9/1/2023 0 Comments Subaru wrx knoig![]() There are only a few issues that can cause a rod to start knocking. If the noise only seems to occur when your engine is cold, it’s probably piston slap or an exhaust leak. Those shavings are tiny pieces of the rod bearings that have disintegrated. With a rod knock, if you drain your oil you should notice metal shavings. The knocking sound is usually the worst at idle, or when backing down off of the gas. Almost like someone is beating your WRX’s engine with a hammer. The knocking will sound very metal on metal. ![]() If the knocking sound changes with the vehicle speed, you may have a bad axle shaft or suspension problem. If it is the rod that’s making the sound, it must directly correspond with the engine RPM. The most obvious sign of a rod knock is the knocking noise itself. The rod can eject itself from the engine, ruining it and leaving you in need of a new engine Once it starts, the bearing surface only wears down faster and eventually it will throw a rod. ![]() Your WRX’s engine will not survive long with it. ![]() If you do have a rod knock, don’t ignore it for too long. If your Subaru WRX has a knocking rod, it’s almost always going to be caused by a failure of the rod bearing or the rod caps (leading to a spun bearing) or lack of oil. ![]()
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