Subaru WRX Pistons, Rings & Connecting Rods

The Subaru WRX is a capable performance machine with rally-proven all-wheel drive and a unique flat-4 engine. Although, time and miles take their toll, with some of the auto’s components and systems wearing out and needing replacement. There are a few trouble spots in WRX engines too, with one of them being piston ringlands. They can fail due to high pressure and heat causing them to fracture. This can happen due to putting the engine under high load, engine mods with the pistons left stock, and an improperly designed crankcase breather setup, among other things.

There are many signs which can inform you of the pistons, rings, and conrods wearing out and nearing the finish line of their service life. First, your pistons may develop piston slap, which may result in the parts getting cracked later on. If the piston noises do not subside once the engine is brought up to operating temperatures, then the pistons are too worn out. Second, if the piston rings are already past their prime, you may notice plenty of gray or white smoke in the exhaust, too much oil consumption, considerable power losses, and lower acceleration. Third, if the conrods are faulty, you may hear knocking coming from the engine, lowering oil pressures, and of course, too much oil consumption. Replacing your Subaru WRX pistons, rings & connecting rods is a job which should be left to a professional mechanic, with our store being a reliable supplier of the necessary hardware.