Nissan CD17 Specifications
| Engine Model: Nissan CD17 |
| Engine Type: 4-cycle inline 4-cylinder OHV 8-valve naturally aspirated liquid-cooled diesel |
| Total Displacement: 102.6 cu.in (1.68 L) |
| Rated Engine Power: 55-58 Hp (41-43 kW) at 4800 rpm |
| Fuel System Type: Mechanical fuel injection |
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The Nissan CD17 is a 1.7-liter inline-four
diesel engine developed by Nissan as part of the CD-series, created to
provide maximum durability, fuel efficiency, and simple maintenance for
small passenger cars and light-duty applications. Produced mainly
throughout the 1980s and early 1990s, the CD17 found widespread use in
Nissan Sunny, Sentra, Pulsar, and other compact vehicles where economy
and long service life were more important than high performance.
The CD17 features a cast-iron block and cast-iron head, an
indirect-injection (IDI) swirl-chamber combustion design, mechanical
fuel injection, gear-driven auxiliaries, and conservative operating
speeds. These engineering choices deliver exceptional reliability,
excellent cold-start behavior compared to early direct-injection
engines, and low running costs. Although modest in output, the CD17
gained a strong reputation among fleet operators and commuters due to
its ability to exceed hundreds of thousands of km with basic care.
The CD17 is a four-stroke, inline-four diesel engine with a displacement
of 1680 cc, or 102.6 cubic inches. It uses a bore of 80.0 mm (3.15
inches) and a stroke of 83.6 mm (3.29 inches), producing a slightly
undersquare configuration optimized for low-rpm torque and fuel economy.
The compression ratio is approximately 22.5:1, typical for
indirect-injection diesels, allowing high thermal efficiency and
reliable combustion even in cold climates.
Maximum power output is roughly 55 to 58 horsepower (41 to 43 kW) at
around 4800 rpm. Peak torque is approximately 100 to 105 Nm (74 to 77
lb-ft) at about 2400 rpm. The firing order is 1-3-4-2. Idle speed is
typically 750 to 850 rpm. Redline and governor-controlled maximum speed
occur near 5000 rpm, though the CD17 operates most efficiently below
3500 rpm.
The CD17 block is made of heavy-duty cast iron for structural rigidity,
longevity, and high resistance to wear. The cylinders are integrated
directly into the block, providing excellent heat stability and reduced
distortion. The forged-steel crankshaft runs on five main bearings,
minimizing crank flex and vibration, especially during extended
high-load operation. Connecting rods are forged steel with full-floating
wrist pins to improve durability and reduce friction.
Pistons are aluminum alloy, containing steel struts for controlled
expansion and improved strength under high compression loads. The piston
crowns incorporate cavities shaped to interact precisely with the
swirl-chamber pre-chambers in the cylinder head to promote efficient
mixture swirl and combustion. Piston rings include two compression rings
and one oil-control ring.
The oil pump is gear-driven from the crankshaft, ensuring consistent
lubrication regardless of temperature or rpm. The bottom end is
engineered conservatively, allowing the CD17 to survive sustained
high-mileage use under demanding conditions with minimal wear.
The cylinder head is cast iron and houses four pre-combustion chambers,
one for each cylinder. It features a swirl-chamber IDI design, enhancing
air-fuel mixing prior to ignition. The head incorporates two valves per
cylinder, one intake and one exhaust, totaling eight valves. The
valvetrain uses an overhead-valve (OHV) configuration with the camshaft
located inside the block. The camshaft is belt-driven and actuates the
valves through lifters, pushrods, and rocker arms. This simple
valvetrain architecture is rugged and allows straightforward service.
Valve clearances must be adjusted periodically, every 20,000 km. Cold
valve lash is generally set to 0.30 mm (0.012 inches) for intake valves
and 0.35 mm (0.014 inches) for exhaust valves. Combustion is smooth for
a diesel of this era, thanks to the IDI arrangement, which also
contributes to lower combustion noise compared with early
direct-injection engines.
The fuel system is purely mechanical. A cam-driven mechanical lift pump
draws diesel fuel from the tank and passes it through a primary water
separator and then through a fine secondary fuel filter. Fuel then
enters the distributor-type mechanical injection pump, which meters and
pressurizes fuel for each cylinder.
High-pressure lines deliver fuel to pintle-type injectors located above
the swirl chambers. Injection pressures are approximately 120 MPa
(17,400 psi). Injection timing is manually set and must be checked
during major service.
During cold weather, four glow plugs—one per cylinder—preheat the
pre-combustion chambers. Glow time typically ranges from 5 to 10 seconds
depending on temperature. The swirl-chamber IDI system allows smoother
starting during cold conditions and reduces white smoke emissions.
Fuel economy is one of the CD17’s strongest qualities. Consumption
typically ranges between 4.5 and 5.5 liters per 100 km (approximately 43
to 52 mpg), depending on driving style and vehicle weight.
The lubrication system is a fully pressurized wet-sump design. The
crankshaft-driven gear pump pulls oil through a strainer in the sump
before pumping it through a full-flow spin-on filter. Oil is delivered
to the main bearings, rod bearings, camshaft bearings, rocker arms, and
valve train components.
The oil pressure at 3000 rpm measures approximately 300 to 400 kPa (43
to 58 psi), while idle pressure remains above 70 kPa (10 psi). Total oil
capacity with filter is roughly 3.5 liters (3.7 US quarts, 3.1 imperial
quarts). Recommended oil viscosity ranges from 10W-30 to 15W-40, using
diesel-rated API CF or higher oils due to soot-suspension requirements.
The CD17 uses a liquid cooling system with a belt-driven centrifugal
water pump. Coolant circulates through the block, head, radiator, and
heater core. The thermostat opens at around 82°C (180°F) and is fully
open near 95°C (203°F). Cooling system capacity is roughly 6.5 liters
(6.9 US quarts). Most applications use a mechanical cooling fan,
although some models include an electric fan. Regular coolant
replacement prevents corrosion in the cast-iron components.
| Intake and Exhaust Systems |
The air induction system consists of a replaceable dry-paper air filter,
air ducting, and an aluminum intake manifold designed to promote strong
swirl. Because the CD17 is naturally aspirated, intake pressures remain
at ambient levels. The exhaust manifold is cast iron and connects to a
simple exhaust pipe and, in some markets, a catalytic converter. Exhaust
gas temperatures are moderate compared to turbocharged diesels,
contributing to long manifold life.
| Electrical and Starting Systems |
As a diesel engine, the CD17 does not require an ignition coil,
distributor, or spark plugs. Instead, compression ignition is aided by
electrically heated glow plugs during starting. The glow plugs are
controlled by a relay triggered by the cold-start system.
The alternator provides 50 to 60 amperes depending on application,
supplying power for vehicle accessories and battery charging. The
starter motor is a high-torque reduction-gear unit designed to overcome
the high compression ratio of the diesel engine.
The Positive Crankcase Ventilation (PCV) system vents blow-by gases into
the intake to reduce emissions and prevent sludge formation. Some
variants include Exhaust Gas Recirculation (EGR) to reduce NOx
emissions. Early diagnostic functionality is basic and non-OBD.
The CD17 is compact and lightweight relative to its robustness.
Approximate dimensions are: length 680 mm (26.8 inches), width 600 mm
(23.6 inches), and height 700 mm (27.6 inches). Dry weight is roughly
150 kg (331 lbs). Its compact size made it ideal for transverse
front-wheel-drive layouts.
Routine maintenance ensures exceptional longevity. Oil and filter
changes are recommended every 5000 to 7500 km (3000 to 4500 miles). Fuel
filter replacement is essential for diesel durability and should occur
every 20,000 km (12,000 miles). Air filter replacement is typically
performed every 20,000 km or more frequently in dusty environments.
Valve lash should be adjusted every 20,000 km.
Glow plugs should be tested annually or when cold-start difficulty
arises. Coolant should be replaced every 40,000 km or every two years.
Timing belt replacement is required every 100,000 km (60,000 miles).
Compression pressures should measure between 3.0 and 3.5 MPa (435 to 508
psi), with no more than 0.3 MPa (45 psi) difference across cylinders.
Cylinder head bolts tighten to 108 Nm (80 lb-ft).
Main bearing cap bolts tighten to 78 Nm (58 lb-ft).
Connecting rod bolts tighten to 44 Nm (33 lb-ft).
Rocker shaft bolts tighten to 30 Nm (22 lb-ft).
Glow plug torque is 15 Nm (11 lb-ft).
Injector retainer bolts tighten to 22 Nm (16 lb-ft).
Flywheel bolts tighten to 108 Nm (80 lb-ft).
Oil drain plug tightens to 35 Nm (26 lb-ft).
Intake manifold bolts tighten to 25 Nm (18 lb-ft).
Exhaust manifold bolts tighten to 35 Nm (26 lb-ft).
The CD17 engine was widely used in compact Nissan vehicles such as the
Nissan Sunny (B11 and B12), Nissan Pulsar (N12), Nissan Sentra diesel
variants, and certain export-market small sedans and hatchbacks. Known
for extreme fuel efficiency and long service life, it became popular in
taxi fleets, high-mileage commuter cars, and regions with limited access
to advanced diagnostic service tools.
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