Oil Tank Drain Plug Washer. Porsche 911 1970-89  ❭  90012301120

Oil Tank Drain Plug Washer.
This Porsche Genuine OE Oil Tank Drain Plug Washer is a factory-specified sealing washer designed for the oil tank drain plug used on classic air-cooled Porsche 911 models. Manufactured to Porsche’s original specifications, this washer ensures a reliable seal between the drain plug and the oil tank, preventing oil leaks during engine operation or after routine oil changes.
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Fits:
Porsche 911 1970 - 1989

Diagram ref no 12.

This drain plug washer acts as a compressible sealing ring that sits between the oil tank drain plug and the oil tank surface. When the drain plug is tightened, the washer compresses slightly to create a tight oil-resistant seal, preventing oil from leaking around the plug threads.

It is designed to withstand high temperatures, engine oil exposure, and repeated service cycles, making it essential for maintaining a clean and leak-free lubrication system.

Fitment / Position on Car
•  Installed on: Oil tank drain plug
•  Location: Between the drain plug head and oil tank surface
•  System: Dry-sump engine oil lubrication system used in classic 911 models

During an oil change, the drain plug washer compresses to create a seal. Reusing old washers can lead to oil seepage, contamination, or loose sealing surfaces. Installing a new genuine Porsche washer ensures a proper seal every time the drain plug is removed and reinstalled, protecting both the engine and surrounding components from oil leaks.

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90012301120

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