Sunsong 3402177 Power Steering Pressure Line Hose Assembly - Hydroboost To Gear

Power Steering Pressure Line Hose for Hydroboost Applications

Sunsong 3402177 is a power steering pressure line hose assembly built for hydroboost-to-gear steering systems. It is engineered for direct replacement use on select Buick, Cadillac, and Oldsmobile applications, including Riviera, Eldorado, Seville, and Toronado models.

With OE-style end fittings and corrosion-resistant tubing, this hose is made for accurate routing and dependable pressure transfer in demanding steering systems.

Key Features

• Max working pressure of 1,500 psi
• Burst pressure rating of 8,700 psi
• Tensile strength of 1,600 lb
• 16 mm male O-ring end 1 fitting
• 18 mm male O-ring end 2 fitting
• 45.5 in. overall length
• CSM hose material for pressure-line service
• High-grade steel tubing with zinc electroplating for corrosion resistance
• Precision-engineered replacement for hydroboost-to-gear steering layouts

Detailed Description

Sunsong 3402177 power steering pressure line hose assembly is built to restore pressure delivery between the hydroboost unit and steering gear on select GM vehicles. It is a direct-fit replacement for 1981-1985 Buick Riviera, 1980-1985 Cadillac Eldorado, 1980-1985 Cadillac Seville, and 1982-1985 Oldsmobile Toronado applications with hydroboost to gear routing. This part number, 3402177, is also referenced in aftermarket interchange listings for the same application.

The hose uses male O-ring fittings at both ends, with 16 mm and 18 mm connection sizes, and a 45.5-inch length to match the specified routing. Sunsong manufactures the tubing from high-grade steel with a zinc coating to improve resistance to rust, road salt, moisture, and grime. The assembly is engineered to restore wearable components to original condition where applicable and to maintain proper steering system pressure under load.

Common Problems This Hose Can Address

• Power steering fluid leaks at the pressure line
• Cracked or deteriorated hose material from age and heat exposure
• Corrosion on steel tubing from road salt and moisture
• Incorrect hose routing or fitment on hydroboost-to-gear systems
• Loss of steering assist caused by pressure-line failure

Installation Notes and Tips

Verify the vehicle uses hydroboost-to-gear steering routing before ordering. Confirm both fitting sizes and end types match the original hose: 16 mm male O-ring on one end and 18 mm male O-ring on the other. Inspect adjacent seals, brackets, and mounting points for wear or damage before installation so the new hose can seat correctly and maintain proper line alignment.

For 1981-1985 Buick Riviera, 1980-1985 Cadillac Eldorado, 1980-1985 Cadillac Seville, and 1982-1985 Oldsmobile Toronado models, match the original routing and connection points carefully to avoid stress on the line.

Quality Assurance

Each Sunsong 3402177 hose is pressure-tested before leaving the factory to confirm proper operation and installation readiness. The assembly is built to exceed original equipment performance standards for pressure, burst strength, and durability.