Drives: 2011 BMW 328i Sport 6MT Join Date: May 2016 Location: Reseda, CA iTrader: (0) How A Belt Tensioner Turned Into $1600 And Change. Let me preface this by saying that I love my E90 330i, and for my last two years of ownership, the car has been exceedingly reliable. For ...
When knock occurs, you get a partial burn of the fuel air mix, or it happens over a longer duration and the flame front that should be cleanly pushing the piston down, is effectively swirling around, losing you power and often putting unburnt fuel through your catalyst which will definitely...