________________________________________________________________________________________
| Home / Car Engines / Toyota Engines / Toyota 1KZ-T |
Toyota 1KZ-T Engine Specifications
The Toyota 1KZ-T is a 3.0 l (2,982 cc, 181.97 cubic inches) four
cylinders, 4-stroke water-cooled turbocharged internal combustion diesel
engine, manufactured by the Toyota Motor Corporation.
The Toyota 1KZT 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 capacity of 3.0 l.
Compression ratio rating 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.
The Toyota first version of 1KZT produced 126 PS (93 kW; 125 HP) at
3,600 rpm of horsepower and 287 Nm (29.3 kgm; 211.8 ft-lb) at 2,000 rpm
of torque.
Engine code identification:
1 - 1nd generation engine
KZ - Engine family
T - Turbocharged
| GENERAL TECHNICAL DATA |
Engine model ............... 1KZ-T
Cylinder layout ............... Straight-4, vertical
Fuel type ............... Diesel
Production ............... No data available
Total displacement ............... 3.0 L, 2,982 cm 3 (181.97 cubic
inches)
Injection pump ............... Mechanical
Power adder ............... Toyota CT12B
Rated power ............... 126 PS (93 KW; 125 HP) at 3,600 rpm
Torque output ............... 287 Nm (29.3 kgm; 211.8 ft-lb) at 2,000
rpm
Firing (enjection) order ............... 1-3-4-2
Dimensions (L x H x W) ............... No data available
Weight ...............
| CYLINDER BLOCK |
The cylinder block has a monoblock high-strength cast-iron structure
with the five-bearing-support system. The cylinder bores were plateau
honed for more efficient piston ring sealing. The 1KZ-T engine is
equipped with a fully balanced steel crankshaft that has five main
journals and operated on aluminum alloy bearings.
The connecting rods are made from lightweight carbon steel and each rod
has an internal oil passage which supplied an oil gallery in the piston.
The pistons are made from aluminum alloy. Each piston is fitted with two
compression and one oil control rings. The cylinder bore is 96.0 mm
(3.78 in), piston stroke is 103.0 mm (4.06 in) and compression ratio
rating is 21.2:1.
Cylinder block alloy ............... Cast iron
Compression ratio ............... 21.2:1
Cylinder bore ............... 96.0 mm (3.78 in)
Piston stroke ............... 103.0 mm (4.06 in)
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 in)
Piston skirt diameter ............... 95.940-95.950 mm (3.7772-3.7776
in)
Piston ring groove ............... First ............... 0.060-0.110 mm
(0.0024-0.0043 in)
Second ............... 0.060-0.100 mm (0.0024-0.0039 in)
Oil ............... 0.020-0.060 mm (0.0009-0.0024 in)
Piston ring end gap ............... First ............... 0.350-0.570 mm
(0.0138-0.0224 in)
Second ............... 0.400-0.600 mm (0.0157-0.0236 in)
Oil ............... 0.200-0.500 mm (0.0079-0.0197 in)
Piston pin outer diameter ............... 34.000-34.012 mm
(1.3386-1.3391 in)
Piston pin bore diameter ............... 34.012-34.024 mm (1.3391-1.3395
in)
Crankshaft main journal diameter ............... 69.994-70.000 mm
(2.7557-2.7559 in)
Crankpin diameter ............... 58.994-59.000 mm (2.3226-2.3228 in)
Main bearing cap tightening procedure and torque specs:
Step 1: 49 Nm; 5.0 kgm; 36 ft-lb
Step 2: Turn all bolts 90deg
After securing bearing cap bolts, make sure crankshaft turns smoothly by
hand.
Connecting rod cap
Step 1: 29 Nm; 3.0 kgm; 22 ft-lb
Step 2: Turn all bolts 90deg
Crankshaft pulley bolt
363 Nm; 37.0 kgm; 268 ft-lb
Flywheel (M/T) or Drive plate (A/T) fixing bolts
145 Nm; 14.8 kgm; 107 ft-lb
| CYLINDER HEAD |
The 1KZ-T has an aluminum alloy cylinder head with a cross-flow
configuration which is mounted on a steel laminate type head gasket and
had plastic region tightening bolts. The engine has single overhead
(SOHC) high-quality steel camshaft and two valves per cylinder: one
intake and one exhaust (8 valves in total). The camshaft is driven by a
timing belt and gears.
Intake valves are 42.5 mm (1.6732 in) in diameter, and the exhaust
valves are 37.0 mm (1.4567 in). The Toyota 1KZT 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 in).
Cylinder head alloy ............... Aluminium
Valve Arrangement ............... SOHC
Valves ............... 4 (2 valves per cylinder)
Intake valves diameter ............... 42.5 mm (1.6732 in)
Exhaust valves diameter ............... 37.0 mm (1.4567 in)
Intake valves length ............... 103.29-103.69 mm (4.0665-4.0822 in)
Exhaust valves length ............... 103.29-103.69 mm (4.0665-4.0822
in)
Intake valve stem diameter ............... 7.975-7.990 mm (0.3140-0.3146
in)
Exhaust valves stem diameter ............... 7.960-7.975 mm
(0.3134-0.3140 in.l
Camshaft journal diameter ............... 27.969-27.985 mm
(1.1011-1.1018 in)
Intake cam lobe height ............... 54.810-54.910 mm (2.1579-2.1618
in)
Exhaust cam lobe height ............... 56.140-56.240 mm (2.2102-2.2142
in)
Head tightening procedure and torque specs:
Step 1: 39 Nm; 4.0 kgm; 29 ft-lb
Step 2: Turn all bolts 90deg
Step 3: Turn all bolts 90deg
Camshaft bearing cap
18 Nm; 1.85 kgm; 13 ft-lb
| MAINTENANCE DATA |
Valve clearance (Cold)
Intake valve ............... 0.20-0.30 mm (0.008-0.012 in)
Exhaust valve ............... 0.25-0.35 mm (0.010-0.014 in)
Compression pressure
Standard ............... 31.0 kg/m2 (3,040 kPa, 441 psi)
Minimum ............... 20.0 kg/m2 (1,961 kPa, 284 psi)
Compression differential limit between cylinders ............... 5.0
kg/m2 (490 kPa, 71 psi)
Oil system
Recommended engine oil ............... 10W-30 or 10W-40 (CF, CE, CD)
Engine oil capacity ............... Dry fill: 7.5 L (7.9 US qt, 6.6 Imp.
qt)
With oil filter change: 7.0 L (7.4 US qt, 6.2 Imp. qt)
Without oil filter change: 6.4 L (6.8 US qt, 5.6 Imp. qt)
Oil pressure ............... Idle speed: 0.3 kgf/cm2 (29 kPa, 4.3 psi)
At 3,000 rpm: 2.5 kgf/cm2 (245 kPa, 33 psi)
| VEHICLE APPLICATIONS |
Model ............... Years Produced
Toyota Land Cruiser Prado (KZJ71W, KZJ78W) ............... No data
available
Toyota 4Runner (KZN130L) ............... No data available
________________________________________________________________________________________
________________________________________________________________________________________
| Engines Technical Specifications |