ACL Main Bearing Duraglide 0.25mm Oversized Set, #3 Thrust Bearing Position WRX 2002-2014 / STI 2004-2021 Subaru Turbo Models | 5M8297A-.25

ACL's main bearings are crafted from a softer metal, which helps protect your crank and engine block from wear. A thin oil layer lubricates the connection between the bearings and the crank, enabling the crank to 'float' and significantly reduce wear. Proper support from these main bearings is essential to prevent oscillations and wear that can harm the crankshaft and other components as the engine becomes unbalanced. Bearings with extra oil clearance can handle the stress of high - horsepower motors better, but they may experience more wear during startup. We suggest that only experienced professionals purchase these bearings. When buying, note that Subaru main bearings are specific to either a #5 or #3 journal bearing position. This position isn't determined by VIN or year, so you must know it before buying. Engine internals like these bearings can't be exchanged or returned, so make sure you're getting the right ones.

Using these ACL main bearings is straightforward. First, ensure you've correctly identified the #3 journal bearing position for your Subaru turbo model. Once you've confirmed that, you can install the bearings in your engine. During startup, be aware that these bearings with extra oil clearance might experience a bit more wear. As such, it's a good idea to give the engine a gentle warm - up. For maintenance, regularly check the oil level and quality. Clean oil is crucial to keep the thin lubricating layer between the bearings and the crank working effectively. If you notice any strange noises or performance issues, it could be a sign that the bearings need to be inspected. Remember, since these are engine internals, only experienced professionals should handle the purchase and installation to avoid any problems.