When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Was out with my C63S the other day doing a few high speed/throttle runs and when I got home noticed that there was more soot on the decorative chrome tips on the passenger side. I thought that the disconnected tips didn't get it, but is it just reduced?
Vehicle is at 1600 miles and stock except for the ASR module keeping exhaust valves open. Not major, but definitely there. Soot on passenger exhaust tips Minimal soot on drivers side exhaust tips
Did you properly observe a run-in period for the engine or did you "drive it like you stole it" from day 1?
My informal survey, over the years, leads me to believe that excessive exhaust-tip soot is likely due to increased piston-ring blow-by which is often caused by engines not being broken-in properly. Just a theory, but also seems to track with the amount of oil an engine uses between oil changes. The other reason would be overly rich fuel/air mixture, but that's about impossible in a properly operating, computer controlled engine.
Did you properly observe a run-in period for the engine or did you "drive it like you stole it" from day 1?
My informal survey, over the years, leads me to believe that excessive exhaust-tip soot is likely due to increased piston-ring blow-by which is often caused by engines not being broken-in properly. Just a theory, but also seems to track with the amount of oil an engine uses between oil changes. The other reason would be overly rich fuel/air mixture, but that's about impossible in a properly operating, computer controlled engine.
I agree with the above. Are you tuned or catless DPs? If so, running rich or unburnt fuel could cause this. If no to either, how is your engine’s oil consumption?
No soot on mine even after Catted DP’s. I broke mine in somewhat hard. Soot is not necessarily a bad thing, my M5, and Giulia QV had crazy amount of soot. I believe it’s due to car running rich.
No, I broke it in very slowly. Kept it below 3k RPM religiously until 1k miles, from November to late March. Yes, not much chance to drive it much in winter.
i would not be worried about the soot since the W204 C63 had it a lot (secondary cats removed only). onljust assumed that with the disconnected tips that the soot was gone and tips stay pristine. Plus, itnis one side. When the turbos were going on my 335 years ago, more soot out the exhaust was the symptom
Yeah, that will happen. A little chrome polish clears that right up.
So my question is if this is normal, or abnormal? I can handle cleaning the tailpipes if this is expected from normal operation.
I have catted DP in hand to install, and am considering bringing the car to the dealer so they can document that this is happening before I do DP (with my previous vehicles they were good about covering an issue if it popped up while I was in warranty)
My car has soot for days. Every time I drive it my rear diffuser looks like someone did a light coat of black spray paint over it. For me it's normal because i'm running a burble tune and I am catless.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
