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Heater hoses & pipes
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
The Genuine Porsche 92857410603 coolant / heater pipe is an OE cooling and heater system pipe for Left Hand Drive Porsche 928 1978–1995 models. It helps route coolant through the heater circuit, supporting correct cabin heater operation and cooling system function. Ideal for replacing a leaking, corroded or damaged original pipe while maintaining Genuine Porsche fitment and quality.
Fits:
for LHD (Left hand drive) cars only
Porsche 928 1978 - 1995
Diagram ref no 5
The coolant / heater pipe carries engine coolant through the heater circuit, allowing hot coolant to flow to the heater system for cabin heating and demisting. A correctly fitted pipe helps maintain coolant flow, system pressure, and heating performance while preventing leaks from aged or corroded pipework.
Functions
• Replaces the coolant / heater pipe
• Designed for Left Hand Drive vehicles
• Routes coolant through the heater circuit
• Supports cabin heater and demister operation
• Helps maintain cooling system pressure and circulation
• Helps prevent coolant leaks from worn or corroded pipework
• Suitable for heater system service, coolant leak repair, or restoration
• OE Match replacement for Porsche 928 heating and cooling system maintenance.
Why Replace This Part?
Coolant and heater pipes can corrode, crack, block, leak, or become damaged due to age, coolant exposure, heat cycles, pressure, and long-term use. A worn pipe may cause coolant loss, poor heater performance, coolant smell, dampness, pressure loss, or overheating symptoms. Replacing the pipe helps restore reliable coolant flow and heater system operation.
When to Replace This Part
• Coolant leak is visible from the heater pipe area
• Pipe is corroded, cracked, damaged, or blocked
• Heater output is poor or inconsistent
• Coolant smell or residue is present
• Cooling system pressure loss is detected
• Heater system or cooling system service is being carried out
• Vehicle is undergoing Porsche 928 restoration or preventive maintenance
Where it fits on the car
This pipe fits within the coolant / heater circuit on Left Hand Drive Porsche 928 models. It forms part of the coolant routing between the engine cooling system and the cabin heater system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92857410603
The product you are viewing cross references to these numbers
OEMatch Heater hoses & pipes — Durability, Sealing, Performance
OEMatch supplies many parts for Porsche heating and cooling systems, including heater hoses and coolant pipes selected for material suitability and model coverage for Porsche vehicles.
Understanding OEMatch Heater hoses & pipes
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original heater hoses & pipes.
OE (Original Equipment) refers to parts matching original specifications for the heater hoses & pipes and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM heater hoses & pipes engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Heater hoses and pipes carry hot coolant from the engine to the heater core and return cooled fluid to the cooling circuit. They maintain coolant flow, support cabin heating, and help prevent air ingress and leaks that can affect engine temperature control.
Benefits Include
- Restores coolant circulation to support cabin heating and engine temperature control
- Reduces the risk of coolant leaks that can lead to overheating
- Materials selected for heat and pressure resistance suitable to Porsche applications
- Replacements that align with original mounting points and connection types
Why Heater hoses & pipes Wear and Fail
- Age-related rubber degradation causing cracking, swelling or hardening
- Corrosion or pinhole defects in metal pipes
- Coolant contamination or chemical breakdown leading to internal deterioration
- Loose, damaged or corroded clamps and fittings allowing leaks
The Importance of Replacing with OEMatch Heater hoses & pipes
Replacing worn heater hoses and pipes restores reliable coolant flow and cabin heating while lowering the chance of coolant loss and engine overheating. Regular inspection and timely replacement helps maintain system pressure integrity and avoids secondary damage to the heater core, water pump or head gasket. Choose components that match your Porsche model and the correct connection types to ensure straightforward installation and ongoing system reliability.
Advantages
- Selected materials for resistance to heat, pressure and corrosion
- Designed to match original dimensions and hose routing where applicable
- Suitable for maintenance, restoration and preventative servicing
Support & Advice
These items can appear straightforward to fit but may require specific procedures such as correct routing, adjustment and securing of hose / pipe ends. If you lack the correct tools or are unsure about hidden fastenings or sensors, seek professional installation.
