HI there,
Thank you for the donation,
I think that this thermostat has been sitting under the bonnet for some time and has dislodged and you have just found it, short of smashing the thermostat housing off the engine and loosing all the coolant, this has not come from your engine as a result of the crash, throw it in the bin, check your coolant and if all is ok, and I am sure it will be don't worry about it.
Mark (mhpautos)
Friday, July 16th, 2010 AT 9:55 PM