Acura Legend 3.5 Manual Diff Cooling

The Acura Legend 3.5 Manual Differential Cooling system is designed to maintain optimal temperature in the differential unit during high-performance driving conditions. This system features an integrated cooling mechanism, temperature monitoring, and enhanced lubrication flow to prevent overheating and ensure longevity of the differential components. Below are key sections covering system overview, installation, operation, maintenance, and troubleshooting.

System Overview

Key components: Differential cooling radiator, temperature sensor, coolant pump, fluid lines, mounting brackets, and control module.

Installation Procedure

Professional installation recommended. Ensure vehicle is on level surface with parking brake engaged.

1. Drain differential fluid: Remove drain plug, collect fluid in approved container.
2. Mount cooling radiator: Install using provided brackets in suitable location.
3. Install temperature sensor: Replace differential drain plug with sensor unit.
4. Connect fluid lines: Route hoses from differential to radiator and pump.
5. Mount coolant pump: Secure pump in accessible location near differential.
6. Connect electrical: Wire pump, fan, and control module to power source.
7. Fill system: Add recommended cooling fluid to reservoir.
8. Test system: Start vehicle, check for leaks and proper operation.

WARNING! Use proper lifting equipment; differential components are heavy. Ensure all connections are secure before operation.

Operation Guidelines

System activates automatically when differential temperature exceeds 180°F (82°C).

1. Normal operation: Monitor temperature gauge during driving.
2. High-performance use: System maintains temperature below 220°F (104°C).
3. Manual override: Use control module to activate cooling system manually.
4. Temperature settings: Adjust activation threshold via control module (180-200°F range).

CAUTION! Do not operate system with fluid leaks. Monitor temperature regularly during track use.

Technical Specifications

• Cooling Capacity: Reduces differential temperature by 40-60°F
• Operating Temperature: 180-220°F activation range
• Fluid Type: Synthetic differential cooling fluid
• Pump Flow Rate: 2.5 gallons per minute
• Radiator Size: 12" x 8" x 2" aluminum core
• Power Requirements: 12V DC, 15 amp fuse
• Weight: Complete system adds 8.5 lbs
• Fluid Capacity: 1.5 quarts total system volume
• Temperature Sensor: 100-300°F range with 2°F accuracy

Controls and Monitoring

Dashboard temperature gauge displays real-time differential temperature. Control module allows manual operation and setting adjustments.

Control Module Features: Power switch, manual override, temperature display, setting adjustment, system status indicators.

Monitoring: Temperature gauge (green: normal, yellow: warming, red: overheating). Automatic shutdown at 240°F (116°C) for protection.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

1. Monthly: Check fluid level in reservoir, inspect for leaks.
2. Every 6 months: Inspect hoses and connections for wear.
3. Annually: Replace cooling fluid, clean radiator fins.
4. Every 2 years: Replace pump seals, check electrical connections.

Tip: Use only recommended synthetic cooling fluid for best performance.

Cooling System Components

Detailed description of major system components and their functions.

1. Cooling Radiator: Aluminum core with copper fins, maximizes heat transfer.
2. Electric Pump: Brushless DC motor, corrosion-resistant housing.
3. Temperature Sensor: PT100 RTD sensor, stainless steel housing.
4. Control Module: Microprocessor-based, waterproof enclosure.
5. Cooling Fan: 120mm diameter, thermostatically controlled.
6. Fluid Reservoir: Polypropylene construction with level indicator.
7. Mounting Hardware: 304 stainless steel brackets and fasteners.

WARNING! Use genuine replacement parts only. Aftermarket components may affect performance.

Performance Benefits

Enhanced differential cooling provides significant performance advantages.

• Extended differential life under high-load conditions
• Consistent performance during track sessions
• Reduced fluid breakdown and component wear
• Improved reliability for competitive driving
• Maintains optimal viscosity for better lubrication

Care & Maintenance

Regular inspection and proper fluid maintenance are essential.

Cleaning: Use compressed air to clean radiator fins. Wipe components with dry cloth.

CAUTION! Do not use high-pressure water on electrical components. Avoid petroleum-based cleaners.

Regulatory Compliance

System complies with SAE J standards for automotive cooling systems. Materials meet RoHS requirements. Installation must comply with local vehicle modification regulations. For technical support, contact Acura Performance Parts at 1-800-ACURA-11 or visit www.acuraperformanceparts.com.

Troubleshooting

Reset: Disconnect battery for 30 seconds to reset control module.

Service: 1-800-ACURA-11; www.acuraperformanceparts.com