Located at the crankshaft, the purpose of the flywheel is to balance the engine's vibration. On a manual transmission, it doubles as a balancing device for the clutch system and the engine. Meanwhile on an automatic transmission, it is attached to the torque converter. When the flywheel is loose, it can pose problems, which will affect the performance of the BMW 325i. Here are some tips to help you troubleshoot at home.
You should note that your BMW 325i will not start if the flywheel is loose. Start the engine and check if you can hear any clacking noises. The ignition engages the starter motor, which enables the flywheel to crank the engine. However, if the BMW 325i flywheel is loose, the gears would only be able to grab parts of the flywheel because they are not aligned. Hence, the car would not be able to start. If this happens, make sure that you check the flywheel if it's loose or if there are any missing gear teeth that must be replaced or repaired.
The engine normally vibrates from the combustion and presses down the crankshaft. The vibration is balanced by the flywheel. If this is loose, the engine could cause excessive vibration and can jeopardize the BMW 325i. It can even lead to damaging the transmission mounts, motor mounts, and other engine parts. You will later realize that steering would be difficult. If this is the case, it's an indication that the BMW 325i flywheel must be replaced with a new one. You would want to avoid driving with a loose one if you don't want further damage.
Step on the clutch and check if it slips. If this happens, it's also an indication the BMW 325i flywheel is loose. You also start hearing grinding noises whenever you shift gears. This happens whenever the clutch is not holding the transmission in a neutral position. If you don't replace the flywheel, it can cause the transmission to affect the internal gears and could cause the car to lose more gears. Make sure to check the flywheel if there are bolts that need to be tightened. Otherwise, it's best to have it replaced instead.