE produced 205 PS (151 kW; 202 HP) at 3,400 rpm of maximum horsepower and 430 Nm (43.9 kg·m; 317.3 ft·lb) at 3,200 rpm of maximum torque (for Toyota Land Cruiser 100-series with intercooler).

The breakdown of the engine code is as follows:

• 1 – 1nd generation engine
• HD – Engine family
• F – Economy narrow-angle
• T – Turbocharged
• E – Electronic fuel injection

General information

Cylinder block

The cylinder block has a monoblock high-strength cast-iron structure with the seven-bearing-support system. The 1HD-FTE engine is equipped with a forged crankshaft with seven forged journals and twelve balance weights.

The 1HD-FTE motor has carbon-steel connecting rods and an aluminum alloy piston for high strength, lightweight and good heat conductivity; two compression and one oil control rings. The cylinder bore is 94 mm (3.7 in), piston stroke is 100 mm (3.94 in) and compression ratio rating is 18.8:1.

Main bearing cap tightening procedure and torque specs:

• Step 1: 103 Nm; 10.5 kg·m; 76 ft·lb
• Step 2: Turn all bolts 90°

After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.

Connecting rod bearing nut

• Step 1: 37 Nm; 3.75 kg·m; 27 ft·lb
• Step 2: Turn all bolts 90°

Crankshaft pulley bolt

• 430 Nm; 43.0 kg·m; 317 ft·lb

Flywheel (M/T) or Drive plate (A/T) fixing bolts

• 127 Nm; 13.0 kg·m; 94 ft·lb

Cylinder head

The 1HD-FTE has a one-piece high-strength cast iron cylinder head with single (SOHC) high-quality carbon steel camshaft and aluminum rocker arms. Each rocker uses bridges to actuate a pair of valves.

The camshaft is driven by a timing belt and gears. The timing gear train included a hydraulic auto tensioner. Furthermore, the timing gear train drove the oil pump, vacuum pump, steering gear pump, injection pump, and camshaft.

The engine has SOHC design with four valves per cylinder (24 valves in total): two intake and two exhaust valves, which are made of special heat-resistant steel. Intake valves are 33.0 mm (1.2992 in) in diameter, and the exhaust valves are 30.5 mm (1.2007 in). Intake duration is 216° and exhaust duration is 246°.

The 1HD-FTE engine has an aluminum intake manifold and cast iron exhaust manifold that was mounted on a five-layer steel laminate type exhaust manifold gasket. The engine is equipped with the EGR system.

Head tightening procedure and torque specs:

• Step 1: 69 Nm; 7.0 kg·m; 51 ft·lb
• Step 2: Turn all bolts 90°
• Step 3: Turn all bolts 90°

Camshaft bearing cap

• 25 Nm; 2.5 kg·m; 18 ft·lb

Maintenance data

Vehicle applications

Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.