These bearings are basically the support system for the crankshaft inside your engine. The crankshaft is what turns and ultimately powers the wheels, and these bearings let it spin smoothly. They’re these little metal shells that sit inside the engine block, and the crankshaft journals—those are like the axles on the crankshaft—ride on them. It’s a precise fit, designed to minimize friction and handle a lot of stress. They provide a low – friction surface and maintain proper oil clearance. As I said, they’re critical to the crankshaft’s movement. Think of it like this: the crankshaft is doing a lot of heavy lifting, turning constantly, and these bearings allow it to do that without grinding itself to pieces. Without them, the crankshaft would be directly rubbing on the engine block, and that would be a disaster. They’re right there in the bottom end of the engine, supporting the rotating assembly. These bearings take a beating. Constant rotation, high pressures, heat… they’re under a lot of stress. Over time, they wear down. You’ll notice if they start to go bad usually with a knocking sound coming from the engine – kind of a deep, rhythmic thud. That’s the crankshaft starting to move around too much inside the engine. They act like a shield, protecting more expensive components. If you ignore a failing main bearing, it can lead to serious engine damage, even a complete engine failure. It's much cheaper to replace these now than to rebuild the whole engine later. You can find a good set, like these, at places like Fixparts Online, and it's something that's often done during an engine rebuild or if you're addressing a known issue with engine noise. Trusted brand, trusted warranty: Main Bearing Set VW/Audi 1.9 TDI (MPN 77152600) is covered for 12 months!

About Kolbenschmidt

Kolbenschmidt specializes in high-quality engine components, including pistons, cylinders, and bearings, for optimal engine performance.

Why Choose Kolbenschmidt?

• Kolbenschmidt parts are made to the same high standards as the original equipment in your vehicle, so you get reliable performance. • We have a huge range of parts available, covering many different makes and models – from older cars to the latest vehicles. • Our parts are tested rigorously to make sure they can handle tough conditions and last a long time. • Kolbenschmidt has been a trusted name in the auto parts industry for over 100 years – we know what it takes to keep your engine running smoothly. Kolbenschmidt delivers excellence, FixParts Online delivers to your door.