1998 Infiniti I30 6 cyl Front Wheel Drive Automatic 105000 miles
I have noticed noise that occurs at 70 mph and gets worse the faster I go. It seems to be in the engine. Runs great when stationary. Doesn't smoke and gets great gas mileage. The noise sounds like something rattling or bouncing around in the engine. I took it to a dealer and they couldn't hear it. When I picked it up I couldn't hear then either but now I hear it again. I am wondering if cold weather makes a difference.I, e I tend to hear it more when it is cold. I have noticed soot above the catalytic convertor area going all the way across engine where the dipstick is at (crankcase?). Do you think this is the CC going out? Should it go out on a 10 year old infiniti? What should I have checked to see if that is the problem and what else should I have check to see what may have caused it to go out?
Saturday, March 7th, 2009 AT 2:29 PM