So a while back I had posted about a check engine light that came on after I picked my car ('09, 76500 miles) up from a recall services (airbag, computer update). Car would shudder and the light would turn on, then would go away by the next day.
Took it in to the dealer, got it scanned. Dealer said cylinder 3 was misfiring, that they moved around the coils, and sent me on my way without charging me a dime.
Fast forward a month, and it happened again. This time, the service rep says that coolant is leaking in, touching the top of the cylinders, and “detonating” (didn’t think engine coolant was flammable). Said the possible cause could be up to a head gasket leak. So far it’s up to $270 for the code scan and compression test, but more tests could be required. So here are my questions: The car’s worth about $6000 according to KBB, choosing the lowest rating, and a head gasket job would cost over $2K. At what point do I cut my losses and sell or trade it in (if a dealership would accept a car with a possible head gasket failure)? What else could it be? How much would I expect to get back in sale value to get some of the other issues fixed (coolant pump could be going bad, broken window clips on one door)?