If you bought a used car "as is' from a private party and you can prove that the private party did not disclose all known problems with the vehicle before you bought it to you, you would have a basis for bringing an action for concealment. The measure of your damages would be the tow charges and the costs of repair.I suggest that the mechanic who has fixed the vehicle be consulted as a possible expert witness as to its problems and possible knowledge of the problems by the seller.