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Q: I have a 2004 Ford Explorer V6 that has 93,000 miles. on 2004 Ford Explorer

On 12/31/11 the "service engine soon" light illuminated and there was a strange noise and some shaking so I did not drive the vehicle. I took it into the Ford dealership today and was told that there is a problem with the internal timing chain, and that they do not change that part because the engine would have to be removed, and that there could be other issues. He told me that another body shop could charge two or three thousand dollars because of the labor. He stated that their policy now is to get a new engine. I am in shock? Does this sound legitimate? What do you think it would cost? Help!!
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Only other advice I have is it could be the transfer case and differential. Jack up the car fully off the ground and put into gear and see if the driveshaft bucks like crazy where it enters the transfer case. Then that is the issue.
I'm guesing it is a 4.0 Over Head Cam engine. It is a common problem with that engine. The dealer is corect, unfortunately.
Has alot to do with the type of oil you use in the truck. The timing chain on the driver side head is easy enough to get to. On the passenger head the timing chain is behind the head, hence acessible only with engine removed.
The eight digit in the vin would help to identify what engine you have.
Sorry, good luck
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