2008 Chrysler Aspen

Engine Cooling problem
2008 Chrysler Aspen 6 cyl Two Wheel Drive Automatic 81,000 miles

I have a 2008 Chrysler Aspen. I got into an accident August 18, 2010. I called in the claim but continued to drive my truck until September when it ran hot. I took it to the shop and they told me that the problem was the water pump and the radiator. The shop made me pay for this out of pocket because they said it did not come from the accident. Then I got my truck on Thursday October 14. They informed me that the problem was fixed and that it might not be the heads because it wasn't running hot anymore. Today October 20 it ran hot again. The shop told me it could be the heads or a blockage. I do not know what to do. Please help.
October 20, 2010.

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