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Nissan E15 Specifications
| Engine Model: Nissan E15 |
| Engine Type: 4-cycle inline 4-cylinder OHV 8-valve liquid-cooled gasoline |
| Total Displacement: 90.8 cu.in (1.49 L) |
| Rated Engine Power: 70-75 Hp (52-55 kW) at 5000 rpm |
| Fuel System Type: Single-barrel or twin-barrel downdraft carburetor |
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| General Technical Data |
The Nissan E15 engine is a 1.5-liter inline-four, four-stroke, water-cooled gasoline engine developed as part of Nissan’s E-series during the late 1970s and 1980s. It was designed for compact front-wheel-drive and rear-wheel-drive passenger cars, including the Nissan Sunny, Pulsar, Cherry, Sentra, and regional variants. The E15 engine served as a reliable and economical powerplant intended for everyday transportation, prioritizing durability, simplicity, and low maintenance costs.
Featuring a cast-iron cylinder block, aluminum
overhead-valve cylinder head, mechanical distributor ignition, and
either a carburetor or early electronic fuel injection system, the
engine balanced proven mechanical construction with incremental
technological updates for emissions and drivability. The E15 existed in
several forms: the base carbureted E15, the electronically injected
E15E, and the turbocharged E15ET. Its robust construction and
straightforward serviceability made it popular among mechanics and
owners alike.
The Nissan E15 has a total displacement of 1,488 cc (90.8 cubic inches).
Bore is 76.0 mm (2.99 in) and stroke is 82.0 mm (3.23 in), producing a
long-stroke geometry that favors low-speed torque and efficient
combustion. The compression ratio varies by version: approximately 9.0:1
for carbureted variants, approximately 9.4:1 for the E15E fuel-injected
version, and approximately 7.5–8.0:1 for turbocharged models.
Power output is approximately 70–75 horsepower
for carbureted versions, approximately 85 horsepower for the E15E, and
approximately 110 horsepower for the E15ET. Torque output ranges from
approximately 80–120 lb-ft (108–163 Nm). Idle speed is typically 700 ±
50 rpm. Firing order is 1–3–4–2. Operating characteristics emphasize
stable idle, predictable throttle response, and moderate rpm limits
suitable for daily use.
The cast-iron engine block provides high rigidity and excellent thermal
stability. Five main bearings support the forged-steel crankshaft,
ensuring smooth rotation and long-term reliability. Pistons are
cast-aluminum alloy with two compression rings and one oil-control ring.
Connecting rods are forged steel. The deep-skirt block design improves
structural integrity and reduces engine noise.
The cylinder head is an aluminum wedge-type design featuring two valves
per cylinder operated by a block-mounted camshaft through pushrods and
rocker arms. This overhead-valve (OHV) arrangement was selected for
cost-effectiveness, strength, and ease of service. Valve lash is
manually adjustable using rocker-arm screws and requires periodic
inspection.
Intake and exhaust ports are positioned to promote mixture velocity and efficient combustion, while the combustion chamber shape supports stable burn characteristics. The head is designed to resist detonation and overheating when coolant maintenance is observed.
| Fuel System |
The fuel system varies significantly depending on engine version.
Carbureted E15:
A single-venturi or two-stage downdraft carburetor meters fuel for base
models. Later versions integrate an electronic feedback system using an
oxygen sensor, mixture-control solenoids, and temperature switches to
adjust mixture for emissions compliance. Fuel is delivered by a
mechanical diaphragm pump driven by the camshaft. Carburetor designs
include choke units (manual or automatic), vacuum-operated secondaries,
and accelerator pumps.
E15E (EFI):
The E15E uses an electronically controlled multi-point fuel-injection
system. An in-tank electric pump supplies fuel at approximately 300 kPa
(43 psi) to a rail feeding solenoid-operated injectors. The ECU monitors
engine load, air mass, coolant temperature, intake-air temperature,
oxygen content, and throttle position. Fuel delivery is precisely
metered for improved drivability, emissions, and warm-start performance.
E15ET (Turbo):
Turbocharged variants include boosted carburetion or EFI depending on
market. Mixture control incorporates enrichment for boost, altered
timing curves, and reinforced fuel-delivery components.
| Lubrication System |
The lubrication system is a fully pressurized wet-sump design. A
trochoid oil pump driven by the crankshaft supplies pressurized oil to
the main oil gallery feeding main bearings, connecting-rod bearings,
camshaft bearings, and valvetrain contact points. A replaceable spin-on
oil filter ensures full-flow filtration. Piston-cooling jets are not
included, although turbocharged models may integrate additional cooling
provisions.
– Oil capacity: approx. 3.5 liters (3.7 US quarts)
– Normal oil pressure: approx. 45–55 psi at 3,000 rpm; approx. 10–15 psi
at idle
– Recommended viscosity: SAE 10W-30 or 10W-40 depending on ambient
temperature
Turbocharged versions require more frequent oil changes to protect
turbocharger bearings.
| Cooling System |
The cooling system is a liquid-based forced-circulation design using a belt-driven centrifugal water pump. Coolant circulates through internal block and cylinder-head passages, the radiator, and the heater core. The thermostat begins to open at approximately 82°C (180°F) and is fully open by approximately 95°C (203°F).
Cooling-system capacity is approximately 5.5–6.0 liters (5.8–6.3 US quarts). Radiator construction uses aluminum cores with plastic or metal side tanks. Engine cooling fans are either belt-driven or electric, depending on vehicle model and climate package. A coolant reservoir maintains expansion volume. Coolant type should be a 50/50 ethylene-glycol mixture.0
| Intake and Exhaust Systems |
Induction components include an air-cleaner housing with replaceable
paper filter, intake ducting, and an intake manifold made of cast
aluminum or cast iron. EFI versions use an aluminum manifold with tuned
runners designed for improved airflow distribution. Carbureted versions
incorporate hot-air intake ducts for cold-weather operation.
The exhaust system uses a cast-iron manifold feeding a single downpipe.
Catalytic converters and oxygen sensors appear on emissions-compliant
versions. Turbocharged E15ET models use reinforced turbo manifolds
capable of handling elevated exhaust temperatures. Boost pressure is
generally modest to preserve engine longevity.
| Ignition and Electrical System |
The ignition system is distributor-based. A single ignition coil provides high voltage, while the distributor routes spark to each cylinder. Timing advance is controlled by both centrifugal and vacuum mechanisms. Later versions include integrated electronic ignition modules for improved spark stability at higher rpm. Spark-plug gap is typically 0.8–1.0 mm (0.031–0.039 in).
Recommended plugs vary by engine version; turbo models use colder heat-range plugs. Electrical power is supplied by a 12-volt alternator with output capacity between 45 and 60 amperes depending on model. The starter motor is a direct-drive or reduction-gear type.
| Dimensions and Weight |
– Length: approx. 580–620 mm (22.8–24.4 in)
– Width: approx. 560 mm (22.0 in)
– Height: approx. 650 mm (25.6 in)
Dry weight varies depending on
configuration:
– E15 carbureted: approx. 120–130 kg (265–287 lb)
– E15E fuel injected: approx. 125–135 kg (275–298 lb)
– E15ET turbocharged: approx. 135–145 kg (298–320 lb)
| Maintenance Data |
– Oil and filter replacement: every 5,000 km (3,000 mi)
– Air-filter replacement: every 20,000 km (12,000 mi)
– Fuel filter: 20,000–30,000 km (carb), approx. 40,000 km (EFI)
– Spark plugs: every 20,000–30,000 km depending on type
– Valve lash adjustment: every major service interval
– Coolant replacement: every 2 years
– Carburetor tuning: as required for smooth idle and emissions
– EFI systems: periodic sensor inspection and throttle-body cleaning
– Turbo systems: check hoses, clamps, and turbo bearings regularly
Compression pressure for a healthy E15 engine typically ranges from
approx. 150–170 psi with less than 10% variation between cylinders. Idle
speed is typically 700 rpm. Ignition timing is adjusted manually by
rotating the distributor according to factory specifications.
| Tightening Torques |
– Cylinder-head bolts: 65–75 lb-ft (88–102 Nm)
– Main-bearing-cap bolts: 55–65 lb-ft (75–88 Nm)
– Connecting-rod bolts: 30–35 lb-ft (40–48 Nm)
– Flywheel bolts: 70–80 lb-ft (95–108 Nm)
– Intake-manifold bolts: 16–18 lb-ft (22–25 Nm)
– Exhaust-manifold nuts: 20–25 lb-ft (27–34 Nm)
– Spark plugs: 13 lb-ft (18 Nm)
– Oil drain plug: 25–30 lb-ft (34–40 Nm)
| Vehicle Applications |
The Nissan E15 engine was used in a wide
range of compact passenger cars across global markets, including:
– Nissan Sunny B11 and early B12
– Nissan Pulsar and Cherry
– Nissan Sentra (early North-American carbureted models)
– Nissan Langley and related regional derivatives
– Select sporty models equipped with the E15ET turbocharged variant
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