Jack Stands; Oil Change Equipment - BMW 3 1992 Service Manual

Solt Diameter and Wrench Size
" M5 . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 8 mm
" M6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 mm
" M8 . . . . . . . . . . . . . . . . . . . .. . . . . 12mmor13mm
" M10 . .. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . .17 mm
" M12 . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .19 mm
" M14 . . . : . . . . . . . . . . . . . . .. . . . . . . . . . . . . 22 mm
Spark Plug Socket . A special socket for spark plugs is the
correct size, is deep enough to accommodate a spark plug's
length, and includes a rubber insert to both protect the spark
plug from damage and grip it for easier removal. See Fig. 9.
Fig. 9. Spark plug socket .
FUNDAMENTALS FOR THE DO-ITYOURSELF OWNER
010-9
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Pliers . A fewof the many types of pliers are shown in Fig. 10 .
Most are used for holding irregular objects, bending, or crimp-
ing. Some have special applications .
A needlenose plier is used for gripping small and poorly ac-
cessible objects, and is useful for wiring and other electrical
work. A locking plier such as the Vise-Grip® is useful because
of its tight grip.
Snap-ring and circlip pliers with special tipped jacas are used
lo remove and install snap-rings or circlips . A Channel-lock® or
water pump plier has adjustable jacas that can be quickly
changed to match the size of the object being held to give great-
erleverage .
An adjustable wrench can be a useful addition to a small tool
kit. See Fig. 11 . It can substitute in a pinch, if two wrenches of
the same size are needed lo remove a nut and bolt . Use extra
care with adjustable wrenches, as they tend to loosen, slip, and
damage fasteners.
Fig. 11 . Adjustable wrench .
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Compared to a wrench of the correct size, an adjustable
wrench is always second best. They should only be used when
the correct size wrench is not available. Choose one of average
size range, about 6 to 8 inches in length .
Jack Stands
Strong jack stands are extremely important for any work that
is done under the car. Use only jack stands that are designed
for the purpose. Blocks of wood, concrete, bricks, etc. are not
safe or suitable substitutes .
WARNING -
A jack should be used only to raise the vehicle and
should not be used to support the car for a long pe-
riod. Always use jack stands to support a raised ve-
hicle.
Jack stands are available 1n severa¡ styles . A typical jack
stand is shown in Fig . 12 . The best ones are made of heavy ma-
terial for strength, have a wide base for stability, and are
equipped lo positively lock in their raised positions. Get the best
ones available.
Oil Change Equipment
Changing engine oil requires a 17mm socket or wrench to
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loosen and tighten the drain plug and a drain pan (at least 8 qt .
capacity) . An oil filter wrench is not required . These items are
Fig. 10 . Pliers . From left, snap-ring, needlenose, adjustable-joint
shown in Fig. 13 . A wide, loca drain pan wíll fit more easily under
(Channellock©), slip-joint, and locking (Vise-Grip®). the car. Use a funnel lo pour the new oil into the engine .
TOOLS