Bill Foster and the vintage arm of the Delaware Valley BMWCCA club have raised the level of activity this year, and I managed to head down to a surprisingly good event at a local upholstery shop (see The Undiscovered Bounty). The 02 has been flawless as you know if you have been reading this blog, so this day turned out to be surprising. On the way down to the event, the exhaust sounded a little louder than normal at idle. It was ok at speed, so I just made a mental note. On the way back, there was rain, and it reminded me of how long it has been since the defroster was running. It threw up debris for a few minutes before settling down. The exhaust was a little louder still and lasted up to about 2000 RPM. This will need to be investigated….