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it depends on what kind of loud noise, a knocking noise, a grinding noise, a chatter. if you can tell me what kind of noise i can help

if your car is a manual transmisison and the noise you are talking about is a "growl" when under load then it is most likely worn bearings on the input shaft to the transmision.

Well if the loud noise in only during acceleration, and has no noticeable effect on the cars driving, then it is most likely a hole in your exhaust. I have a 91 325ic and It had a loud accelerating noise, but when i plugged the hole and the harsh noise ceased. There are plenty of ways to plug holes for free just find one and try it and if it works..great!

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โˆ™ 2007-12-10 23:03:31
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Q: What will cause your 1991 325ic BMW to make loud acceleration noises?
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