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- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
Sold each.
Fits:
Porsche 924 1976-85
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477819319A
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Heater Box Drain Hose
Maintain the efficiency and longevity of your classic
Porsche heating system with this OE Match Heater Box Drain Hose. Manufactured to closely match the original factory
specification, this ensures moisture and condensation are safely drained away from the heater box,
helping to protect surrounding components from corrosion and deterioration.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Diagram ref no 19
Ideal for routine maintenance or full restoration projects, this OE Match drain hose provides the correct fit and reliable performance expected from an original-style replacement.
What Does the Heater Box Drain Hose Do?
The heater box drain hose plays an important role in the operation of the air-cooled Porsche heating system.
Its functions include:
- Draining condensation and moisture from the heater box.
- Helping prevent water from collecting inside the heating system.
- Protecting the heater box and surrounding bodywork from corrosion.
- Reducing the risk of trapped moisture causing rust or deterioration.
- Maintaining efficient operation of the heating and ventilation system.
Although often overlooked, this simple hose helps preserve both the heating system and the surrounding chassis.
Why Does the Heater Box Drain Hose Fail?
The original drain hose is continually exposed to heat, moisture, road debris and age, causing the rubber material to deteriorate over time.
Common causes of failure include:
- Rubber becoming brittle and cracking with age.
- Splits caused by repeated heat cycles.
- Hardening due to engine bay temperatures.
- Blockages from dirt, leaves or road debris.
- Perishing caused by prolonged exposure to moisture and contaminants.
- Damage during engine or heater system maintenance.
A damaged or blocked drain hose can allow moisture to remain inside the heater box, increasing the risk of corrosion and reducing heating system efficiency.
When Should It Be Replaced?
Replacement is recommended when:
- The hose is cracked, split or hardened.
- Signs of water retention or corrosion are found around the heater box.
- The heating system is being restored or serviced.
- The engine is removed, providing easy access.
- Restoring a classic Porsche to factory specification.
- Carrying out preventative maintenance on an ageing vehicle.
Replacing the drain hose is an inexpensive way to help protect the heating system and surrounding bodywork from long-term moisture damage.
OE Match Features
- OE Match quality replacement.
- Manufactured to replicate original factory dimensions.
- Durable rubber construction.
- Correct fit and routing for factory heater box assemblies.
- Helps maintain proper heater box drainage.
- Suitable for restoration, repair and preventative maintenance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90157132632
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 1978-1989
Diagram ref no 19
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91142451500
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Rubber sealing ring / gasket used in the HVAC/heater/ventilation system of classic 911 / 912 cars. Its sealing points where heater/vent hoses pass through body or bulkhead. Ideal when refurbishing HVAC ducts, replacing heater hoses, restoring classic 911/912 ventilation and heat systems.
Sold each. 2 required per vehicle.
Fits:
Porsche 911 1965 - 1989 all models
Diagram ref no 18
Because over decades the original sealing rings often become brittle, hard, compressed or cracked (due to heat cycles, age, vibration, exposure to cabin air, moisture and dust), they lose their ability to seal properly.
This can lead to:
• Unwanted air leaks or drafts into cabin
• Water or dust ingress into the interior or into heater ducts
• Poor heating or ventilation performance
• Increased cabin noise, wind-noise or fumes entering cabin (especially on vehicles with engine-bay to cabin vents).
Replacing with a correct-spec sealing ring ensures a tight, flexible seal that restores proper HVAC function, occupant comfort, and helps preserve the integrity of the car’s interior and ventilation system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90157291301
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 1975-89
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91142471103
The product you are viewing cross references to these numbers