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Expansion Tank Hoses
By OE Match
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
This OE Match expansion tank pipe is a direct replacement for the original Porsche coolant hose fitted to Porsche 928 models from 1978 to 1995. Manufactured to OE specifications, it is engineered to provide reliable coolant transfer between the coolant expansion tank and engine cooling pipe assembly while maintaining factory-correct fitment and cooling system performance.
Fits:
Porsche 928 1978 - 1991
Porsche 928 1993 - 1995
Diagram ref no 33
Installed within the engine cooling system, this hose connects the upper expansion/header tank to the metal coolant pipe or engine “Y” pipe assembly. It plays an important role in circulating coolant and allowing coolant expansion and pressure equalisation within the cooling circuit. Proper coolant flow through this hose is essential for maintaining stable engine operating temperatures and preventing overheating.
The expansion tank pipe transfers coolant between the expansion tank and cooling system pipework, helping maintain correct coolant circulation, pressure regulation, and cooling system efficiency.
Function
• Connects coolant expansion tank to engine cooling pipework
• Supports coolant circulation and pressure equalisation
• Helps maintain stable engine operating temperature
• Reduces risk of coolant leaks and overheating
• Maintains efficient cooling system operation
Cooling hoses are constantly exposed to heat, coolant pressure, and engine vibration. Over time, the hose material can become brittle or porous, increasing the risk of coolant leaks and cooling system failure. Replacing worn coolant hoses helps maintain reliable engine cooling performance and reduces the risk of overheating damage.
When to replace
• Visible coolant leaks or staining
• Cracked, hardened, or swollen hose material
• Cooling system pressure loss
• Overheating or fluctuating coolant temperatures
• During preventative cooling system maintenance
• During radiator or engine cooling system repairs
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810632301
The product you are viewing cross references to these numbers
OEMatch Expansion Tank Hoses — Durability, Sealing, Performance
OEMatch Expansion Tank Hoses for Porsche models form part of the vehicle's cooling system, linking the coolant reservoir to the engine and radiator. Proper hose condition supports stable pressure and coolant recovery during temperature changes and reduces the risk of leaks or overheating.
Available Types
- Moulded hose assemblies designed for specific mounting routes
- Reinforced rubber hoses with beaded ends for clamp connections
- Silicone high-temperature hoses used in some applications
Understanding OEMatch Expansion Tank Hoses
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original expansion tank hoses. OE (Original Equipment) refers to parts matching original specifications for the expansion tank hoses and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM expansion tank hoses engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Expansion tank hoses transfer coolant between the reservoir and the cooling circuit, accommodating pressure and volume changes as the engine warms and cools. They must resist heat, coolant chemistry and pressure to maintain sealing at connectors and clamps. On Porsche models these hoses follow specific routing and often include shaped sections or moulded ends to fit tight clearances.
Benefits Include
- Restored coolant flow and pressure regulation
- Reduced risk of leaks and air ingress into the cooling system
- Improved temperature stability for the engine and ancillary components
Why Expansion Tank Hoses Wear and Fail
- Repeated heat cycles causing rubber fatigue and cracking
- Degradation from coolant additives and chemical exposure
- Failure of clamps, connections or moulded terminations leading to leaks
The Importance of Replacing with OEMatch Expansion Tank Hoses
A failing expansion tank hose can allow coolant loss, introduce air into the circuit or upset system pressure, any of which can lead to overheating and potential engine damage. Replacing worn hoses is a preventative maintenance task that helps maintain cooling system integrity and avoids secondary faults.
Advantages
- Direct-fit replacements engineered to match original dimensions and tolerances
- Selected for Porsche applications to suit original routing and clearances
- Supplied in materials chosen for resistance to coolant and heat exposure
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified.
