Working Under Car - BMW 5251 Service Manual

(General
WARNING-
Do not rely on the transmission or the parking brake to
keep the car from rolling. They are not
a
substitute forpos-
itively bloclcing the opposite wheel.
Never work undera car that is supported only by a jaclc.
Use jack stands designed to support the car. See
Tools.
Working
under
car
-
Disconnect negative (-) cable from battery so that car cannot
be started. Let others know what you will be doing.
CAUTION--
Prior to disconnecting the battery, read the battery discon-
nection cautions given in 001 General Cautions and
Warnings.
-
Raise car slowly as described above.
-
Use at least two jack stands to support car. Use jack stands
designed for the purpose of supporting a car. See Tools.
WARNING-
* A jaclc is a temporary lifting device and should not be used
alone to support the car while you are under it.
Do not use wood, concrete blocks, or bricks to support
a ca,: Wood may split Blocks and bricks, while strong,
are not designed for that kind of load, and may break or
-
Place jaclc stands on firm, solid surface. If necessary, use a
flat board or similar solid object to provide a firm footing.
-
Lower car slowly until its weight is fully supported by jack
stands. Watch to make sure that the jack stands do not tip or
lean as the car settles on them.
-
Observe all jacking precautions again when raising car to re-
move jack stands.