"homepc" <
wieb...@gmail.com> wrote in message
news:jolqta$m0e$1...@dont-email.me...
It's safe to use the jack that came with the car. Well, it's not all that
safe, but wear and tear on the jack isn't the issue. The issue is that the
car can move, and fall off of the jack.
Loosen the lugnuts on the tire of your desire. Just make them so they are
not at full torque, do not make them so loose that you can spin them off by
hand.
Raise the car.
Remove the lugnuts that you pre-loosened.
Change the tire. spin the lugnuts tight by hand. Set them as tight as you
can BY HAND. (the goal is to make the wheel fit the hub flatly and fully,
and not knock the car off of the jack.)
Lower the car.
Use your torque wrench to set the lugnuts to the correct torque. You gotta
look this up, but 75 ~ 80 pounds is the general ballpark of this sort of
thing.
Move to the next wheel and repeat.
When you are changing a tire on the side of the road, you should follow the
same process -- loosen the nuts, raise the car, remove the nuts, change the
tire, install the nuts by hand, lower the car, tighten the nuts to spec.
You can, and some will say you should, leave the weight of the car on the
jack, but lower the car until the tire touches the ground, when you torque
the nuts. If the tire is not fully against the hub, but the car is still on
the jack, then the torque process will pull the tire in. If the weight of
the car is on the tire AND the tire is not against the hub, you can reach
the torque setting of the wrench but the nut can still not be tight.