Question about 2008 Hyundai Sonata

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Grinding noise from belt area

Engine will not shut off when turning off the ignition key.

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  • Tony
    Tony Apr 18, 2014

    I took it to a mechanic and the darn thing would not make a noise for him. In addition to that, the engine turned off and on normally... What the heck, for now the car is running normal without noise or shut-off problems. But I am still leaning toward the clutch bearing for the A/C compressor, or a bearing on one of the other pulleys. Anyone have an idea what else may make a grinding noise and cause your hyundai to keep running when turning off the ignition key? ...and then act normal again temporarily in front of the mechanic?

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Could be the alternator going bad I only say that because there is a wire in the wiring system that is common to the ignition switch , the , alternator , and the transmission as well as the ECU, inhibitor switch, and the TCU. If the alt. bearing going out then I suppose it could cause a short and keep the circuit connected preventing it from shutting off. If you can't turn it off, try disconnecting the positive post of the battery, if it s the alt. was not putting out and I would check it then. At first I was going to say the ignition switch and the starter was staying engaged but you said it was coming from the belt area so that's why I'm leaning towards the alt. and not a tension or idler pulley . They going out would not keep the engine from stopping. If the engine did not stop when you disconnected the alt. then the priority at the moment is to stop the engine. You can do it by going to the panel that has the engine relay and fuses in it. Look to see which is the fuel relay and or fuse and pull it out. It may say fuel pump relay anything along those lines. this will shut your fuel pump off thus the engine will not continue to run and you can further investigate to see if the alt. is able to turn or if it's making a grinding noise when you turn it by hand. Of course you will have to take the belt loose to inspect this and while your at it you may as well check to make sure that none of the other pulleys or water pump is wearing/worn out also.

Posted on Apr 16, 2014

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