i have a 1994 bmw 318i and a few weeks ago it started making this high pitch squeeling sound. Only when the engine is running but it does it if im in park or driving. Its constant everytime i turn it on. My friend said he thinks its the pully probly the one by the alternator. My dad thinks its the water pump. I am not sure what it is but i need to fix it ASAP an order teh parts for it. so if anyone knows what the problem is or has had it before please help thanks
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