The Nissan / Datsun L28ET is a 2.8 liter (2753 cc) six cylinders inline, four-stroke cycle water-cooled turbocharged internal combustion gasoline engine from Nissan L-family.
The Nissan / Datsun L28ET engine features a cast-iron block, a wedge-shaped combustion chamber, aluminum head with overhead camshaft and a fully balanced 7-bearing crankshaft. The cylinder block is cast in a single unit and features deep skirting. The L28ET is equipped with electronic multiport fuel injection system, a single Garrett AiResearch TB03 internally wastegated turbocharger without intercooler and new engine control system, Nissan’s Electronic Concentrated Control System (ECCS).
It has an 86 mm (3.39 in) cylinder bore and 79 mm (3.11 in) piston stroke with. Compression ratio rating is 7.4:1 The L28ET turbo produced from 182 PS (134 kW; 180 HP) of horsepower and 274 Nm (27.95 kg·m; 202.21 ft·lb) of torque.
The breakdown of the engine code is as follows:
- L – Engine Family
- 28 – 2.8 Liter Displacement
- E – Multi Point Fuel Injection
- T – Turbocharger
General information
| Engine Specifications | |
| Engine code | L28ET |
| Layout | Four stroke, Inline-6 (Straight-6) |
| Fuel type | Gasoline |
| Production | 1980-1983 |
| Displacement | 2.8 L, 2,753 cc (168.0 cu in) |
| Fuel system | Multiport Fuel Injection |
| Power adder | Turbocharger Garrett AiResearch TB03/td> |
| Max. horsepower | 182 PS (134 kW; 180 HP) |
| Max. torque | 274 Nm (27.95 kg·m; 202.21 ft·lb) |
| Firing order | 1-5-3-6-2-4 |
| Dimensions (L x H x W): | – |
| Weight | – |
Cylinder block
The L28ET engine has a cast-iron cylinder block, bore is 86 mm (3.39 in) and stroke is 79 mm (3.11 in). The cylinder block, a monoblock specially cast structure, employs the seven bearing support system for quietness and higher durability. The compression ratio rating is 7.4:1.
| Cylinder block | ||
| Cylinder block alloy | Cast iron | |
| Compression ratio: | 7.4:1 | |
| Cylinder bore: | 86 mm (3.39 in) | |
| Piston stroke: | 79 mm (3.11 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 7 | |
| Cylinder inner diameter (standard): | 86.000-86.050 mm (3.3858-3.3878 in) | |
| Piston skirt diameter (standard): | 85.965-86.015 mm (3.3844-3.3864 in) | |
| Piston pin outer diameter: | 20.993-20.998 mm (0.8265-0.8267 in) | |
| Piston ring side clearance: | Top | 0.040-0.073 mm (0.0016-0.0029 in) |
| Second | 0.030-0.063 mm (0.0012-0.0025 in) | |
| Oil | 0.023-0.070 mm (0.0009-0.0028 in) | |
| Piston ring end gap: | Top | 0.25-0.40 mm (0.0098-0.0157 in) |
| Second | 0.15-0.30 mm (0.0059-0.0118 in) | |
| Oil | 0.30-0.90 mm (0.012-0.035 in) | |
| Connectin rod small end inner diameter: | 20.965-20.978 mm (0.8254-0.8259 in) | |
| Crankshaft journal diameter: | 54.942-54.955 mm (2.1631-2.1336 in) | |
| Crankpin diameter: | 49.961-49.974 mm (1.9670-1.9675 in) | |
| Crankshaft center distance: | 39.50 mm (1.5551 in) | |
Cylinder head
The L20ET has a SOHC design (single overhead camshaft) with twelve valves (two per cylinder). The cylinder head is made of a light, strong aluminum alloy with good cooling efficiency. Intake valves are 44 mm (1.73 in) in diameter and the exhaust valves are 35 mm (1.37 in). The early versions of L28ET were equipped with adjustable mechanical rockers though these were phased out after September 1982 in favor of hydraulic rockers.
| Cylinder head (1981-1983 specs) | ||
| Valve Arrangement: | OHV, chain drive | |
| Valves: | 12 (2 valves per cylinder) | |
| Intake/Exhaust duration: | For USA: 240° / 248° For Canada: 248° / 248° | |
| Valve head diameter: | INTAKE | 44.0 mm (1.732 in) |
| EXHAUST | 35.0 mm (1.378 in) | |
| Valve length: | INTAKE | 112.8-113.1 mm (4.4409-4.4527 in) |
| EXHAUST | 113.6-113.9 mm (4.4724-4.4842 in) | |
| Valve stem diameter: | INTAKE | 7.965-7.980 mm (0.3136-0.3142 in) |
| EXHAUST | 7.945-7.960 mm (0.3128-0.3134 in) | Cam height: | INTAKE | For USA: 39.95-40.00 mm (1.5728-1.5748 in) For Canada: 40.30-40.35 mm (1.5866-1586 in) |
| EXHAUST | For USA and Canada:40.30-40.35 mm (1.5866-1586 in) | |
| Outer camshaft journal diameter: | 47.949-47.962 mm (1.8878-1.8883 in) | |
Tightening torque specs
| Tightening torque specs | |
| Main bearing cap bolt | 44-54 Nm; 4.5-5.5 kg·m; 33-40 ft·lb |
| Connecting rod big end nut | 44-54 Nm; 4.5-5.5 kg·m; 33-40 ft·lb |
| Flywheel bolt (M/T) | 127-147 Nm; 13.0-15.0 kg·m; 94-108 ft·lb |
| Drive plate bolt (A/T) | 127-147 Nm; 13.0-15.0 kg·m; 94-108 ft·lb |
| Cylinder head bolt | 78-88 Nm; 8.0-9.0 kg·m; 58-65 ft·lb |
| Cylinder head to front cover bolt | 8-14 Nm; 0.8-1.4 kg·m; 5.8-10.1 ft·lb |
| Pivot bushing bolt | 78-118 Nm; 8.0-12.0 kg·m; 58-87 ft·lb |
| Pivot lock nut | 49-59 Nm; 5.0-6.0 kg·m; 36-46 ft·lb |
| Camshaft sprocket bolt | 127-147 Nm; 13.0-15.0 kg·m; 94-108 ft·lb |
| Chain guide / tensioner bolt | 6-10 Nm; 0.6-1.0 kg·m; 4.3-7.2 ft·lb |
| Oil pump bolt | 11-15 Nm; 1.1-1.5 kg·m; 8-11 ft·lb |
| Crank pulley nut | 137-157 Nm; 14.0-16.0 kg·m; 101-116 ft·lb |
| Rocker cover bolt | 10-16 Nm; 1.0-1.6 kg·m; 7-12 ft·lb |
| Spark plug | 15-20 Nm; 1.5-2.0 kg·m; 11-14 ft·lb |
| Water outlet bolt | 12-20 Nm; 1.2-2.0 kg·m; 9-14 ft·lb |
| Thermostat housing | 10-16 Nm; 1.0-1.6 kg·m; 7-12 ft·lb |
| Distributor support bolt | 4-8 Nm; 0.4-0.8 kg·m; 2.9-5.8 ft·lb |
| Alternator bracket | 39-59 Nm; 4.0-6.0 kg·m; 29-43 ft·lb |
| Engine mouting bracket | 29-39 Nm; 3.0-4.0 kg·m; 22-29 ft·lb |
| Fuel pump nut | 12-18 Nm; 1.2-1.8 kg·m; 9-13 ft·lb |
Maintenance data
| Valve clearance (HOT) | |
| Intake valve | 0.25 mm (0.010 in) |
| Exhaust valve | 0.30 mm (0.012 in) | Valve clearance (COLD) |
| Intake valve | 0.17 mm (0.007 in) |
| Exhaust valve | 0.24 mm (0.009 in) |
| Compression pressure | |
| Standard | 10.0 kg/cm2 (981 kPa, 142 psi) / 350 rpm |
| Minimun | 7.0 kg/cm2 (686 kPa, 100 psi) / 250 rpm |
| Oil system | |
| Oil consumption , L/1000 km (qt. per miles) | up to 0.5 (1 qt. per 1200 miles) |
| Recommended engine oil | 5W-30 5W-40 10W-30 10W-40 |
| Oil type API | SE |
| Engine oil capacity (Refill capacity) | With filter change 4.5 l (4-3/4 US qt, 4 Imp qt) Without filter change 4.0 l (4-1/4 US qt, 3-1/2 Imp qt) |
| Oil change interval, km (miles) | 12,000 (7,500) or 6 mounths |
| Ignition system | |
| Ignition timing | 21-27° B.T.D.C at 650-750 |
| Spark plug | Cold: BPR7ES-11 Standard: BPR6ES-11 Hot: BPR5ES-11 |
| Spark plug gap | 1.0-1.1 mm (0.039-0.043 in) |
Vehicle applications
| Model | Years Produced |
| Datsun 280ZX | 1980-1983 |
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