Please wait… 
Please wait while we process your order,
do not press the back button… 
Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram
Crankshaft seal. Porsche 928 - 99911326340
99911326340/1
Product Information
Product Information
Crankshaft seal. 60 X 85 X 10 mm
Front crankshaft seal also known as a shaft sealing ring. It sits at the front of the engine, sealing the point where the crankshaft passes through the engine block - typically behind the vibration damper or timing gear. Its purpose is to keep engine oil contained while allowing the crankshaft to spin freely.

Fits:
Porsche 928 1978 - 1995

Diagram ref no 3

Over time, the crankshaft seal can wear down from constant heat, oil exposure, and friction. The rubber lip may harden, crack, or become damaged, losing its ability to seal properly. When this happens, oil begins to leak, which can create a mess, damage engine components, or cause belts and pulleys to slip if oil spreads across them.

How to Know If It’s Failing:
You might suspect the seal is failing if you notice:
•    Oil dripping or forming a puddle under the front section of the engine.
•    Visible oil seepage around the crankshaft front seal area.
•    Smoke or burning smell under the hood (oil hitting a hot surface). Low oil levels without visible external damage.
•    After so many miles or long periods without seal maintenance, even if there’s not a massive leak yet.

If a worn front crankshaft seal isn’t replaced, the oil leak will usually worsen over time. This can lead to significant oil loss and starve the engine of proper lubrication, causing serious internal damage. Leaking oil may also spread onto belts and pulleys, leading to slippage, premature wear, or even belt failure. In addition to making a mess and degrading nearby components, oil on hot surfaces can pose a fire hazard. Left unchecked, the problem often becomes more expensive to fix, especially if the leak reaches sensors, wiring, or other critical parts.  

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99911326340
99911326340
19409

The product you are viewing cross references to these numbers
Related products