We all looked at each other and another customer asked, 'What is a seven-hundred-and-ten?' She replied, 'You know, the little piece in the middle of the engine, I lost it and need a new one ...'
She replied that she did not know exactly what it was, but it had always been there.
The mechanic gave her a piece of paper and a pen and asked her to draw what the piece looked like.
She drew a circle and in the middle of it wrote 710. He then took her over to a car just like hers which had its hood up and asked 'is there a 710 on this car?'
'Yes of course, its right there,' and pointed it out.
If you're not sure what a 710 is ...