Engine Oil Sump Plug Washer. Porsche 911 1972-83  ❭  90012301120

Engine Oil Sump Plug Washer.
This Porsche Genuine OE Engine Oil Sump Plug Washer is a factory-specified sealing washer designed for the engine oil sump drain plug used on classic air-cooled Porsche 911 models. Manufactured to Porsche’s original specifications, this washer provides the correct sealing surface between the sump drain plug and the engine crankcase, helping maintain a leak-free lubrication system during routine service.
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Fits:
Porsche 911 1972 - 1983

Diagram ref no 42

The sump plug washer sits between the engine oil drain plug and the sump opening. When the drain plug is tightened during an oil change, the washer compresses slightly to form a tight seal, preventing oil from leaking around the drain plug threads.

Replacing the washer during service helps ensure proper sealing and protects the engine from oil loss.

Fitment / Position on Car
• Fitting position: Engine oil sump drain plug
• Location: Between the drain plug head and sump housing
• System: Engine lubrication system

Drain plug washers are designed to compress once during tightening to form a proper seal. Reusing old washers can lead to oil seepage or incomplete sealing, which may result in oil loss or contamination of surrounding components. Installing a new genuine Porsche washer during each oil service ensures a clean, leak-free seal and reliable engine lubrication.

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90012301120

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