When you consent to have your vehicle searched for stolen property, do the same rules and guidelines of a warrant apply?
If you give a police officer consent to search your vehicle, they are free to search it as much as they want. You have the right to revoke your consent while they are actually searching, but you cannot assert an unlawful search later on if you were the one who gave consent.
Your underlying question: Can they search with a fine tooth comb if you gave them consent? Answer: Yes.