The way to Identify the Cause of a Grinding Noise in a Automobile 1Start the car. If the grinding noise starts instantly or is present anytime the engine is running, pop the hood.In the event the grinding hasn’t started yet, skip to step three.2Open the hood. If you can’t identify the alternator, water pump and power steering pump, refer to your car’s owner's manual until you know what’s what. Take a piece of hose and put one end up to your ear.
Point the other end at the alternator, then at the water pump, and finally at the power steering pump to see if you can pinpoint the source of the noise. If any one of these three is the culprit, that part will likely need repair or replacement.3Start driving. Listen carefully when you touch the brakes. When the grinding occurs when you brake lightly and worsens when you brake harder Obd2 scanner, you may have worn brake pads. This is easy to confirm; simply look at the brake pads to see how much thickness is left. If you’re down to within the last quarter inch, it’s about time for a replacement. If you’re not sure what the brake pad looks like, again, consult your owner’s manual.
4Continue driving in the event the brakes are not the source of the noise. Make both a ideal turn and a left turn. If you hear the noise only when making one of these turns or the noise worsens when you make a turn, the problem is likely to be a wheel bearing. If turning one direction makes the noise louder and turning the other direction makes it quieter or makes it go away entirely, it is almost certainly a wheel bearing. This is a huge safety issue which must be dealt with immediately by a professional mechanic.5Take the car or truck to a mechanic if you do not have the skills or tools to repair the vehicle yourself Auto code scanner, or if you cannot pinpoint the source of the grinding noise. Look for a mechanic that will apply your diagnostic fee to your repairs to get a good deal.
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