I have a 325e it runs fine it just makes a knocking noise from right about 1k rpm's and goes away by 2. This happens in neutral, while not moving also, so i know its not part of the drive train or anything. Could the valve's just need to be adjusted? It's more of a thud than a tick. No smoke, leaks a little oil. Somebody please help, I dunno if it's good to be driving the car like this...
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low engine rpm knocking?
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It could be a sympathetic vibration from a loose accessory or bracket somewhere. That would make sense given your symptoms. Pop the hood, lean over the engine and open the throttle until you hear the knock. The source should become obvious.
Rod knock is usually always audible. It just gets louder the higher you rev.971-295-7077
91' 318i
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I need to do this with my car. I get what sounds like a rod knock ever time I turn it off. But never anytime else. that little time between 600-0 rpm I hear about 5, maybe 6 knocks.
And I've never heard of "Sympathetic vibration" being used in place of resonant frequency. But I kind of like it. Dunno why, just do.
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Me?
IF me, It doesn't diesel. It just makes it as the noise as the rotating assembly comes to a stop. If I could place it accurately (Which I can't), I would say between the 200-0 rpm. Never right when I shut if off. But that second half of the 3/4 of a second it takes to go from idle to 0.
Honestly, now that I think about it. It very well could be my exhaust tapping the body of the car. It's REALLY close to the framerail. It didn't do it when it was an auto, but it has been a manual for 8 months, so my motor mounts are probably on their last legs.
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Originally posted by trevor144 View PostNo my problem has nothing to do with the clutch, it makes the noise in neutral as well as under load.e92 M3
e30 M3 s52 swap
w203 C240 wagon (DD)
190e 5.6 swap (in surgery)
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piston slap? is it worse when the motor is cold?'84 318i M10B18 147- Safari Beige
NA: 93whp/90ftlbs, MS2E w/ LC, 2-Step
Turbo: 221whp/214ftlbs, MS3x flex @ 17psi
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Originally posted by TurboJake View PostMe?
IF me, It doesn't diesel. It just makes it as the noise as the rotating assembly comes to a stop. If I could place it accurately (Which I can't), I would say between the 200-0 rpm. Never right when I shut if off. But that second half of the 3/4 of a second it takes to go from idle to 0.
Honestly, now that I think about it. It very well could be my exhaust tapping the body of the car. It's REALLY close to the framerail. It didn't do it when it was an auto, but it has been a manual for 8 months, so my motor mounts are probably on their last legs.
my Eta has done EXACTLY what you are describing ever since i made it a manual. my motor mounts are totally shot now too...
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