This week's Car Talk kicks off with one listener's brilliant (and only sorta wacko) theory: a non-essential repair on an old car creates a parallel universe in which everything else starts to break. Then it's off to New Mexico, where Nolina has two choices for dealing with a disintegrating head gasket: a $2500 engine re-build, or a $10 can of Bar's Leaks. Any bets on which side Tom and Ray come down on? Elsewhere, Michael in New Jersey needs to replace his beloved minivan with something that can accommodate his Daniel Pinkwater-ish body and his very picky teenage daughter; Brian's looking for a way to convince Little League parents to stop parking in his driveway that doesn't involve slashing tires; and on Stump the Chumps, does Tom manage to snatch defeat from the jaws of a Ray victory? All this, and lots more, this week on Car Talk.