ACL Main Bearing High Performance 0.025mm Oversized Set, #3 Thrust Bearing Position WRX 2002-2014 / STI 2004-2021 Subaru Turbo Models | 5M8297HX-STD

ACL's main bearings are crafted from a softer metal, which safeguards your crank and engine block from excessive wear. A thin oil layer lubricates the bearings and the crank, enabling the crank to 'float' and minimize wear. Proper support from these main bearings is vital to prevent oscillations and wear that can harm the crankshaft and other parts when the engine goes out of balance. Bearings with extra oil clearance can handle the stress of high - horsepower motors better, but they experience more wear during startup. These are recommended for experienced professionals only. Remember, Subaru main bearings are specific to either #5 or #3 journal bearing positions. This position isn't related to VIN or year, so you must know it before buying. Engine internals aren't eligible for exchange or return, so make sure you pick the right bearings.

Using these ACL main bearings is straightforward. When installing, ensure you've correctly identified the #3 journal bearing position for your Subaru turbo model. It's crucial to have a thin layer of oil on the bearings to let the crank 'float' and reduce wear. As for startup, be aware that bearings with extra oil clearance might experience more wear, so take it easy during the initial start - up phase. Maintenance is simple. Regularly check the oil level and quality as the oil is key to the proper functioning of the bearings. If you notice any strange noises or vibrations, it could be a sign of bearing wear. Since these are for high - performance engines, it's best to have experienced professionals handle the installation and maintenance. And always double - check the bearing position before purchasing to avoid any exchange or return issues.