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I had a handful of 2000's era 9-5 2.3T engines with both transmission and thought the iron was block was coarse but not annoying sounding. The 2013. Buick Encore also had a iron block 1.4T that until I opened the window an inch or so could never hear with the ANC(active noise cancelation) always canceled the sound out.
The aluminum Ecotec 2.0T continues with ANC but the idling while in park shake from 2.3T is mostly gone in the 2.0T.
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