QUESTION: I just bought a car from a private party for my daughter to take away to college out of state. It’s a 2002 Ford Taurus, which appears to be well taken care of and in pretty good shape. I am concerned about a hot odor from under the hood and want to be sure everything’s OK before she heads out with the car. Can you give me some ideas what the odor could be and how it can be reliably fixed?

—Cindy T.

ANSWER: Cindy, the right way to do this is to get the car into a shop for a full-vehicle inspection. You’ll want to know of any troublesome issues in all vehicle systems and get a specific check of the hot odor symptom. Most repair shops offer such an inspection service, hopefully similar in thoroughness to the AAA gold standard. Some identified faults may require immediate service, while others can be noted and checked again at a later date.

What follows is not meant to be a substitution for the inspection, but some possible hot odor causes a competent technician would look for.

The odor is likely the result of leaking fluid in contact with a hot surface. Possible causes could be engine, power steering, or transmission fluids seeping or leaking, and coming into contact with the exhaust system. A seeping valve cover, for example, allows motor oil to ooze downward and cook on the exhaust manifold, which is fairly easy to see and correct. Other seals, gaskets or hoses may leak, ending up upon the exhaust pipe further beneath the engine, which is more difficult to identify and repair. Leaking engine coolant can result in a sweet, citrus or steamy odor regardless of where it ends up.

The word "hot" gets my head-gears spinning as overheating is the No. 1 cause of vehicle breakdown. Thoughts of leaky hoses, an inoperative cooling fan, rusty coolant, a growling water pump and, I hesitate to say, a failed head gasket come to mind. When it comes to kids out alone on the highway, I’d want bulletproof confirmation that the cooling system is good to go. I’d verify, using a scan tool for accuracy, engine and transmission temperature under a variety of operating conditions. Possible causes of high engine temperature include a deficient radiator, which could be clogged internally or externally; a missing air deflector; inoperative or lazy cooling fan; low coolant level caused by leakage; an eroded water pump impeller; or collapsing lower radiator hose, among others.

A thorough cooling system inspection should identify any leakage or other problems, and several cooling fan cycles should also be verified. If there were any signs of previous engine overheating, or clues that might lead to this, I’d perform a head gasket check — a carbon monoxide test of cooling system vapors with the radiator cap removed. If the engine coolant does not appear fairly fresh, I’d have it renewed, along with belts and hoses that show any age.

Your hot odor may turn out to be a simple fix. I don’t mean to spook you; I’m thinking of how unpleasant it can be to solve problems far from home. If you have the time to get the Taurus up to top shape before she leaves for school, you’ll certainly sleep a lot better.