This week on The Best of Car Talk, Heidi’s husband is a tennis pro, with a limited grasp of English, and an aversion to reading instructions. So he should have no problem changing her Volvo’s timing belt, right? Elsewhere, Nathan dinged his girlfriend’s Civic while driving it without her permission (or a license). Can Tom and Ray help him cover up his crime, at least until she hears the show? Also, June agreed to teach her friend’s teenaged son to drive, but has no idea where to begin; Andrew's Toyota has a bad case of crud accretion in the radiator; and over in Botswana, Dorothy’s baboon behavior studies are on track thanks to a piece of wire keeping her Land Rover’s fan from destroying the radiator. Is there a more permanent solution, other than Dorothy relying on Jane Goodall’s Greatest Hits video for her studies? All this and more, this week on The Best of Car Talk.