Besides doing these tire changes, and refueling, and changing broken parts if needed, what does the pit crew do off-race?

If you mean when they aren't racing, in F1 they completely dis-assemble the car bolt by bolt and check every piece for micro cracks and wear, rebuild the engine and transaxle, replace any worn part, and basically rebuild the car from scratch...almost every time. They also do experimentation with new parts and designs to see if they are worth integrating into the car. With the stresses these parts see in F1 racing, they have to be insanely careful to not put a cracked or poorly made part on, it could easily kill someone if anything fails.
Most of what wins races happens OFF the race course. I was an off road/desert racer, and it was even truer there. Just finishing in off road racing is a victory, and it's mostly due to proper preparation of the car. Being a lone wolf 'team' (meaning I had no pit crew, it was all on me and whatever 'friend' I could rope into helping at the race) it was pretty self gratifying when I was able to drive into the pits at the end of a race (as opposed to being towed or dragged in).

That's precisely what I meant. Thank you

anytime

no high fives afterwards?

this is actually one of the things I like about NASCAR over F1. You cant have a hundred people out on the track during the pit. There are only 6 that can cross the wall. To me, that's is much more skillful than this.

I think they're equally skillful, just in different ways. I don't much care for NASCAR, but I do know there's just as much sweat and skill in the top tier of stock car racing as there is in F1.

You beat me to it.
Also, they have to jack the car up, change 20 lug nuts instead of 4, fill the gas tank with a can, clean the windshield, clear the radiator intake, and make all adjustments.

This? 12 guys to change the tires. 3 with jacks (one backup?) 4 to walk up and hold the car (2 front, 2 middle.) And 2 guys who stand around and watch.

He even got time to shave his beard, respect!

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Promoting this video back to the front page; last published Tuesday, February 25th, 2014 9:16am PST - promote requested by kulpims.

Wow! That was a quick one!
Looks like there is no refueling going on though.
Seemed like "just" a fast tire change, maybe due to a change in weather.
Usually all planned stops are used to refuel as well.

If I recall it correctly one of those pressurized fuel hoses in the F1 pumps fuel at 16 litres a second (thats 4.2 Gallons for you imperial folks)

Since 2010(?), there has been no refueling allowed in F1. They have to finish on what they start with.

Haha! Really??? I was not aware of that!

All of my out of date F1 knowledge is from the days that Michael Schumacher was still driving for Team Benetton...

F1 Pit Stop Explained has been added as a related post - related requested by oritteropo on that post.