The 1KZ-T engine has a cast iron block with 96.0 mm (3.78 in) cylinder bores and a 103.0 mm (4.06 in) piston stroke for a 3.0 L capacity . The compression ratio is 21.2: 1. The engine has an aluminum alloy cylinder head with single overhead camshaft (SOHC), mechanical indirect fuel injection system and Toyota CT12B turbocharger.
Toyota’s first version of the 1KZ-T produced 126 PS (93 kW; 125 HP) at 3,600 rpm of horsepower and 287 Nm (29.3 kg · m; 211.8 ft · lb) at 2,000 rpm of torque.
The engine code breakdown is as follows:
- 1 – 1st generation engine
- KZ – Engine family
- T – turbocharged
|Displacement||3.0 liters, 2.982 cm 3 (181.97 cubic inches)|
|Power adder||Toyota CT12B|
|Horsepower network||126 PS (93 KW; 125 HP) @ 3,600 rpm|
|Torque output||287 Nm (29.3 kg · m; 211.8 ft · lb) at 2000 rpm|
|Firing order (injection)||1-3-4-2|
|Dimensions (L x H x W):||–|
The cylinder block has a high-strength cast iron monobloc construction with the five-bearing support system. The cylinder bores were ground to a plateau for more efficient piston ring sealing. The 1KZ-T engine is equipped with a fully balanced steel crankshaft that has five main journals and is powered by aluminum alloy bearings.
The connecting rods are made of light carbon steel and each connecting rod has an internal oil passage that supplies an oil gallery to the piston. The pistons are made of aluminum alloy. Each piston is equipped with two compression rings and one oil control ring. The cylinder bore is 96.0 mm (3.78 in.), The piston stroke is 103.0 mm (4.06 in.), And the compression ratio is 21.2: 1.
|Cylinder Block Alloy||Molten iron|
|Compression ratio:||21.2: 1|
|Cylinder bore:||96.0 mm (3.78 inches)|
|Piston stroke:||103.0 mm (4.06 inches)|
|Number of piston rings (compression / oil):||2/1|
|Number of main bearings:||5|
|Cylinder bore inner diameter:||96.000-96.010 mm (3.7795-3.7799 inches)|
|Piston skirt diameter||95.940-95.950 mm (3.7772-3.7776 inches)|
|Piston ring groove:||First||0.060-0.110 mm (0.0024-0.0043 inch)|
|Second||0.060-0.100 mm (0.0024-0.0039 inch)|
|Petroleum||0.020-0.060 mm (0.0009-0.0024 inch)|
|Piston Ring End Gap:||First||0.350-0.570 mm (0.0138-0.0224 inch)|
|Second||0.400-0.600 mm (0.0157-0.0236 inch)|
|Petroleum||0.200-0.500 mm (0.0079-0.0197 inch)|
|Piston pin outside diameter||34.000-34.012 mm (1.3386-1.3391 inches)|
|Piston pin hole diameter||34.012-34.024 mm (1.3391-1.3395 inches)|
|Diameter of main crankshaft journal:||69.994-70.000 mm (2.7557-2.7559 inches)|
|Crankpin diameter:||58,994-59,000 mm (2.3226-2.3228 inches)|
Main bearing cap adjustment procedure and torque specifications:
- Step 1: 49 Nm; 5.0 kg · m; 36 ftlb
- Step 2: Turn all screws 90 °
After securing the bearing cap bolts, make sure the crankshaft turns smoothly by hand.
Connecting rod cap
- Step 1: 29 Nm; 3.0 kg · m; 22 ftlb
- Step 2: Turn all screws 90 °
Crankshaft pulley bolt
- 363 Nm; 37.0 kg · m; 268 ftlb
Flywheel (M / T) or Drive Plate (A / T) Fixing Bolts
- 145 Nm; 14.8 kg · m; 107 ftlb
The 1KZ-T has an aluminum alloy cylinder head with a cross flow configuration that is mounted on a steel rolled type cylinder head gasket and has pinch bolts in the plastic region. The engine has a high quality steel overhead camshaft (SOHC) and two valves per cylinder: one intake and one exhaust (8 valves total). The camshaft is driven by a timing belt and gears.
The intake valves are 42.5 mm (1.6732 in) in diameter and the exhaust valves are 37.0 mm (1.4567 in). The Toyota 1KZ-T engine does not have hydraulic lifters, so special shims are used to adjust the valve clearance. Shims are available in 17 sizes from 2.50 mm (0.0984 in.) To 3.30 mm (0.1299 in.), In steps of 0.05 mm (0.0020 …