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Radiator Top / Bottom Hoses
- Porsche 944 Turbo 2.5L 8V 1989-91
This OE Match Complete Water Hose Kit is a comprehensive cooling system refresh package designed specifically for the Porsche 944 2.5L Turbo (1989–1991). The kit includes all primary coolant hoses required to restore proper coolant circulation throughout the engine and turbo cooling system.
Fits:
Porsche 944 2.5L Turbo 1989 - 1991
Diagram ref no 11, 12, 13, 14, 16, 17, 19, 25, 33 and 36A
The Porsche 944 Turbo (951) operates under significant thermal load due to its turbocharged engine. Over time, original rubber coolant hoses are subjected to:
• High operating temperatures
• Coolant pressure cycles
• Turbo heat exposure
• Age-related rubber degradation
This can lead to cracking, swelling, softening, internal breakdown, or sudden coolant leaks - all of which increase the risk of overheating and engine damage.
This kit includes 12 factory-spec coolant hoses for a full cooling system refresh and improved reliability under boost.
Replacing the full set at once ensures consistent material age, improved reliability, and reduces the risk of future weak points within the cooling circuit.
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WATERPIPEKIT944T
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 944S2 3.0L 16V 1989-91
Fits:
Porsche 944 S2 3.0L 1989-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 17, 20, 23, 25, 27, 28, 30, 34, 37 and 39.
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WATERPIPEKIT04
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 944 2.5L 8V 1982-87
Fits:
Porsche 924 - 1976 to 1985
Porsche 944 - 1982 to 1985
Click 'Zoom in' for large parts diagram.
Diagram ref no 14
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046121099
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- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
Fits:
Porsche 944 S 1987-88
Porsche 944 S2 1989-91
Diagram ref. 26.
Related reference numbers
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94410609101
The product you are viewing cross references to these numbers
- Porsche 944 2.5L 8V 1982-87
Fits:
Porsche 944 1982-85
Diagram ref no 8
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Related, superseded, cross reference or alternative numbers for comparison.
94410623705
The product you are viewing cross references to these numbers
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
Fits:
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
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94410623707
The product you are viewing cross references to these numbers
- 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
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Fits:
- 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
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
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95110623704
The product you are viewing cross references to these numbers
- 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
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Fits:
- 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
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
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95110623704
The product you are viewing cross references to these numbers
- Porsche 944 2.5L 8V 1982-87
The OE Match Radiator Hose Bottom to Water Pump is a high-quality replacement cooling system hose designed to carry cooled coolant from the lower section of the radiator directly to the engine water pump. Manufactured to OE specifications for fit, durability and performance, this hose is a vital component in maintaining efficient coolant circulation and engine temperature control.
Fits:
- Porsche 944 2.5L 8V 1982-87
Diagram Ref No 8
Constructed from premium heat-resistant and coolant-resistant rubber materials, the hose is engineered to withstand continuous exposure to temperature fluctuations, coolant pressure and engine bay conditions. It ensures a secure and leak-free connection between the radiator and water pump, helping to maintain the effectiveness of the entire cooling system.
What This Product Does:
- Transfers cooled coolant from the radiator to the water pump.
- Supports continuous coolant circulation throughout the engine.
- Helps maintain correct engine operating temperatures.
- Provides a secure and leak-resistant connection within the cooling system.
- Assists in preventing engine overheating.
- Supports efficient cooling system performance.
- Contributes to long-term engine reliability and protection.
Symptoms Wear Or Failure:
- Visible coolant leaks around the hose or connections.
- Coolant drips beneath the vehicle.
- Low coolant level warnings.
- Engine overheating or fluctuating temperature readings.
- Sweet coolant smell from the engine bay.
- Cracks, splits or bulges in the hose material.
- Soft, swollen or brittle rubber construction.
- Coolant residue around hose fittings.
- Loss of cooling system pressure.
Why Replacement Matters:
- Lower radiator hoses operate in demanding conditions and are continuously exposed to coolant flow, pressure changes, heat cycles, vibration and environmental ageing. Over time, the rubber material can deteriorate, harden, crack or weaken, increasing the likelihood of leaks or sudden hose failure.
- A damaged radiator hose can lead to coolant loss, reduced cooling efficiency and engine overheating. If coolant circulation is interrupted, critical engine components may be exposed to excessive temperatures, potentially resulting in costly engine repairs. Even minor leaks can progressively worsen and compromise the reliability of the cooling system.
- Replacing a worn radiator hose restores proper coolant circulation, helps maintain correct engine temperatures and protects against overheating-related damage. An OE Match replacement provides factory-style fitment, dependable durability and long-term performance, ensuring reliable operation of your Porsche cooling system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410623705
The product you are viewing cross references to these numbers
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
Direct-fit replacement hose for the radiator lower hose on Porsche 944 road cars (models 1985 through 1989). It connects the bottom outlet of the radiator to the water pump inlet, forming a critical part of the engine’s coolant circulation system. Precision-moulded to original shape and dimensions, this hose fits exactly as the factory part did - ensuring correct routing, secure sealing, and reliable coolant flow under pressure and high engine temperatures.
Fits:
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
• Application: Lower radiator hose — radiator bottom outlet → water pump inlet.
• Ideal Use Cases: Cooling system maintenance, hose replacement during service, overheating prevention, or when original hose shows wear, cracks or leaks.
Coolant hoses are subject to continuous heat cycling, coolant chemical exposure, and flexing from engine vibration. Over time the rubber can degrade - becoming brittle, soft, cracked, or swollen. A failing radiator hose may lead to:
• Coolant leaks - causing low coolant levels or visible drips under the car.
• Engine overheating - risking long-term engine damage or immediate breakdown.
• Loss of coolant pressure or air ingress - potentially reducing cooling system efficiency.
Using a new hose restores reliable coolant circulation, helps prevent leaks, supports stable engine temperature, and reduces the risk of costly engine overheating or damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410623707
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 944 1985-91
Click 'Zoom in' to see the diagram.
Diagram ref no 9.
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94410623907
The product you are viewing cross references to these numbers
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Fits:
Porsche 944 Turbo 1985-91
Click 'Zoom in' to see the diagram.
Diagram ref no 14.
Related reference numbers
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95110624101
The product you are viewing cross references to these numbers
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Radiator Top Hose for Porsche 944 Turbo
Maintain optimal cooling system performance in your Porsche
944 turbo with this OE Match Radiator Top Hose. Specifically designed for Porsche 944 turbo (951) models
produced between 1985 and 1991, this high-quality replacement hose ensures
reliable coolant circulation between the engine and radiator, helping to
maintain stable operating temperatures under both normal and high-performance
driving conditions.
Fits:
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Diagram ref no 14
Manufactured to match original equipment specifications, this radiator top hose provides excellent fitment, durability and resistance to the elevated temperatures and pressures generated by the turbocharged Porsche 951 engine. Whether you're restoring a classic Porsche, carrying out preventative maintenance or addressing cooling system issues, replacing ageing coolant hoses is essential for preserving engine reliability.
What Does the Radiator Top Hose Do?
The radiator top hose is a critical component of the Porsche 944 Turbo cooling system. Its primary function is to transport hot coolant from the engine to the radiator, where heat is dissipated before the coolant recirculates through the engine.
Turbocharged engines generate significantly higher thermal loads than naturally aspirated models, making efficient coolant flow especially important. The radiator top hose must withstand constant exposure to high temperatures, pressure fluctuations and engine vibration while maintaining a secure and leak-free connection.
A properly functioning radiator top hose helps:
- Maintain correct engine operating temperatures.
- Prevent overheating during spirited driving.
- Ensure efficient coolant circulation.
- Support overall cooling system performance.
- Protect critical engine components from heat-related damage.
Why Do Porsche 944 Turbo Radiator Top Hoses Fail?
Over time, the original rubber hose is subjected to extreme
operating conditions. Common causes of failure include:
- Heat-related rubber hardening and deterioration.
- Internal breakdown caused by ageing coolant.
- Surface cracking and perishing.
- Pressure fatigue from repeated heating and cooling cycles.
- Swelling and softening from prolonged coolant exposure.
- Weakening around hose clamp locations.
- Small splits that develop into major coolant leaks.
As many Porsche 944 Turbo models are now over 30 years old, original cooling system hoses are often well beyond their intended service life.
When Should the Radiator Top Hose Be Replaced?
Routine inspection of all cooling system hoses is strongly
recommended. Replacement should be considered if you observe:
- Coolant leaks near the radiator or engine.
- Cracks, bulges or visible deterioration.
- Soft, spongy or excessively hard hose sections.
- Coolant loss without obvious explanation.
- Engine temperature fluctuations.
- Signs of coolant residue around hose connections.
- During major cooling system servicing or restoration work.
Preventative hose replacement is significantly less expensive than repairing damage caused by overheating and coolant loss.
Porsche 944 turbo (951) Cooling System Maintenance
For enthusiasts searching for a Porsche 944 Turbo radiator top hose replacement, Porsche 951 coolant hose, OE Match 95110624101 hose or Porsche 944 Turbo cooling system repair parts, this replacement hose provides the correct fit and performance expected for the turbocharged transaxle Porsche platform.
The Porsche 951 cooling system operates under demanding conditions and relies on properly functioning hoses to maintain coolant flow and pressure. Replacing ageing coolant hoses alongside thermostats, water pumps, radiators, expansion tanks and cooling system sensors helps ensure maximum reliability and cooling efficiency.
This OE Match radiator top hose is designed to meet the requirements of Porsche 944 Turbo models from 1985 to 1991 and offers dependable performance for both road and enthusiast use.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95110624101
The product you are viewing cross references to these numbers
- 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
Radiator Top Hose
Keep your Porsche 944 cooling system operating at peak
efficiency with this OE Match Radiator Top Hose, designed specifically for
Porsche 944 models manufactured between 1985 and 1991. This critical cooling
system component provides a reliable connection between the engine and
radiator, ensuring the continuous flow of coolant needed to regulate engine
temperatures and prevent overheating.
Fits:
- 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
Diagram ref no 9
Manufactured to OE specifications, this replacement radiator top hose delivers excellent fitment, durability and resistance to the high temperatures and pressures experienced within the Porsche 944 cooling system. Whether you are carrying out preventative maintenance, repairing a coolant leak or restoring a classic transaxle Porsche, replacing worn cooling hoses is essential for long-term reliability.
What Does the Radiator Top Hose Do?
The radiator top hose is one of the most important hoses within the Porsche 944 cooling system. It carries hot coolant from the engine to the radiator, where excess heat is dissipated before the coolant circulates back through the system.
Without a properly functioning radiator top hose, coolant flow can become restricted or interrupted, leading to overheating, pressure loss and potential engine damage. The hose must withstand constant temperature fluctuations, pressure changes and vibration while maintaining a secure seal at both ends.
Why Do Radiator Top Hoses Fail?
Over time, radiator hoses naturally deteriorate due to
exposure to heat, pressure and coolant chemicals. Common causes of failure
include:
- Age-related rubber hardening and cracking.
- Internal hose degradation from coolant contamination.
- Swelling caused by prolonged heat exposure.
- Surface perishing and loss of flexibility.
- Weakening around hose clamp connection points.
- Splits, bulges or soft spots developing within the hose wall.
Many Porsche 944 models are now several decades old, making cooling system hose replacement an important preventative maintenance task.
When Should the Radiator Top Hose Be Replaced?
Radiator hoses should be inspected regularly and replaced
whenever signs of wear become evident. Replacement is recommended if you
notice:
- Coolant leaks around the hose connections.
- Cracked, brittle or swollen rubber.
- Coolant smells after driving.
- Soft or excessively hard hose sections.
- Unexplained coolant loss.
- Rising engine temperatures or overheating concerns.
- During cooling system overhauls or engine restoration projects.
Replacing ageing hoses before failure occurs can help prevent expensive engine repairs and roadside breakdowns.
Porsche 944 Cooling System Hose Replacement
For owners searching for a Porsche 944 upper radiator hose replacement, OE match coolant hose, Porsche 944 cooling system repair parts or radiator hose upgrade, this component offers an ideal solution that maintains original cooling system performance.
A healthy cooling system is essential for preserving engine reliability, particularly on classic Porsche models. Replacing ageing radiator hoses alongside thermostats, water pumps, expansion tanks, coolant sensors and other cooling system components can significantly improve system efficiency and long-term dependability.
Designed for Porsche 944 models produced from 1985 to 1991, this OE-quality radiator top hose provides dependable coolant flow and helps maintain stable operating temperatures under all driving conditions.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410623907
The product you are viewing cross references to these numbers
- Porsche 944 2.5L 8V 1982-87
Fits:
Porsche 944 2.5L 1981-1983 Engine type: 4401 / 4402 / 4403 / 4404
M >> 41D 1285
M >> 41D 5164
M >> 43D 3439
M >> 43D 5517
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
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94410623912
The product you are viewing cross references to these numbers
- Porsche 944 2.5L 8V 1982-87
Fits:
Porsche 944 2.5L 1981-1983 Engine type: 4401 / 4402 / 4403 / 4404
M >> 41D 1285
M >> 41D 5164
M >> 43D 3439
M >> 43D 5517
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
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94410623912
The product you are viewing cross references to these numbers
Radiator Top & Bottom Hoses – Reliable Cooling for Porsche Performance
Radiator top and bottom hoses are vital components of your Porsche’s cooling system, responsible for transporting coolant between the radiator and the engine. The top hose carries hot coolant from the engine to the radiator for cooling, while the bottom hose returns the cooled fluid back to the engine, maintaining optimal operating temperatures for performance, efficiency, and reliability.
At Design911, we offer a full range of genuine and manufacturer-quality radiator top and bottom hoses for Porsche models including 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each hose is precision-engineered for perfect fitment, high pressure tolerance, and exceptional heat resistance — ensuring reliable cooling under the most demanding driving conditions.
What Do Radiator Top and Bottom Hoses Do?
Coolant hoses are the lifelines of your Porsche’s cooling
system, and the radiator hoses perform the following key functions:
- Carry
coolant between the radiator and the engine.
- Regulate
engine temperature for consistent performance.
- Maintain
coolant pressure throughout the cooling circuit.
- Prevent overheating by ensuring efficient heat transfer.
Both the top and bottom hoses are designed to withstand high heat, vibration, and coolant pressure, providing dependable performance in every driving scenario.
Why Do Radiator Hoses Fail?
Over time, radiator hoses deteriorate due to heat, pressure,
and exposure to coolant. Common causes of hose failure include:
- Rubber
cracking or hardening from continuous heat cycles.
- Swelling
or soft spots due to coolant chemical breakdown.
- Leaks
at hose ends or clamps from pressure loss.
- Abrasion
damage caused by engine vibration or contact.
- Age-related material fatigue, especially in older vehicles.
Symptoms of hose failure include coolant leaks, visible cracks or bulges, fluctuating engine temperature, or a noticeable coolant smell in the engine bay.
Why Replace Faulty Radiator Hoses?
A leaking or weakened radiator hose can lead to overheating, coolant loss, and potential engine damage. Replacing these hoses as part of routine maintenance ensures consistent cooling performance and reliability.
Benefits of replacement include:
- Restored coolant flow and temperature stability.
- Prevention of leaks and overheating.
- Improved cooling system pressure and performance.
- Manufacturer-quality materials for long-term durability.
All radiator hoses in this range are made using reinforced, high-grade rubber and polymer compounds, designed to meet or exceed factory specifications for heat resistance, flexibility, and longevity.
