A bearing is a device that supports a mechanical element and allows it to move relative to another part with minimal power loss.
Function Plain bearings provide support and guidance for moving components within the engine. Their primary function is to allow these components to rotate virtually wear-free. Plain bearings are made up of one or two bearing shells securely locked into the bearing seat.
At the bearing journals, the bearing shells wrap around the rotating shaft. Through a borehole, engine bearings are pushed into the plain bearing. The shaft virtually glides above the oil film during regular engine operation without contacting the bearing shell.
Internal combustion engines use sleeve-type sliding bearings on their rotating components. Rolling bearings, which transmit a load to a relatively small area of the ring surface via rolls (balls), cannot withstand the loading conditions of internal combustion engines.
There is one at each end of the crankshaft. The main bearing comprises two parts—an upper and lower limit. An oil groove is commonly found on the inner surface of the upper part of the main bearing.
The lower main engine bearing has a hole for passing oil to the crankshaft feed holes. Furthermore, several main bearings also include practical component elements responsible for supporting axial loads and preventing movement along the engine’s crankshaft axis.
Functions Engine Bearings
- Thrust Bearings
Crankshaft thrust bearings in an engine block are installed in grooves formed in the block’s webbing. Their purpose is to limit the forward and backward movement of the crankshaft. As a result, the crankshaft is kept within a specific range of motion.
- Connecting Rod Bearings
Connecting rod bearings are installed in the connecting rod’s large end. A bearing is made up of two parts. Rod bearings allow the crankpin to rotate within the connecting rod.
- Con-Rod Bushings
Small end bushings provide the piston’s relative motion. They are connected to the piston about the connecting rod.
- Camshaft Bearings
Camshaft bearings hold the camshaft in place in the engine and allow it to rotate. As a result, your old engine bearings can reveal a lot about your engine. In addition, circumstances may have contributed to their failure. All bearings will show signs of wear. However, a close inspection may reveal some scoring, wiping, dirt, or other debris embedded in the surface of the bearings.
How to Determine Engine-Bearing Failure
Determining the root cause of a bearing failure is critical in preventing a recurrence of the loss. A simple bearing replacement will not address the factors that contributed to the failure. It is important to note that a combination of factors often causes premature bearing failure. Incorrect bearing clearance is a common cause. As a result, if the underlying cause is not identified, a bearing loss can occur again. So, compare your old bearings to the ones in the pictures using the links above. As a result, that information may point you in the direction of why the original bearings failed. The data will help you understand the engine-bearing manufacturing process and its functions.