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Alternator Fan / Impeller
- 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
Fits:
Porsche 911/912 (1965-1969) (911 up Through 68)
Porsche 911T/E/S Carrera RS (1970-73)
Porsche 911/911S / Carrera (1974-1977)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90110601003
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 1975-1977 3.0L Turbo (930)
This impeller blade fan centre support is a high-quality replacement centre hub support for the engine cooling fan (alternator/generator impeller) on early Porsche 911 models.
Fit:
Porsche 911/912 (1965-1969) (911 up Through 68)
Porsche 911T/E/S Carrera RS (1970 - 1973)
Porsche 911/911S / Carrera (1974 - 1977)
The fan centre support forms the core mounting structure for the cooling fan (impeller) that attaches to the alternator / generator shaft. It ensures the cooling fan is securely aligned and balanced, allowing it to draw air through the engine compartment and over the engine’s cylinder heads and oil cooler - helping regulate operating temperatures and prevent overheating.
On classic air-cooled 911 engines, the cooling fan is critical to drawing fresh air through the engine bay and sustaining proper temperatures. The centre support (hub) is the backbone of the fan assembly - if it’s worn, corroded, or damaged:
• The fan can wobble or run out of balance
• Bearing loads on the alternator/generator can increase
• Cooling airflow can diminish
• Noise and vibration can increase.
Replacing an old or deteriorated centre support with an OE Match unit restores precise fan alignment, improves cooling efficiency, and helps protect surrounding engine components from heat-related wear.
When to replace. Replace the fan centre support if you notice any of the following:
• Excessive fan wobble or vibration
• Noisy operation from the fan or alternator area
• Visible corrosion or wear on the old hub
• During overhaul of the fan, generator/alternator, or cooling system
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9011060100X
The product you are viewing cross references to these numbers
Alternator Fans & Impellors for Effective Cooling and Long-Lasting Performance
Alternator fans and impellors are essential cooling components that regulate the temperature of the alternator or generator during operation. As the alternator produces electrical power, it generates heat—making efficient airflow and cooling critical for maintaining optimal charging performance. These fans are engineered to draw air through the alternator housing, prevent heat buildup, and protect sensitive internal components from thermal stress.
What Alternator Fans / Impellors Do
Alternator fans and impellors perform several essential
functions:
- Direct
airflow across the alternator, reducing heat and extending component
life
- Maintain
consistent charging performance by preventing overheating
- Protect
internal bearings, rectifiers and windings from thermal damage
- Support
high-output alternators that run under heavier electrical loads
- Improve reliability in both standard and performance-oriented engines
Whether you are maintaining a classic model or upgrading a modern performance vehicle, an effective cooling fan is key to alternator longevity.
Why Alternator Fans & Impellors Fail
Despite being robust components, alternator fans can fail
over time due to mechanical stress, environmental exposure and vibration.
Common causes include:
- Metal
fatigue from continuous heat cycles
- Corrosion
due to moisture, dirt and road contaminants
- Cracked
or bent blades from debris strikes or worn mounting surfaces
- Loose
fittings causing imbalance and vibration
- Wear from high-output alternator upgrades that exceed the original cooling capacity
Faulty or weakened fans result in reduced airflow, causing the alternator to run hotter and less efficiently.
Why You Should Replace a Worn Alternator Fan / Impellor
A failing alternator cooling fan can lead to serious electrical system issues. Without proper airflow, the alternator may overheat, reducing charging performance and accelerating wear on internal components. Replacing the part with a high-grade, precision-built alternative engineered to match original performance standards ensures reliable cooling and prevents premature alternator failure.
Benefits of replacement include:
- Restored cooling efficiency and airflow
- Reduced alternator temperature under load
- Prevention of internal overheating and electrical faults
- Enhanced durability and component lifespan
- Improved reliability for daily and performance driving
A quality alternator fan is a cost-effective safeguard against much more expensive charging system repairs.
