Honda J35Z1 Specifications
| Engine Model: Honda J35Z1 |
| Engine Type: 4-cycle 6-cylinder SOHC 24-valve i-VTEC liquid-cooled gasoline |
| Total Displacement: 212 cu.in (3.47 L) |
| Rated Engine Power: 244-250 Hp (182-186 kW) at 6000 rpm |
| Fuel System Type: Multi-point programmed fuel injection (PGM-FI) |
____________________________________________________________________________________
The Honda J35Z1 is a 3.5-liter V6 gasoline
engine belonging to the late second-generation J-series lineup. Produced
for several Honda and Acura models in the late 2000s, the J35Z1 was
engineered for smooth torque delivery, refined NVH characteristics,
excellent efficiency, and long-term durability.
It serves as one of the foundational powerplants in Honda’s mid-sized V6
product segment, offering a well-balanced combination of power,
responsiveness, fuel economy, and reliability. The engine was fitted to
popular models such as the Honda Pilot, Honda Accord V6, and Acura-Honda
regional variants depending on market.
The J35Z1 integrates Honda’s i-VTEC system on the intake camshaft,
electronically controlled throttle, and a lightweight aluminum block
with cast-iron cylinder liners. While not intended as a
performance-oriented V6 like the J32A2 or J37A4, the J35Z1 offers a
highly usable powerband with strong low- and mid-range acceleration
suitable for family vehicles and crossovers.
It is a proven engine capable of achieving very high mileage with
routine maintenance. Owners consistently note its smooth operation,
quiet idle, dependable fuel system, and minimal long-term mechanical
issues.
The Honda J35Z1 is a four-stroke, water-cooled, 60-degree V6 engine with
a total displacement of 3,471 cc (212.0 cubic inches). Bore is 89.0 mm
(3.50 inches), and stroke is 93.0 mm (3.66 inches), giving the engine a
long-stroke configuration optimized for torque. The compression ratio is
10.0:1 depending on market calibration.
Factory-rated output:
- Power: 244-250 Hp (182-186 kW) at around 5,700-6,000 rpm
- Torque: 327-340 Nm (241-251 lb-ft) at around 4,500 rpm
- Idle speed: 680 ± 50 rpm
- Rev limiter: 6,500-6,700 rpm
The firing order is 1-4-2-5-3-6, a standard arrangement for Honda’s
60-degree V6 designs. The J35Z1 employs a forged steel crankshaft
supported by four main bearings, forged connecting rods, and lightweight
aluminum pistons with friction-reducing skirt coatings. The engine uses
multi-point programmed fuel injection (PGM-FI), coil-on-plug ignition,
and modern emissions and airflow management systems.
The cylinder block is constructed from high-strength aluminum alloy and
features an open-deck design. Cast-iron liners are centrifugally bonded
into the bores, providing long-term wear resistance. Aluminum alloy
reduces overall weight while helping dissipate heat quickly, improving
efficiency and preventing thermal hotspots.
A deep-skirt block structure improves rigidity and suppresses vibration.
The forged steel crankshaft rotates within four main bearings that are
secured by a heavy-duty main bearing girdle. This girdle ties all
bearing caps into a single structural component, improving torsional
stability and maintaining bearing alignment under high load. The oil
galleries are cast and machined into the block to ensure uniform
lubrication to journals, rods, and valvetrain components.
The J35Z1 uses aluminum cylinder heads with a SOHC (Single Overhead
Camshaft) layout and four valves per cylinder. Honda’s i-VTEC system is
applied to the intake camshaft, enabling both variable lift and variable
cam phasing. This improves torque delivery at lower rpm and optimizes
breathing efficiency at higher rpm, reducing pumping losses and
enhancing combustion efficiency.
Valve sizes:
- Intake valves: approx. 35 mm (1.38 inches)
- Exhaust valves: approx. 30 mm (1.18 inches)
The head's compact pent-roof combustion chambers promote swirl,
improving fuel-air mixing and reducing emissions. Roller rocker arms
reduce valvetrain friction, increasing efficiency and longevity.
Hydraulic lash adjusters eliminate the need for periodic valve clearance
adjustment. The timing belt drives the camshafts and operates smoothly
under normal driving conditions.
The J35Z1 fuel system is based on Honda’s PGM-FI design, using
sequential multi-point fuel injection and a returnless fuel rail. Fuel
pressure remains stable at approximately 350-400 kPa (51-58 psi) with an
in-tank regulator. High-precision injectors deliver atomized fuel
directly into the intake ports.
Sensors incorporated in the system:
- MAP sensor
- IAT sensor
- ECT sensor
- TPS (electronic throttle input)
- Wideband upstream oxygen sensor
- Downstream O2 sensor
- Knock sensor
- Crankshaft (CKP) and Camshaft (CMP) sensors
Fuel is controlled via an advanced ECU that modulates pulse width,
ignition timing, and VTEC activation. Recommended fuel is regular
unleaded gasoline (87 AKI / 91 RON), though higher octane improves knock
resistance when towing or under heavy load.
The J35Z1 employs a full-pressure wet-sump lubrication system with a
crankshaft-driven trochoid oil pump. The pump delivers consistent oil
pressure across the rpm range.
Lubrication specifications:
- Oil capacity (with filter): 4.5 liters (4.8 US quarts)
- Oil pressure at 3,000 rpm: approx. 350-500 kPa (51-72 psi)
- Idle oil pressure: approx. 70-120 kPa (10-17 psi)
Piston cooling jets spray oil beneath the piston crowns, reducing
temperature and preventing knock. The engine uses a full-flow spin-on
oil filter. Recommended viscosities are SAE 5W-20 or 0W-20 depending on
climate. Oil and filter changes are recommended every 10,000 km (6,000
miles) under normal service.
The cooling system is a liquid-circulating, closed-loop system. A
belt-driven centrifugal water pump circulates coolant through the
aluminum block, cylinder heads, heater core, and radiator.
Cooling specifications:
- Coolant capacity: 7.0-7.5 liters (7.4-7.9 US quarts)
- Thermostat opening: approx. 78-82°C (172-180°F)
- Fully open temperature: approx. 95°C (203°F)
- System pressure: approx. 90-110 kPa (13-16 psi)
A cross-flow aluminum radiator and electric cooling fan ensure efficient
temperature regulation. Honda recommends coolant replacement every
40,000 km (25,000 miles) or two years to maintain corrosion protection
and thermal stability.
| Intake and Exhaust Systems |
The induction system uses a tuned composite intake manifold designed for
mid-range torque. The air intake uses a dry-element filter housed in a
resonator-equipped airbox to minimize intake noise. The throttle body is
electronically controlled (drive-by-wire), allowing precise modulation.
The exhaust system includes:
- Stainless or cast exhaust manifolds
- Close-coupled catalytic converter
- Secondary downstream catalytic converter (vehicle dependent)
- Upstream and downstream oxygen sensors
The exhaust flow is tuned to balance emissions, torque, and noise
characteristics.
| Ignition and Electrical System |
Ignition is provided through a coil-on-plug setup controlled by the ECM.
Iridium spark plugs help maintain strong spark and long service life.
Electrical specifications:
- Spark plug gap: approx. 1.0-1.1 mm (0.039-0.043 inches)
- Alternator output: approx. 110-130 amperes
- Starter motor: approx. 1.6-2.0 kW
- System voltage: 12 V
The ECU handles ignition timing, VTEC engagement, knock response,
throttle control, idle speed, and emissions regulation. OBD-II
diagnostics are included.
The J35Z1 features:
- PCV system
- EVAP emissions system
- EGR valve for NOx control
- OBD-II monitoring
- Electronic idle control
- Optional VCM (market dependent)
- Length: 680 mm (26.8 inches)
- Width: 690 mm (27.2 inches)
- Height: 720 mm (28.3 inches)
Dry weight ranges from 165 to 180 kg (364-397 lb), depending on
accessory configuration.
Recommended service intervals:
- Engine oil and filter: every 10,000 km (6,000 miles)
- Air filter: every 20,000-30,000 km
- Spark plugs: every 100,000 km (62,000 miles)
- Coolant: every 40,000 km or 2 years
- Drive belt: inspect every 30,000 km
- Valve clearance: inspect every 120,000 km
- Compression test: 180-210 psi (1,240-1,450 kPa)
- Cylinder head bolts: 30 Nm (22 lb-ft) + 90° + 90°
- Main bearing caps: 60 Nm (44 lb-ft)
- Connecting rod bolts: 40 Nm (30 lb-ft) + 90°
- Flywheel bolts: 88 Nm (65 lb-ft)
- Crankshaft pulley bolt: 235-245 Nm (173-181 lb-ft)
- Intake manifold bolts: 22 Nm (16 lb-ft)
- Exhaust manifold nuts: 30 Nm (22 lb-ft)
- Spark plugs: 18 Nm (13 lb-ft)
- Oil drain plug: 40 Nm (30 lb-ft)
The Honda J35Z1 engine was used in:
- Honda Pilot (2006-2008)
- Honda Accord V6 (regional trims)
- Acura models depending on market
- Aftermarket swaps for lightweight Honda projects
____________________________________________________________________________________
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Industrial Engines Technical Specifications |
| Outboard Engines Technical Specifications |
