Radiator coolant top hose. Porsche 928 85-95  ›  92810623808

Radiator Coolant Top Hose 

The OE Match Radiator Coolant Top Hose is a replacement upper radiator hose for Porsche 928 models manufactured between 1985 and 1995.

Fits:

• Porsche 928S2 4.7L 1984-86
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Diagram ref no 19

Designed to maintain coolant circulation between the engine and radiator, this hose helps regulate engine temperature and prevent overheating.

Over time, original coolant hoses can become brittle, swollen or cracked due to constant exposure to heat, pressure and coolant.

Replacing a deteriorated hose helps maintain cooling system reliability and reduces the risk of coolant leaks or engine overheating.

What Does It Do?

The upper radiator hose carries hot coolant from the engine towards the radiator, where heat is removed before the coolant circulates back through the cooling system.

It plays an essential role in maintaining the correct engine operating temperature.

Why Does It Fail?

Common causes of failure include:

• Age-related rubber deterioration
• Cracking caused by repeated heat cycles
• Swelling or softening from coolant contamination
• Excessive cooling system pressure
• Damage around hose connections
• General wear after prolonged use

When Should It Be Replaced?

Replace the hose if you notice:

• Visible cracks or splits
• Coolant leaks around the hose or connections
• Swollen, soft or hardened rubber
• Coolant loss or overheating
• Damage discovered during cooling system maintenance

Inspect the hose regularly, particularly on older Porsche 928 models.

Installation Notes

Allow the engine to cool completely before removing the original hose. Inspect the hose connections and clips, replacing damaged clamps where necessary.

Refill the cooling system with the correct coolant mixture, bleed according to Porsche workshop instructions and check for leaks.

Porsche 928 Radiator Hoses & Cooling System Parts

The Porsche 928 cooling system relies on correctly functioning radiator hoses to circulate coolant and maintain stable engine temperatures.

OE Match radiator coolant top hose 92810623808 provides a replacement for compatible Porsche 928 models from 1985 to 1995, helping prevent coolant leaks and maintain reliable engine cooling.

Design911 supplies Porsche 928 radiator hoses, coolant pipes, thermostats, water pumps and associated cooling system components.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

92810623808

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