When the weather is really cold (like it has been today and yesterday here in St. Louis), I've noticed a very fast tick coming from my engine. It's most noticable for the first half hour or so the car is driven, then it fades somewhat, but is still there. I mentioned this problem to my dealer about a month ago, but they couldn't find anything wrong. They did a valve adjustment, and said that should cure it. It didn't. A second dealer wasn't able to fix it, either. The sound is noticable even if I walk several paces away from the car. The noise goes away when the temperature is higher outside (40+ degrees).
I popped the hood tonight--the sound seems to be coming from the driver's side area of the engine. I noticed two things over there--what looks like the EGR valve and the PCV valve. The larger of the two, which I think is the EGR valve, had a Siemens label on it. The ticking sound seemed strongest here---is it possible that the noise is coming from a valve or solenoid in this area? Are there any known problems with any of this stuff? Or is it more likely that there's something mechanically wrong with the engine? I'd appreciate any information anybody can offer--it doesn't seem like these dealerships know what is wrong, and they don't seem remotely interested in trying to figure it out, either.
I popped the hood tonight--the sound seems to be coming from the driver's side area of the engine. I noticed two things over there--what looks like the EGR valve and the PCV valve. The larger of the two, which I think is the EGR valve, had a Siemens label on it. The ticking sound seemed strongest here---is it possible that the noise is coming from a valve or solenoid in this area? Are there any known problems with any of this stuff? Or is it more likely that there's something mechanically wrong with the engine? I'd appreciate any information anybody can offer--it doesn't seem like these dealerships know what is wrong, and they don't seem remotely interested in trying to figure it out, either.