Full Aluminum Performance Radiator for 2003–2007 Infiniti G35 3.5L V6 – Automatic & Manual Transmission

Benefits of Aluminum Radiator Construction

Heat Transfer: Aluminum provides effective thermal conductivity for radiator cooling applications.

Durability: Welded aluminum construction can eliminate certain failure points associated with aging plastic end tanks.

Performance Applications: Aluminum radiators are commonly used in modified street cars and motorsports builds.

Corrosion Resistance: Proper coolant chemistry helps protect aluminum cooling components.

Custom Engine Bay Appearance: An aluminum radiator can complement other performance-oriented engine bay upgrades.

Actual durability depends on material quality, weld integrity, cooling system maintenance, and installation.

TIG-Welded Radiator Construction

The radiator is advertised as featuring TIG-welded aluminum construction.

TIG welding is commonly used in performance radiator manufacturing because it provides precise control over welded joints.

Why TIG Welding Matters

A properly manufactured TIG-welded radiator can provide:

• Durable metal-to-metal connections.
• Consistent sealing between components.
• Construction suitable for performance applications.
• An alternative to crimped plastic end-tank designs.

Weld quality remains important.

Inspect the radiator for shipping damage and visible defects before installation.

Integrated Automatic Transmission Cooler

The radiator includes an integrated transmission cooler for compatible automatic transmission applications.

Automatic transmissions generate heat during normal operation.

That heat can increase during traffic, spirited driving, and sustained operation under load.

The integrated cooler helps transfer heat between transmission fluid and the engine cooling system.

Transmission Cooler Specifications

The supplied manufacturer information lists:

Transmission Cooler: Integrated
Cooler Dimensions: Approximately 26 × 255 mm
Connection Thread: M14 × 1.5

The 26 × 255 mm measurement appears to describe the integrated cooler assembly rather than the radiator core.

Why Transmission Cooling Matters

Temperature Management: Helps regulate automatic transmission fluid temperatures.

Factory-Style Integration: Supports compatible vehicles originally equipped with radiator-based transmission cooling.

Convenient Installation: May allow connection of the original automatic transmission cooler lines when fittings match.

Performance Reliability: Proper transmission fluid temperature management supports long-term transmission operation.

Manual Transmission Applications

Manual transmission G35 models generally do not require radiator-integrated automatic transmission cooling.

For compatible manual transmission installations, the integrated cooler may remain unused.

However, the correct treatment of unused cooler ports should be confirmed with the radiator manufacturer.

Never assume unused ports can be modified, plugged, or removed without guidance.

Full Aluminum Infiniti G35 Radiator Technical Specifications

Fitment note: Overall radiator dimensions do not establish the exact core dimensions or mounting configuration. Compare the radiator with the original assembly before ordering.

2003–2007 Infiniti G35 Radiator Fitment

The radiator is advertised for 2003–2007 Infiniti G35 vehicles equipped with the 3.5L V6 engine.

However, the G35 platform includes several body styles, drivetrain configurations, and engine revisions.

Infiniti G35 Sedan

The G35 sedan became popular for its combination of rear-wheel-drive performance, practicality, and Nissan VQ-series power.

Radiator compatibility may vary depending on:

• Model year.
• Automatic or manual transmission.
• Engine configuration.
• Cooling fan arrangement.
• Factory radiator dimensions.
• Radiator mounting locations.

Infiniti G35 Coupe

The G35 coupe remains a favorite among Japanese performance enthusiasts.

Its VQ35 engine and rear-wheel-drive layout make it popular for modified street cars, drift builds, and track projects.

However, coupe and sedan radiator configurations should not be assumed identical.

Verify the original radiator part number and mounting arrangement before purchasing.

Important 2007 G35 Fitment Considerations

The 2007 G35 sedan introduced the VQ35HR engine, while the 2007 G35 coupe retained the earlier VQ35DE-family configuration.

These engine and platform differences can affect cooling system compatibility.

Important: A radiator advertised for all 2003–2007 G35 models should not automatically be considered compatible with every 2007 sedan and coupe.

Verify the engine code, body style, transmission, and original radiator specifications.

Cooling System Performance for the Nissan VQ35 Engine

The VQ35 engine is widely used in Nissan and Infiniti performance applications.

It delivers strong naturally aspirated performance and responds well to many common modifications.

However, performance driving can place additional demands on the cooling system.

Spirited Street Driving

Repeated acceleration and higher engine loads increase heat generation.

A properly functioning radiator helps dissipate engine heat during normal and demanding operation.

Stop-and-Go Traffic

During traffic and low-speed operation, radiator airflow depends heavily on the electric cooling fans.

A properly functioning radiator and fan assembly helps maintain stable coolant temperatures.

Hot Weather Driving

Higher ambient temperatures reduce the temperature difference between the radiator and surrounding air.

This makes cooling system condition and airflow especially important.

Modified G35 Builds

Performance modifications can increase heat output.

A properly sized radiator helps dissipate this heat while maintaining adequate coolant circulation.

An upgraded radiator can support cooling system reliability, but it cannot compensate for a malfunctioning thermostat, weak water pump, or improperly functioning cooling fan.

How to Install an Aluminum Radiator on an Infiniti G35

Replacing the radiator on an Infiniti G35 can be a manageable project for experienced DIY mechanics.

However, installation procedures vary by model year, body style, engine configuration, and transmission.

Step 1: Allow the Engine to Cool

Park the vehicle on a level surface and allow the engine to cool completely.

Never remove a radiator cap or pressurized coolant reservoir cap while the cooling system is hot.

Step 2: Drain the Cooling System

Position a suitable drain pan beneath the radiator.

Drain the coolant according to the factory service procedure.

Inspect the coolant for corrosion, contamination, or debris.

Step 3: Remove the Original Radiator

Disconnect the upper and lower radiator hoses.

Remove the cooling fan assembly and any components obstructing radiator removal.

For automatic transmission vehicles, disconnect the transmission cooler lines using the appropriate procedure.

Remove the radiator mounting hardware.

Carefully lift the original radiator from the engine compartment.

Step 4: Compare the Replacement Radiator

Before installation, compare the aluminum radiator with the original.

Verify:

• Overall radiator dimensions.
• Mounting bracket locations.
• Upper and lower hose connections.
• Cooling fan mounting points.
• Transmission cooler fittings.
• Radiator cap or pressure-control configuration.
• Clearance around engine accessories.

Do not force the radiator into position if the mounting points or hose connections do not match.

Step 5: Install the Aluminum Radiator

Position the replacement radiator into the factory mounting area.

Confirm that the radiator sits securely and that the mounting points align correctly.

Install the appropriate mounting hardware.

Step 6: Reconnect Transmission Cooler Lines

For compatible automatic transmission applications, reconnect the transmission cooler lines using the correct fittings and procedures.

Inspect the lines for corrosion, damage, or leaks.

Do not overtighten fittings or use incompatible adapters.

For manual transmission applications, follow the radiator manufacturer’s instructions regarding unused cooler connections.

Step 7: Reconnect Radiator Hoses

Reconnect the upper and lower radiator hoses using suitable clamps.

Inspect the hoses for cracking, swelling, or deterioration.

Replace damaged hoses before refilling the cooling system.

Step 8: Refill and Bleed the Cooling System

Refill the system using coolant appropriate for the engine and model year.

Follow the factory coolant filling and air-removal procedure.

The VQ35 cooling system can be sensitive to trapped air, making proper bleeding especially important.

Step 9: Verify Cooling System Operation

Start the engine and monitor coolant temperature.

Confirm that the thermostat opens and the electric cooling fans operate correctly.

Inspect all radiator hose connections and transmission cooler fittings for leaks.

After the engine cools, recheck coolant level and mounting hardware.

For automatic transmission vehicles, check transmission fluid level according to the applicable service procedure.

Common Infiniti G35 Cooling System Problems

A radiator replacement may be necessary when the original cooling system develops leaks, restrictions, or physical damage.

Cracked Radiator End Tanks

Repeated heating and cooling cycles can weaken aging radiator components.

Restricted Cooling Passages

Corrosion, contamination, and deposits can reduce coolant flow.

Leaking Radiator Seals

Aging seals can allow coolant to escape from the radiator assembly.

Damaged Cooling Fins

Bent or clogged fins can restrict airflow and reduce heat transfer.

Cooling Fan Problems

A malfunctioning electric fan, relay, or control system can reduce airflow through the radiator.

Thermostat Failure

A faulty thermostat can restrict coolant circulation and contribute to overheating.

Water Pump Problems

A failing water pump can cause coolant leakage or reduced circulation.

Trapped Air in the Cooling System

Improper coolant bleeding can create air pockets and cause overheating.

Transmission Cooler Leaks

On automatic transmission vehicles, a damaged integrated cooler can allow fluid leakage or cross-contamination.

Before replacing components, inspect the complete cooling system and identify the underlying cause.

Complete Your Infiniti G35 Cooling System Upgrade

When replacing the radiator, consider inspecting related components.

Radiator Hoses: Replace hoses showing cracks, swelling, or deterioration.

Thermostat: Verify correct operation and replace it when necessary.

Water Pump: Inspect for coolant leaks, bearing noise, and other signs of failure.

Electric Cooling Fans: Confirm proper operation and adequate airflow through the radiator.

Radiator Cap: Verify the correct pressure rating for the cooling system.

Coolant: Use a coolant formulation appropriate for the engine and model year.

Transmission Cooler Lines: Inspect for leaks, corrosion, and damaged fittings.

Cooling System Bleeding Components: Inspect air bleeders and related fittings where applicable.

Explore additional Infiniti G35, Nissan 350Z, VQ35 engine, and performance cooling components at Pro Street Online.

Is This Aluminum Radiator Worth It for Your Infiniti G35?

For G35 owners seeking a durable replacement radiator, this full aluminum unit offers several practical advantages.

Its TIG-welded construction, integrated transmission cooler, and performance-oriented design make it an appealing alternative to aging factory radiator assemblies.

This radiator may be particularly useful for owners who:

• Need to replace a leaking factory radiator.
• Drive a compatible 2003–2007 Infiniti G35.
• Want all-aluminum radiator construction.
• Are maintaining a high-mileage VQ35 engine.
• Are upgrading a modified street or track car.
• Need integrated automatic transmission cooling.
• Prefer welded aluminum construction over plastic end tanks.
• Are restoring or maintaining a G35 coupe or sedan.

Proper fitment remains the most important consideration.

Confirm the vehicle’s engine configuration, body style, transmission, original radiator dimensions, and mounting arrangement before purchasing.

Upgrade Your Infiniti G35 Cooling System at Pro Street Online

Whether you’re maintaining a daily-driven G35 sedan, restoring a high-mileage coupe, or building a modified VQ35-powered performance car, dependable engine cooling is essential.

The Full Aluminum Performance Radiator for 2003–2007 Infiniti G35 3.5L V6 combines TIG-welded aluminum construction, an integrated automatic transmission cooler, and large cooling dimensions in a performance-oriented replacement package.

Advertised for compatible automatic and manual transmission applications, this radiator offers an upgrade path for owners seeking improved cooling system durability and reliable heat dissipation.

Shop Infiniti G35 performance radiators, Nissan VQ35 cooling upgrades, aluminum radiators, and engine cooling components at www.ProStreetOnline.com.