most car dealers have like a 90 day warranty so see whats covered under warranty and read the print on ya sales papers. i know you know, but you really should get a full inspection done on the car before you buy. and dont accept an inspection by someone who the dealer recommends... there vampires!!
i was looking at a line from a dealer and told him i was interested and said id like to get it inspected by RACV (their policy is to take all imports to a workshop, and do a full check. no on the spot job. bit of stuffing around.. but piece of mind), which i would 100% pay for ect.. and the dealer said no. haha i was like, hang on, im willing to buy a car from you and you wont let me get it checked by someone who i want to get it check, he said he would get it checked by the dealerships mechanic and provide me with a report. i laughed at him and of course told him to f**k off.. anyway long story short, people are dodgy.
good luck with the issue, and keep us posted as to what happens to you godz