2011 Mustang 5.0L Knocking On Cold Start/Drive
At about 1000 miles, my Coyote developed a top end knock at almost coast in gear within the first 5-7 minutes of driving. It sounds exactly like a loose valvetrain. The car now has 1600miles on it and I finally dropped it off at the dealership for repair. I figured I would begin a thread to follow this issue through to the end for anyone else that may experience this issue.
2011 Mustang GT 5.0L Base
6 speed MT82
Special ordered the car from the factory but somehow it arrived with 47miles on it. I hit the pedal two or three times to seat the rings and then during the course of the next 700miles, the engine rarely saw over 3500rpms. I basically maw-mawed the car around. At around 750miles, I took it out for a drive and finally got on it, just punching it from about a 30mph roll and running through 4th. I did this about two or three times to test the brakes and then just carried on my normal driving style. At ~1000miles, the engine began making a light knocking noise under the conditions listed above. It progressively got worse up to 1600. After the car warms up, it would subside. So here is what I have so far:
I dropped the car off at the dealer Monday after not driving it all weekend. It was about 50 degrees in my garage and 35 degrees outside. The engine made a racket for the first couple of minutes of driving (under the same scenarios as listed previously). The dealer called me and asked me to come down that afternoon and ride with the service manager so they could verify that they were hearing the same sound as me. We weren't even across the parking lot and he heard it, but we took a ride down the road and it really made noise. So he suggested, we drive another 5.0 they had on the lot to see if it makes the same noise. This California Special, that he was driving for a month, had 660 miles on it. We took it down the road and as soon as I got to about 3rd gear, you were able to faintly hear the noise in this engine as well. I told him that that is how mine started. He was very concerned at this point and we went in the office to talk it over. I told him my thoughts on what it sounds like and he explained that FMC told him that since this is a "virgin" (meaning the motor), that they wanted an engineer to come down and check it out. They didn't want the dealer tearing into it yet. So, they told me an engineer was scheduled to be there in the next day or so, and they would get back to me shortly. He sounded very concerned for the issue especially since Ford Customer Support was on the case. He said that when they get involved, they dont mess around. So about 1.5 hours after the visit, Ford Motor Company Customer Care called me and gave me an update that they had contacted the dealer for an update. They explained the process and said they would contact me again by Thursday, unless they had an explanation before.
As far as I am concerned, it sucks that I only got 3 weeks of easy driving and only a few romps on the pedal before this happened, but it appears that Ford is genuinely interested in making this right. We will see what happens........