Toyota 1HD-FTE

Toyota 1HD-FTEThe 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 DOHC
  • T – Turbocharged
  • E – Electronic fuel injection

General information

Engine Specifications
Engine code1HD-FTE
LayoutStraight-6, vertical
Fuel typeDiesel
Production
Displacement4.2L, 4,164 cc (254.1 cu in)
Injection pumpElectronically-controlled
Power adderToyota CT26 or CT20B with intercooler
Horsepower net205 PS (151 KW; 202 HP) at 3,400 rpm
Torque output430 Nm (43.9 kg·m; 317.3 ft·lb) at 3,200 rpm
Firing order1-4-2-6-3-5
Dimensions (L x H x W):
Weight

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.

Cylinder block
Cylinder block alloyCast iron
Compression ratio:18.8:1
Cylinder bore:94 mm (3.7 in)
Piston stroke:100 mm (3.94 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:7
Cylinder bore inner diameter:94.000-94.010 mm (3.7001-3.7012 in)
Piston skirt diameter93.870-93.880 mm mm (3.6956-3.6960 in)
Piston ring groove:First0.070-0.110 mm (0.0028-0.0043 in)
Second0.040-0.080 mm (0.0016-0.0031 in)
Oil0.030-0.070 mm (0.0012-0.0028 in)
Piston ring end gap:First0.270-0.300 mm (0.0106-0.0130 in)
Second0.400-0.550 mm (0.0157-0.0216 in)
Oil0.200-0.500 mm (0.0079-0.0196 in)
Piston pin outer diameter33.000-33.012 mm (1.2992-1.2997 in)
Piston pin bore diameter33.008-33.020 mm (12.995-1.3000 in)
Crankshaft main journal diameter:66.994-57.000 mm (2.7953-2.7955 in)
Crankpin diameter:58.982-59.000 mm (2.3221-2.3228 in)
Crankshaft center distance:50.0 mm (1.9685 in)

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 OHV 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.

Cylinder head
Cylinder head alloyCast iron
Valve Arrangement:OHV
Valves:24 (4 valves per cylinder)
Intake valves diameter:33.0 mm (1.2992 in)
Exhaust valves diameter:30.5 mm (1.2007 in)
Intake valves length:126.85-127.45 mm (4.9941-5.0177 in)
Exhaust valves length:126.83-127.43 mm (4.9933-5.0169 in)
Intake valve stem diameter:6.970-6.985 mm (0.2744-0.2750 in)
Exhaust valves stem diameter:6.960-6.975 mm (0.2740-0.2746 in.l
Camshaft journal diameter: 1st: 34.969-34.985 mm (1.3767-1.3774 in)
Others: 27.986-27.998 mm (1.1018-1.1023 in)
Intake cam lobe height:48.203-48.303 mm (1.8978-1.9017 in)
Exhaust cam lobe height:50.734-50.834 mm (1.9974-2.0013 in)

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

Valve clearance (Cold)
Intake valve0.17-0.23 mm (0.007-0.009 in)
Exhaust valve0.47-0.53 mm (0.019-0.021 in)
Compression pressure
Standard35.0 kg/m2 (3,432 kPa, 498 psi) / 250 rpm
Minimun25.0 kg/m2 (2,452 kPa, 358 psi) / 250 rpm
Compression differential limit between cylinders5.0 kg/m2 (490 kPa, 71 psi) / 250 rpm
Oil system
Recommended engine oilSemi Synthetic 10W-30 or 10W-40 (“CD” or higher: “CH”, “CI”)
Engine oil capacity Dry fill: 12.1 L (12.8 US qt, 10.6 Imp. qt)
With oil filter change: 11.4 L (12.0 US qt, 10.0 Imp. qt)
Without oil filter change: 10.1 L (10.7 US qt, 8.9 Imp. qt)
Fuel system
Idling550-600 rpm
Max engine speed under no load4300-4500 rpm
Turbocharger CT20B
Turbocharging pressure0.49-0.69 kgf/cm2 (50-70 kPa, 7.0-9.8 psi)
Turbo pressure sensor voltage4.75-5.5 V

Vehicle applications

ModelYears Produced
Toyota Land Cruiser (HDJ78) Troop Carrier
Toyota Land Cruiser (HDJ79)
Toyota Land Cruiser (HDJ100)
Toyota Coaster (HDB50)
Toyota Coaster (HDB51)
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6 Comments

  1. what is the main difference between the 1hdfte engine in the 79 series and the 100 series isee they have a different turbo and the 100 series has an intercooler are the pumps and injectors the same

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