Homer_Bart
Well-Known Member
Hi guys. It's a really stupid title name but I don't know what will be more apt since my mechanical knowledge is extremely limited.
So "my" BMW 320i E90, built 2007 and currently with 90000km, has been having problem with noises and engine lately.
First, the engine of late has been running much louder than before, it used to hum quietly but now it drones loudly, and the noise difference is especially apparent when heard outside the car.
Secondly, the car's acceleration sometimes feels jerky. I depress the gas pedal a little, there'd be minimal gain in speed for a fraction of a second or sometimes longer, and then the car jerks forward. When it happens on a "cold" morning of 28 degrees, I understand, but sometimes it just happens on a hot day of 37 degrees and the engine is very or extremely warm.
Thirdly, the engine makes rattly noises. When in Drive at higher revs and the aircon off, the car sounds fine. But with the aircon on in drive but in idle or lower revs, the noise is rather alarming. In Park, the rattly noise isn't there, either with the aircon on or off.
What's the problem here? Is it the timing belt?
Thanks!
So "my" BMW 320i E90, built 2007 and currently with 90000km, has been having problem with noises and engine lately.
First, the engine of late has been running much louder than before, it used to hum quietly but now it drones loudly, and the noise difference is especially apparent when heard outside the car.
Secondly, the car's acceleration sometimes feels jerky. I depress the gas pedal a little, there'd be minimal gain in speed for a fraction of a second or sometimes longer, and then the car jerks forward. When it happens on a "cold" morning of 28 degrees, I understand, but sometimes it just happens on a hot day of 37 degrees and the engine is very or extremely warm.
Thirdly, the engine makes rattly noises. When in Drive at higher revs and the aircon off, the car sounds fine. But with the aircon on in drive but in idle or lower revs, the noise is rather alarming. In Park, the rattly noise isn't there, either with the aircon on or off.
What's the problem here? Is it the timing belt?
Thanks!
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