Nissan VG33E Specifications
| Engine Model: Nissan VG33E |
| Engine Type: 4-cycle 6-cylinder SOHC 12-valve liquid-cooled gasoline |
| Total Displacement: 199.8 cu.in (3.27 L) |
| Rated Engine Power: 170-180 Hp (127-134 kW) at 4800 rpm |
| Fuel System Type: Multi-point electronic fuel injection |
____________________________________________________________________________________
The Nissan VG33E is a 3.3-liter, 60-degree V6 gasoline
engine introduced in 1996 as the displacement-upgraded successor to the
long-running VG30E. As part of Nissan’s VG engine family - the company’s first
mass-produced V6 design - the VG33E was engineered primarily for truck,
sport-utility, and minivan applications where low-end torque, durability, and
towing capacity took precedence over peak horsepower.
The displacement increase from 3.0 to 3.3 liters was achieved through a bore
enlargement from 87.0 mm to 91.5 mm while retaining the same 83.0 mm stroke,
resulting in improved low-speed torque delivery without significant changes to
the engine’s external dimensions. The VG33E retains the single overhead camshaft
(SOHC) valvetrain with two valves per cylinder - a configuration chosen for its
mechanical simplicity, reduced parts count, and reliability under sustained
load.
The engine became a cornerstone powertrain for Nissan’s light truck lineup
throughout the late 1990s and early 2000s, powering the Pathfinder, Frontier,
Xterra, and Quest, as well as the Infiniti QX4. Its robust cast-iron block,
belt-driven camshafts, and sequential multi-point fuel injection system
established a reputation for longevity that continues to make the VG33E a
popular choice for off-road enthusiasts and those seeking high-mileage
durability.
The VG33E is a 4-stroke, 60-degree V6, water-cooled gasoline engine utilizing a
single overhead camshaft (SOHC) valvetrain per cylinder bank with two valves per
cylinder, totaling 12 valves. Total displacement is 3.275 Liters (3,275 cc /
199.8 cu.in), derived from a bore of 91.5 mm (3.602 in) and a stroke of 83.0 mm
(3.268 in). The 60-degree bank angle provides inherent primary balance while
allowing compact packaging within engine bays. The compression ratio is set at
8.9:1, a conservative value selected to accommodate regular-grade fuel and to
ensure durability under high-load conditions.
Maximum power output ranges from 170 to 180 HP (127-134 kW) at 4,800 RPM, with
peak torque of 274 Nm (202 lb-ft) achieved at 2,800 RPM. The redline is
calibrated to 5,500 RPM. The firing order is 1-2-3-4-5-6, with cylinder banks
arranged as right bank cylinders 1, 3, 5 and left bank cylinders 2, 4, 6. The
engine management system is a Nissan-designed electronic control unit (ECU)
operating the sequential multi-point fuel injection system with feedback from
heated oxygen sensors.
The cylinder block is constructed from cast iron using
a 60-degree V6 configuration with a deep-skirt design that extends below the
crankshaft centerline. This material selection provides the rigidity required to
contain combustion pressures while maintaining dimensional stability across a
wide temperature range. The block features siamese bores with a finished bore
diameter of 91.5 mm (3.602 in).
The crankshaft is cast from nodular iron with induction-hardened journal
surfaces and is supported by four main bearings - a configuration sufficient for
the engine’s output and operating range. Connecting rods are forged steel with a
fractured-cap design ensuring precise bearing alignment and simplified assembly.
Pistons are cast aluminum with a slipper-skirt design and feature a slight dish
in the crown to achieve the 8.9:1 compression ratio. The cylinder block
incorporates cast-in oil passages for the hydraulic valve lifters and the
automatic timing belt tensioner. The engine mounts are positioned on the front
and sides of the block, providing stable support across the vehicle platforms.
Each cylinder head is manufactured from aluminum alloy,
a material selection that reduces overall engine weight and improves heat
dissipation from the combustion chambers. The SOHC valvetrain configuration
utilizes a single camshaft per bank operating two valves per cylinder through
hydraulic lash adjusters and rocker arms.
The camshafts are mounted in aluminum bearing caps with integral oil passages
for camshaft lubrication. Valve diameters measure 38.0 mm (1.496 in) for intake
and 32.0 mm (1.260 in) for exhaust. The hydraulic lash adjusters (HLA) are
self-adjusting, eliminating the need for manual valve clearance adjustments for
the engine’s service life. The combustion chambers are of the wedge type with a
quench area designed to promote turbulence and efficient combustion.
The intake valves are arranged on the inner side of each cylinder bank (the
V-valley), while the exhaust valves are located on the outer banks, creating a
reverse-flow configuration. The intake manifold is a two-piece aluminum casting
with long runners tuned to enhance low-end torque production, while the exhaust
manifolds are cast-iron log-type designs with provisions for oxygen sensors.
The fuel system is a sequential multi-point fuel
injection (SMPFI) system, with each cylinder receiving precisely timed fuel
delivery based on engine operating conditions. Fuel is supplied by an in-tank
electric pump operating at a regulated pressure of 2.5-3.0 bar (36-44 psi). The
fuel injectors are mounted in the intake manifold runners, positioned to direct
fuel toward the intake valves.
Each injector is actuated sequentially by the engine control unit based on
crankshaft position and camshaft position sensor inputs. The intake air system
incorporates a hot-wire mass airflow sensor (MAF) located upstream of the
throttle body, providing precise air mass measurement for fuel delivery
calculations. The throttle body is cable-actuated and houses a throttle position
sensor (TPS) and an idle air control (IAC) valve that manages cold start and
idle stabilization.
A fuel pressure regulator with a vacuum reference maintains consistent pressure
differential across the injectors. The engine control unit also manages ignition
timing, EGR operation, and evaporative emissions control. The fuel system is
calibrated for operation with regular unleaded gasoline of 87 octane (RON 91) or
higher.
The lubrication system is a full-flow, pressurized
design utilizing a gear-type oil pump mounted to the front of the crankshaft
within the timing belt cover. The oil pump draws oil from a baffled steel oil
pan through a screened pickup tube and delivers it through a full-flow spin-on
oil filter. Total oil capacity ranges from 4.0 to 4.5 Liters (4.2-4.8 qt)
depending on the filter size and the presence of the oil cooler.
A water-cooled oil cooler is integrated into the oil filter mounting assembly on
models equipped for towing or heavy-duty operation. The lubrication circuit
supplies oil to the crankshaft main bearings, connecting rod bearings, camshaft
bearings, hydraulic lash adjusters, and timing belt tensioner. Oil pressure at
operating temperature ranges from 2.0-4.0 bar (29-58 psi) across the normal
engine speed range, with a relief valve set to 4.5 bar (65 psi) to prevent
over-pressurization during cold starts. The recommended oil viscosity is 5W-30
or 10W-30 meeting API SG or higher specifications.
The cooling system is a water-cooled, pressurized
design utilizing a belt-driven centrifugal water pump mounted to the front of
the engine block. Coolant circulates through the cast-iron block and aluminum
cylinder heads, with a cross-flow aluminum radiator employed in all
applications. The thermostat is a wax-pellet unit with an opening temperature of
82°C (180°F), achieving full open at 95°C (203°F).
Total coolant capacity ranges from 7.5-8.5 Liters (7.9-9.0 qt) depending on
vehicle platform, heater core configuration, and the presence of a rear heater
in wagon applications. The cooling fan configuration varies by platform: viscous
clutch-driven fans are used in truck and SUV applications, while electric fans
are employed in front-wheel-drive minivan installations. The cooling system is
designed with adequate reserve capacity to accommodate the thermal loads
associated with towing and off-road operation.
Timing System: Each cylinder bank’s camshaft is driven
by a rubber timing belt from the crankshaft. The belt is a single-piece design
that routes around the crankshaft sprocket, tensioner pulley, and both camshaft
sprockets. An automatic hydraulic tensioner maintains correct belt tension
throughout the service interval. The timing belt is an interference design:
failure results in piston-to-valve contact causing catastrophic engine damage.
Replacement is required at specified intervals.
Ignition System: The ignition system is a distributor-less design with
individual ignition coils mounted directly above each spark plug (coil-on-plug)
or, in earlier variants, a waste-spark configuration with coil packs mounted to
the intake manifold. The engine control unit calculates ignition timing based on
inputs from the crankshaft position sensor, camshaft position sensors, mass
airflow sensor, and knock sensor. The knock sensor, mounted on the cylinder
block, allows the ECU to adjust timing to prevent detonation when lower-octane
fuel is used. Spark plugs are NGK BKR5E or equivalent, with a gap of 1.0-1.1 mm
(0.039-0.043 in).
Exhaust Gas Recirculation (EGR) System: An EGR system is employed to reduce
nitrogen oxide (NOx) emissions. The EGR valve is vacuum-actuated under
electronic control, routing a portion of exhaust gases from the exhaust manifold
to the intake plenum through a steel tube. The system is monitored by the engine
control unit through the EGR position sensor and oxygen sensor feedback.
Crankcase Ventilation: A closed positive crankcase ventilation (PCV) system
routes blow-by gases from the crankcase to the intake manifold through a PCV
valve. The system incorporates an oil separator within the valve cover to
prevent liquid oil from entering the intake tract.
Length measured from the front accessory drive face to
the transmission mounting flange is 620 mm (24.4 in). Width across the cylinder
heads, intake manifold, and exhaust manifolds measures 700 mm (27.6 in). Height
from the oil pan bottom surface to the top of the intake manifold is 680 mm
(26.8 in). The dry weight of the fully dressed engine - including the intake
manifold, exhaust manifolds, fuel system, ignition system, and accessory drives
- is 170 kg (375 lbs).
The timing belt is a high-priority service item with a
mandatory replacement interval of 100,000 km (60,000 miles) for most
applications. The water pump and timing belt tensioner should be replaced
concurrently as a preventative measure due to the interference design. Engine
oil and filter changes are recommended at 5,000-7,500 km (3,000-4,500 miles)
under normal driving conditions, with shorter intervals for severe-duty
operation such as towing or off-road use.
Valve clearance inspection is not required due to the hydraulic lash adjuster
system. Spark plug replacement is recommended at 60,000 km (37,000 miles) for
platinum-tipped plugs. The fuel filter is an in-line unit and should be replaced
at 40,000 km (25,000 mile) intervals. Coolant replacement is specified at 40,000
km (25,000 miles) or 24 months.
The EGR system and throttle body should be inspected for carbon accumulation at
60,000 km (37,000 mile) intervals. Compression pressure should be consistent
across all six cylinders, with a standard value of 1.2-1.4 MPa (174-203 psi) and
a minimum service limit of 1.0 MPa (145 psi) with maximum variation between
cylinders of 0.1 MPa (15 psi).
Cylinder Head Bolts (Cold), Step 1: 30 Nm (22 lb-ft).
Cylinder Head Bolts (Cold), Step 2: 60 Nm (44 lb-ft).
Main Bearing Cap Bolts: 70-80 Nm (52-59 lb-ft).
Connecting Rod Cap Bolts: 40-45 Nm (30-33 lb-ft).
Crankshaft Damper Pulley Bolt: 200-220 Nm (148-162 lb-ft).
Camshaft Sprocket Bolts: 80-90 Nm (59-66 lb-ft).
Camshaft Bearing Cap Bolts: 20-25 Nm (15-18 lb-ft).
Rocker Arm Shaft Bolts: 20-25 Nm (15-18 lb-ft).
Valve Cover Bolts: 8-10 Nm (71-89 lb-in).
Intake Manifold Bolts: 20-25 Nm (15-18 lb-ft).
Exhaust Manifold Nuts: 25-30 Nm (18-22 lb-ft).
Oil Pan Bolts: 10-12 Nm (7-9 lb-ft).
Water Pump Bolts: 20-25 Nm (15-18 lb-ft).
Flywheel / Drive Plate Bolts: 100-110 Nm (74-81 lb-ft).
Timing Belt Tensioner Bolt: 45-50 Nm (33-37 lb-ft).
Timing Belt Idler Pulley Bolt: 45-50 Nm (33-37 lb-ft).
Engine Mount Bracket Bolts: 55-65 Nm (41-48 lb-ft).
The Nissan VG33E engine served as a primary gasoline
powertrain across a range of Nissan light trucks, sport-utility vehicles, and
minivans throughout its production period from 1996 to 2004, with continued
production in certain markets beyond.
Nissan Pathfinder (R50): The VG33E powered the second-generation Pathfinder from
1996 through 2000, replacing the VG30E as the standard gasoline engine. The
engine was offered in both two-wheel-drive and four-wheel-drive configurations,
valued for its towing capacity and off-road durability.
Nissan Frontier / Navara (D22): The compact pickup platform received the VG33E
from 1999 to 2004, where it served as the premium engine option above the
four-cylinder KA24DE. The engine was particularly popular in North American
markets for its towing capability.
Nissan Xterra (WD22): The first-generation Xterra, introduced in 2000, utilized
the VG33E as its sole V6 engine option. The engine’s low-end torque
characteristics were well-suited to the Xterra’s off-road oriented design.
Nissan Quest / Mercury Villager (VX54): The minivan platform, produced in
collaboration with Ford, utilized the VG33E from 1999 to 2002. The engine was
mounted transversely and featured a modified intake system and front-wheel-drive
specific accessories.
Nissan Elgrand (E50): The Japanese Domestic Market luxury van received the VG33E
from 1997 to 2002, where it was offered alongside the VG30E and diesel
alternatives. The engine was configured with a rear-drive layout and heavy-duty
cooling system.
Nissan Paladin: The SUV platform, produced under the Zhengzhou Nissan joint
venture in China, utilized the VG33E from 2003 through 2013, representing one of
the longest production runs of the engine in any vehicle.
Infiniti QX4 (JR50): The luxury SUV variant of the Pathfinder received the VG33E
from 1997 to 2000, where it was paired with an automatic transmission and
full-time four-wheel-drive system.
____________________________________________________________________________________
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Industrial Engines Technical Specifications |
| Outboard Engines Technical Specifications |
