Oil Cooler Return Line for Power Steering. Porsche 924S / 944  ❭  94434745902

Porsche 924S / 944 - Power Steering Oil Cooler Return Line

Maintain Proper Steering Fluid Circulation and Cooling

The power steering oil cooler return line for the Porsche 924S and 944 is an essential hydraulic hose within the power assisted steering system. This return line carries cooled steering fluid from the oil cooler back to the reservoir, ensuring continuous circulation and stable operating temperatures.

Fits:

• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988

Maintaining correct fluid return flow is critical to protect the steering pump, maintain steering assist and preserve overall hydraulic system performance.

What the Power Steering Oil Cooler Return Line Does

In the Porsche 924S and 944, the power steering system uses hydraulic pressure to reduce steering effort. As the steering fluid circulates, it generates heat, particularly during spirited driving or extended use.

The oil cooler helps regulate fluid temperature, and the return line:

• Transfers cooled hydraulic fluid back to the reservoir
• Maintains steady fluid circulation
• Supports consistent steering assistance
• Reduces heat-related wear on steering components
• Helps prevent pump strain and noise

Without a properly functioning return line, the system can lose fluid or experience overheating, affecting steering reliability.

Why Oil Cooler Return Lines Fail

Over time, the oil cooler return hose can deteriorate due to:

• Heat exposure from the engine bay
• Continuous contact with hydraulic fluid
• Rubber hardening and cracking
• Age-related material fatigue
• Vibration and movement during driving
• Corrosion at metal connections

Because Porsche 924S and 944 models are now classic vehicles, original hoses are often decades old and at risk of sudden failure.

Common signs of failure include:

• Power steering fluid leaks under the front of the car
• Damp or oily residue near hose fittings
• Low power steering fluid levels
• Whining noise from the steering pump
• Increased steering effort

When You Should Replace the Return Line

You should replace the power steering oil cooler return line if:

• Visible cracks or brittleness are present
• There are signs of fluid seepage
• Steering feels heavier than normal
• he steering pump becomes noisy
• You are servicing the steering rack or pump
• The vehicle is undergoing restoration or preventative maintenance

Proactive replacement reduces the risk of fluid loss and protects expensive steering components from damage.

At Design911, we supply high-quality power steering hoses manufactured to meet OEM standards. This oil cooler return line is designed for correct fitment and reliable performance under daily driving and performance conditions.

Replacing aged steering hoses improves system reliability, reduces the risk of leaks and maintains precise steering control.

Key Benefits at a Glance

• Direct fit for Porsche 924S and 944
• Returns cooled steering fluid to reservoir
• Maintains stable hydraulic circulation
• Reduces risk of leaks and overheating
• Ideal for maintenance or restoration
• Helps preserve steering pump and rack longevity