Part #: KIT - ENGBEAR - 1. When you're replacing rods and pistons, it's smart to swap out the rod bearings too. Main bearings play a vital role. They offer proper support, stopping oscillations and wear that could harm the crankshaft and other parts if the engine gets out of balance. ACL's high - quality rod bearings are built tough. Their durable design prevents fatigue and failure, and also cuts down on drivetrain stress. ACL's main bearings are crafted from a softer metal. This means your crank and engine block won't wear out easily. There's a thin oil layer between the bearings and the crank. It lets the crank 'float', reducing wear. Good support from main bearings is essential to avoid damage as the engine moves out of balance. Included in the kit: 1x ACL Subaru EJ20/EJ22/EJ25 (For Thrust in #5 Position) Standard Size High Performance Main Bearing Set P/N: 5M8309H - STD and 1x ACL Subaru EJ20/EJ22/EJ25 (Suites 52mm Journal Size) Standard Size High Performance Rod Bearing Set P/N: 4B8296H - STD. Fitment: 2002 - 2014 WRX and 2004 - 2021 STI. Note: Does not fit 2015+ Subaru WRX.
Using this engine bearing kit is straightforward. First, when you're in the process of replacing rods and pistons, it's the right time to put in these new bearings. Make sure to handle them gently as they're precision - made parts. When installing, double - check the fitment. This kit is for 2002 - 2014 WRX and 2004 - 2021 STI models, but it won't work on 2015+ Subaru WRX. For maintenance, keep an eye on the oil level. The thin layer of oil between the bearings and the crank is important for smooth operation. Regularly check for any signs of excessive wear or strange noises. If you notice anything unusual, it's a good idea to have a professional take a look. Remember, proper support from these bearings helps prevent engine damage, so taking good care of them is key to a long - lasting engine.
