The 1HD-T engine has a cast iron block with 94 mm (3.7 in) cylinder bores and a 100 mm (3.94 in) piston stroke. The compression ratio is 18.6: 1. The engine has a single overhead camshaft (SOHC) cast iron cylinder head with two valves per cylinder; Toyota CT26 turbocharged and direct injection design with 0.48 bar boost pressure.
The Toyota 1HD-T produced 167 PS (123 kW; 165 HP) at 3,600 rpm of maximum power and 363 Nm (37.0 kg · m; 267.9 ft · lb) at 2,000 rpm of maximum torque.
The engine code breakdown is as follows:
- 1 – 1st generation engine
- HD – Engine family
- T – turbocharged
|Displacement||4.2 L, 4,164 cc (254.1 cu in)|
|Power adder||Toyota CT26|
165 PS (121 KW; 162 PS) @ 3,600 rpm
360 Nm (36.7 kg · m; 265.7 ft · lb) at 1,800 rpm
|Order to open fire||1-4-2-6-3-5|
|Dimensions (L x H x W):||–|
The cylinder block is made of cast iron. The crankshaft is supported by 7 bearings inside the crankcase. The crankshaft is integrated with 12 counterweights. The crankshaft bearing cap has a ladder frame construction and is built into the crankcase. The upper part of the cylinders is closed by the cylinder head, and the lower end of the cylinders becomes the crankcase, in which the crankshaft is installed.
The pistons are made of highly temperature resistant aluminum alloy. As the 1 HD-T engine is of the direct injection type, a deep combustion chamber has been provided. The first compression ring is made of steel and the second compression ring is made of cast iron. The oil ring is made of steel.
The cylinder bore is 94 mm (3.7 in.), The piston stroke is 100 mm (3.94 in.), And the compression ratio is 18.6: 1.
|Cylinder Block Alloy||Molten iron|
|Compression ratio:||18.6: 1|
|Cylinder bore:||94 mm (3.7 inches)|
|Piston stroke:||100 mm (3.94 inches)|
|Number of piston rings (compression / oil):||2/1|
|Number of main bearings:||7|
|Cylinder bore inner diameter:||94.000-94.030 mm (3.7001-3.7019 inches)|
|Piston skirt diameter||93.845-94.855 mm (3.8947-3.8951 inches)|
|Piston ring groove:||First||0.050-0.095 mm (0.0020-0.0037 inch)|
|Second||0.060-0.100 mm (0.0024-0.0039 inch)|
|Petroleum||0.030-0.070 mm (0.0012-0.0028 inch)|
|Piston Ring End Gap:||First||0.270-0.540 mm (0.0106-0.0212 inch)|
|Second||0.400-0.620 mm (0.0157-0.0244 inch)|
|Petroleum||0.200-0.520 mm (0.0079 – 0.0204 inch)|
|Piston pin outside diameter||33.000-33.012 mm (1.2992-1.2997 inches)|
|Piston pin hole diameter||33.008-33.020 mm (1.2995-1.3000 inches)|
|Diameter of main crankshaft journal:||66.994-67.004 mm (2.6375-2.6379 inches)|
|Crankpin diameter:||58.994-59.004 mm (2.3225-2.3230 inches)|
|Crankshaft Center Distance:||50.0 mm (1.9685 inches)|
Main bearing cap adjustment procedure and torque specifications:
- Step 1: 103 Nm; 10.5 kg · m; 76 ftlb
- Step 2: Turn all screws 90 °
After securing the bearing cap bolts, make sure the crankshaft turns smoothly by hand.
Connecting rod bearing nut
- Step 1: 37 Nm; 3.75 kg · m; 27 ftlb
- Step 2: Turn all screws 90 °
Crankshaft pulley bolt
- 500 Nm; 50.0 kg · m; 369 ftlb
Flywheel (M / T) or Drive Plate (A / T) Fixing Bolts
- 127 Nm; 13.0 kg · m; 94 ftlb
The cylinder head is made of cast iron with a cross flow intake and exhaust design. The camshaft journal part of the cylinder head has camshaft caps made of aluminum alloy and is made of cast iron on the side of the cylinder head. The camshaft is driven by the timing belt.
The 1HD-T engine is an OHV design with two valves per cylinder. The intake valves are 42.5 mm (1.6732 in) diameter and the exhaust valves are 36.0 mm (1.4173 in). The exhaust and intake valves are equipped with step springs …