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- 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Related, superseded, cross reference or alternative numbers for comparison.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
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- 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
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Clamp D1 20x15 – Multi-Position Clamp
High-quality D1 20x15 clamp designed for securing various components across Porsche 924S, 944, 928, 964, and 993 models.
This versatile clamp is used in multiple applications including bonnet release cables (924S / 944), expansion tank hoses (944), engine wiring loom (928 S4), injection vacuum hoses (964), and brake reservoir connections (993).
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- 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
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Diagram ref no 24
Manufactured to OEM specifications, this clamp ensures secure fitment, durability, and resistance to corrosion. Supplied individually, it is ideal for maintenance, repair, or restoration across multiple Porsche systems.
Key Features
• Clamp size D1 20x15
• Suitable for Porsche 964S, 944, 928, 964, and 993
• Part number 99951117701
• Multi-use: cables, hoses, wiring looms, vacuum lines
• Ensures secure mounting and routing
• Prevents vibration-related wear and movement
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually
Function and Purpose
This clamp is designed to secure a wide range of components.
It helps to:
• Hold cables, hoses, and wiring looms in place
• Maintain correct routing and alignment
• Prevent vibration-related wear or damage
• Protect sensitive systems such as wiring and vacuum lines
• Ensure long-term reliability across multiple systems
Why Replace Clamps
Clamps can degrade over time due to heat and environmental exposure.
Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Movement of hoses, cables, or wiring
• Increased risk of system wear or failure
Replacing worn clamps ensures proper securing and protects critical components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99951117701
The product you are viewing cross references to these numbers