A woman calls an import parts warehouse and asks for a 28- ounce water pump.
"A what?" says the confused parts guy. "My husband left a note it says he needs a 28-ounce water pump."

"A 28-ounce water pump? What kind of car does it fit?" "A Datsun."

As the parts guy writes down "Datsun, 28 oz. water pump" a light in his head goes on. "Oh yes ma'am.
We've got 28-ounce water pumps. We have 24-ounce and 26-ounce water pumps too."

"Finally," she says. "You're the first place I've called that knew what I was talking about."

"Yes ma'am. That's because we're a full-service parts warehouse; it's our job to have the parts you need,
like a 28-ounce water pump," he says, smiling, as he jots down: Customer pick-up, Datsun 280Z water pump part number...

A while back I was having some work done at a local Ford Dealership. A guy came in and asked for a seven-hundred-ten.
We all looked at each other and then finally another customer asked, "What is a seven-hundred-ten?"
He replied, "You know, the little piece in the middle of the engine, I have lost it and need a new one."

He said that he did not know what it was, but this piece had always been there.
The parts guy gave him a piece of paper and a pen and asked him to draw what the piece looked like.
The customer drew a circle and in the middle of it wrote 710. He then took him over to another car,
which had its hood up and asked, "Is there a 710 on this car?"
He pointed and said, "Of course, it's right there."

See here to see what he pointed at...