BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)


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      07-07-2017, 12:47 PM   #1
Second Lieutenant
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Drives: 2011 E92 M3; 2012 E88 135i
Join Date: Aug 2015
Location: Sydney

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Rattle/tapping at 1800-2000 rpm

Hi guys

I'm new to 135i N55's so wanted to get some advice on some rattle i'm getting from my 2012 135i N55 completely stock with 35,000miles...

The rattle sound only happens under light load between 1800-2000 rpm and stops after 2000 rpm or does not exist below around 1800 rpm... it's very subtle... this rattle sound is not noisy but definitely noticeable... bit concerned this will lead to something bigger...

Any advice on what might be causing this rattle sound would be much appreciated. Just to add there is no change in performance when this sound occurs... engine performance is normal... just want to figure out if this sound is normal for N55 engines ..

[2011 E92 M3 Jerez Black]
evolve stage II | alpine dct & mdm | track pipes | akrapovic titanium | rays forged G25 | vorsteiner gts-v front lip | metak rear diffuser | awron gauge
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      07-07-2017, 03:44 PM   #2
Ric in RVA
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Drives: '11 BSM 135i M-Sport
Join Date: Oct 2015
Location: Richmond VA

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Does it do it at those RPMS while stopped and in neutral?

If not it is likely drivetrain.

Manual or guess is manual.

If manual does it do it coasting if you put the clutch in?

If DCT I got no idea....
Ric in RVA
10 3.0 X5 N52, 10 Land Rover LR4, 83 R80, 90 325is M50, 02 Mini Cooper S, 95 Jaguar XJ6
currently e82 less. Seeking 128 i m-sport manual coupe
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      07-07-2017, 04:24 PM   #3
European Editor
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Drives: N54 e82
Join Date: Feb 2010
Location: Bayern, Germany

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Make a video for us interweb experts.

Could just be the normal sound of direct injectors. Or it could be the wastegate rattle - requiring new turbos. Could be the dual mass flywheel on a manual car rev'd in neutral too. Could be lots of things. Make a video for us.
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