ACL Main Bearing Duraglide Standard Size Set, #3 Thrust Bearing Position WRX 2002-2014 / STI 2004-2021 Subaru Turbo Models | 5M8297A-STD

ACL's main bearings are crafted from a softer metal, protecting your crank and engine block from wear. A thin oil layer lubricates the bearings and the crank, enabling the crank to 'float' and minimize wear. Proper support from these bearings is vital to prevent oscillations and damage to the crankshaft and other components when the engine gets out of balance. Bearings with extra oil clearance can handle the stress of high - horsepower motors better, but they'll experience more wear during startup. We suggest these be bought only by experienced pros. Remember, Subaru main bearings are specific to either #5 or #3 journal bearing positions. This position isn't related to VIN or year, and you must know it before buying. Engine internals aren't eligible for exchange or return, so be sure of your needs.

Using these ACL main bearings is straightforward. First, make sure you've correctly identified the #5 or #3 journal bearing position for your Subaru engine before installation. Once you've got the right bearings, carefully install them in your engine. When starting up, keep in mind that if you've chosen bearings with extra oil clearance, they might experience more wear initially. As for maintenance, regularly check the oil level and quality. The thin oil layer on the bearings is crucial for reducing wear, so clean oil is a must. If you notice any unusual noises or vibrations from your engine, it could be a sign that the bearings need inspection. Only experienced professionals should purchase and work with bearings that have extra oil clearance due to their unique wear characteristics during startup.