Crankshaft Seal

Crankshaft Seal for Preventing Engine Oil Leaks

A crankshaft seal is designed to seal the area where the crankshaft passes through the engine housing. Its main role is to keep engine oil inside the engine while allowing the crankshaft to rotate smoothly. When this seal becomes worn, hardened or damaged, oil may start to leak from the front or rear of the engine, often around the timing cover, crank pulley or transmission side. At Auto Parts Market, we help customers find crankshaft seal parts matched to specific engines, including front crankshaft seal, rear crankshaft seal, radial shaft seal, sealing flange and related crankshaft sealing components.

Front Crankshaft Seal and Rear Main Seal - What Is the Difference?

The front crankshaft seal is usually positioned near the crankshaft pulley or timing cover area. If it fails, oil may appear at the front of the engine, around belts, pulleys or lower engine covers. This type of leak can sometimes be mistaken for a timing cover gasket or sump gasket problem, so checking the exact leak point is important before ordering parts.

The rear crankshaft seal, often called the rear main seal, is located at the back of the engine, close to the gearbox or transmission. A leak in this area can be more difficult to access and may require more labour during repair. Both seals perform a similar function, but they are not interchangeable and must be selected according to their exact engine position.

Symptoms of a Worn Crankshaft Oil Seal

A failing crankshaft oil seal can leave oil marks under the vehicle, create wet areas around the engine block or cause oil to spread onto nearby components. In some cases, oil may reach the drive belt, timing area, flywheel housing or lower covers. If the leak continues, the engine oil level can gradually drop, increasing the risk of poor lubrication. Oil leaks should not be ignored, especially when they appear near rotating parts. A small seal failure can become a bigger repair if oil contaminates belts, rubber components, sensors or underbody parts.

Crankshaft Seal Parts for UAE Engine Repairs

Crankshaft seals are engine-specific. A BMW crankshaft seal, Mercedes-Benz radial shaft seal, Nissan front crankshaft seal, Toyota oil seal or Mitsubishi rear seal can differ in size, lip design, material, flange style and installation depth. OE number, engine code, production year and repair location should always be checked before ordering. Auto Parts Market supports drivers, workshops and trade buyers in Dubai and across the UAE with genuine and aftermarket crankshaft seal solutions. Choose the right front crankshaft seal, rear main seal, sealing flange or retainer to restore proper oil sealing and support reliable engine operation in demanding UAE conditions.