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      11-17-2019, 01:50 PM   #3
smartbear
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Drives: facelift z4
Join Date: Feb 2014
Location: chelmsford

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Quote:
Originally Posted by mad1stgen View Post
Waste gate startup rattle. Normal N20 sound.
Hi, it’s not wastegate rattle (that seems to effect the twin turbo 3litre engines, not the 4 pots)
It’s emissions related, that’s why it goes away as the engine warms up
Rob
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