[quote author=raitchison link=topic=3597.msg3794838#msg3794838 date=1284347547]
[quote author=SpikeddemZoomZoom link=topic=3597.msg3794090#msg3794090 date=1284256516]
Did my first oil change today on my recently purchased 2007 mazda 3i touring. One thing that I'd like to point out in case anybody else has issues. Perhaps this is just something the dealer did to the car, since the previous owner took it to the dealership for oil changes.
My biggest difficulty with the process was removing the undercarriage cover. It would have been easy, except for the three bolts in the front. They spun and spun and spun and spun. I figured they were stripped, and wasn't too happy. I took off all the other ones that I could. After a bit of fiddling around, I accidentally pulled the back half (towards the rear of the car) of the plastic down. Since the only bolts keeping it on were the three in the front, I could see the nuts for the bolts that seemed stripped. They looked super rusted. I took a 10 mm wrench to keep them in place while I used my 10 mm socket to remove the bolts. After removing the cover, I examined the nuts. Apparently, they're attached to a clip. The same clip/nut setup was on most of the back bolts, but after either tightening or loosening, those nuts would grab onto the clips and not spin. With the front ones, the nut did not grab, so that is why the bolt just spun. [/quote]
That means that someone overtightened those bolts by quite a bit, my car is 6.5 years old with 20 oil changes done on it (all by me) and I don't have that problem.
I think you have to replace the nuts so they properly lock onto the plastic.
In the spirit of being an American...I'll deal with it in 3,000 miles