Honda D14A2 Specifications
| Engine Model: Honda D14A2 |
| Engine Type: 4-cycle inline 4-cylinder SOHC 16-valve liquid-cooled gasoline |
| Total Displacement: 85.2 cu.in (1.39 L) |
| Rated Engine Power: 88-90 Hp (66-67 kW) at 6300 rpm |
| Fuel System Type: Programmed fuel injection (PGM-FI) |
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The Honda D14A2 engine is a compact, reliable,
and fuel-efficient inline four-cylinder gasoline engine developed for
European-market Honda Civic models during the late 1990s. As part of
Honda's D-series family, the D14A2 emphasizes mechanical simplicity,
smooth daily drivability, and low operating cost. Using an aluminum
single overhead camshaft cylinder head, cast-iron block, lean-oriented
intake design, and multi-point fuel injection, the D14A2 delivers
dependable performance with strong fuel efficiency.
The engine's conservative power output, durable
rotating assembly, and straightforward mechanical systems make it an
ideal choice for economical vehicles. Its long service life, minimal
maintenance requirements, and predictable mechanical characteristics
parallel the practicality found in Isuzu's small industrial engines,
although optimized for gasoline passenger car use.
The Honda D14A2 is a four-stroke, water-cooled, inline four-cylinder
gasoline engine. Total displacement is approximately 1,396 cc, or 85.2
cubic inches. The bore measures 75.0 mm, or 2.95 inches, and the stroke
is 79.0 mm, or 3.11 inches, forming a mildly undersquare layout
optimized for mid-range torque and balanced fuel consumption. The
compression ratio for most production years is around 9.2 to 1.
Power output for the D14A2 typically reaches approximately 90 horsepower
at about 6,300 rpm. Peak torque is around 120 to 125 Nm, or about 88 to
92 lb-ft, delivered near 4,600 to 4,800 rpm. Idle speed is generally
calibrated at 700 plus or minus 50 rpm. Engine redline is near 6,800
rpm, with fuel cut slightly above that point. The firing order is
1-3-4-2.
The cast-iron engine block ensures long-term durability and stable
thermal behavior. Cylinder walls are integral to the block, providing
reliable wear characteristics. The aluminum cylinder head features a
single overhead camshaft operating four valves per cylinder. The
camshaft actuates rocker arms that open and close intake and exhaust
valves. Valve lash adjustment uses screw-and-locknut fittings, allowing
precise clearance settings during maintenance.
The crankshaft is a forged-steel component supported by five main
bearings. Connecting rods are also forged steel, designed to sustain
continuous daily use. Pistons are cast aluminum alloy and include two
compression rings and one oil-control ring. Wrist pins are fully
floating for reduced friction. Combustion chambers are hemispherical,
promoting efficient flame travel and stable ignition across varied load
conditions.
Timing is provided by a toothed rubber timing belt that drives both the
camshaft and the water pump. Service intervals are commonly 90,000 to
100,000 km, or roughly 55,000 to 62,000 miles. Proper belt tension is
essential for camshaft timing accuracy.
The D14A2 uses Honda's PGM-FI multi-point electronic fuel injection
system. An electric in-tank pump delivers fuel through an inline fuel
filter to the fuel rail. The pressure regulator maintains fuel pressure
at approximately 36 to 42 psi, or about 250 to 290 kPa. Each cylinder is
fed by a solenoid-type injector controlled by the engine control unit.
Fuel metering is based on signals from the manifold absolute pressure
sensor, throttle position sensor, intake-air temperature sensor, coolant
temperature sensor, and oxygen sensor. The ECU also uses ignition
reference pulses from the distributor to synchronize injection timing.
These parameters allow precise fuel delivery across idle, cruise, and
acceleration conditions. Recommended fuel is unleaded gasoline with at
least 87 AKI rating, equal to about 91 RON.
Fuel filters require periodic replacement to prevent injector fouling.
Carbureted D-series engines preceded the D14 generation, but the D14A2
is exclusively electronically fuel injected.
The lubrication system is a full-pressure wet-sump design using a
crankshaft-driven trochoid oil pump. Engine oil is drawn through a
pickup screen, pressurized by the pump, then routed through a full-flow
spin-on oil filter. Pressurized oil is delivered to crankshaft main
bearings, connecting rod journals, camshaft journals, rocker arms, and
valvetrain components.
Total oil capacity with filter change is roughly 3.5 to 3.7 liters, or
about 3.7 to 3.9 US quarts. Recommended oil viscosity is SAE 5W-30 or
10W-30 depending on climate. At normal operating speed around 3,000 rpm,
oil pressure typically ranges from 50 to 70 psi, with idle pressure at
or above 10 psi. The PCV system channels blow-by gases into the intake
manifold to maintain internal crankcase pressure balance.
The cooling system consists of a belt-driven centrifugal water pump,
engine coolant passages, a cross-flow radiator, heater core, and
associated hoses. Coolant circulates through the engine block, cylinder
head, and radiator. The thermostat begins opening at approximately 82 C,
or 180 degrees F, and is fully open at around 95 C, or 203 degrees F.
Cooling system capacity is generally between 5.0 and 5.5 liters, or
about 5.3 to 5.8 US quarts. Radiator cap pressure ranges from 13 to 16
psi, equal to about 90 to 110 kPa. Honda specifies a 50/50 mixture of
ethylene glycol coolant and distilled water. Coolant replacement is
recommended every 40,000 km or two years.
| Intake and Exhaust Systems |
The induction system consists of an air-cleaner housing containing a
replaceable dry-element filter, intake resonator to reduce noise, and an
aluminum intake manifold designed for balanced airflow to each cylinder.
The throttle body is cable-actuated and houses the idle-air-control
valve along with the throttle position sensor.
The exhaust system includes a cast-steel exhaust manifold attached to a
catalytic converter positioned near the engine for quick warm-up and
emissions control. One or more oxygen sensors measure exhaust oxygen
content to maintain closed-loop fuel control. Downstream exhaust piping
includes a resonator and muffler tuned for low noise and minimal back
pressure. Emissions systems include EGR, evaporative emissions control,
and PCV.
| Ignition and Electrical System |
Ignition is handled by an electronic distributor containing a built-in
ignition coil, igniter module, and sensors that provide engine speed and
crank-angle reference signals to the ECU. The ECU calculates spark
advance using load, rpm, knock feedback, coolant temperature, and
intake-air temperature. The distributor directs high-voltage output to
each cylinder through insulated plug wires.
Spark plugs are typically NGK or Denso equivalents gapped to
approximately 1.0 millimeter, or 0.039 inch. Copper-core plugs generally
require replacement every 20,000 to 30,000 km, while platinum plugs may
last as long as 60,000 km. Consistent ignition performance is critical
for emissions compliance and fuel efficiency.
The D14A2 operates on a 12-volt electrical supply. The alternator
usually produces between 70 and 80 amperes. The starter motor uses a
reduction-gear mechanism for reliable cold-weather starting. Battery
capacity ranges between 40 and 60 amp-hours. Ground straps ensure clean
electrical continuity.
ECU inputs include MAP, TPS, IAT, ECT, and O2 sensors. Distributor
pickup coils send reference pulses used for fuel and spark timing.
Wiring harness insulation is designed to withstand thermal cycling and
vibration.
Engine dimensions include length between 580 and 620 mm, or 22.8 to 24.4
inches; width between 540 and 580 mm, or 21.3 to 22.8 inches; and height
between 630 and 690 mm, or 24.8 to 27.2 inches. Dry weight generally
falls between 110 and 125 kg, or 243 to 276 lbs, depending on
accessories, emissions equipment, and market variant.
Routine service intervals include oil and filter changes every 10,000
km, or 6,000 miles; air filter replacement every 20,000 km, or 12,000
miles; spark plug replacement every 20,000 to 30,000 km for copper plugs
or 60,000 km for platinum types; fuel filter replacement every 40,000
km, or 25,000 miles; valve clearance checks every 40,000 to 50,000 km;
timing belt replacement every 90,000 to 100,000 km; and coolant
replacement every 40,000 km or two years.
Healthy engine compression readings typically fall between 175 and 195
psi, or about 1,200 to 1,350 kPa, with no more than 10 percent variation
between cylinders.
Cylinder head bolts: 70 to 75 Nm, or 51 to 55 lb-ft.
Main bearing cap bolts: 50 to 60 Nm, or 38 to 43 lb-ft.
Connecting rod bolts: 35 to 40 Nm, or 28 to 33 lb-ft.
Camshaft bearing cap bolts: 11 to 13 Nm, or 9 to 10 lb-ft.
Flywheel bolts: 85 to 95 Nm, or 63 to 70 lb-ft.
Crankshaft pulley bolt: 130 to 140 Nm, or 96 to 103 lb-ft.
Intake manifold bolts: 20 to 22 Nm, or 16 to 18 lb-ft.
Exhaust manifold nuts: 28 to 30 Nm, or 21 to 24 lb-ft.
Spark plugs: 18 Nm, or 13 lb-ft.
Oil drain plug: 35 Nm, or 26 lb-ft.
The Honda D14A2 engine was offered primarily in European-market Honda
Civic models from the late 1990s. These variants were engineered for
strong fuel economy, low emissions, and practical everyday drivability.
The engine's combination of mechanical simplicity, dependable
construction, and low running cost make it suitable for long-term
ownership and economical operation.
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