Jay Leno with a 1925 Ford Model T Roadster from his extensive collection of vehicles.

BURBANK, Calif. -- Contrary to common knowledge, Jay Leno does have children. Scores of them. And right now, one is sick.

"Sounds like she's not hitting on the third cylinder," he says with concern as men with thick forearms and grease-stained hands huddle around a diminutive 1965 Honda S600 convertible. "Probably carburetion, not ignition."

So begins another day at Leno's garage, a retreat where Tonight Show concerns vanish in the face of a hobby guided by encyclopedic knowledge and fueled by childhood passion. Actually, "garage" is too quaint a word for the trio of airplane hangars that house the comedian's ever-expanding family of (vehicles), according to USA Today.