General Information
1-14
is devoid of sharp edges and carefully
polished. They have an easy-to-clean
finish and are comfortable to use.
Quality tools are a good investment.
Some of the procedures in this manual
specify special tools. In many cases the
tools is illustrated in use. Those with a
large tool kit may be able to perform the
jobs, However, in some cases, the
specialized equipment or expertise may
make it impractical for the home
mechanic to attempt the procedure.
When necessary, such operations are
recommended to have a dealership or
specialist perform the task. It may be
less expensive to have a professional
perform these jobs, especially when
considering the cost of equipment.
When purchasing tools to perform the
procedures covered in this manual,
consider the tool’s potential frequency of
use. If a tool kit is just now being
started, consider purchasing a basic tool
set from a quality tool supplier and they
may offer substantial savings when
complicated, specialized tools need to
be added.
Screwdrivers
Screwdrivers of various lengths and
types are mandatory for the simplest
tool kit. The two basic types are the
slotted tip (flat blade) and the Phillips tip.
These are available in sets that often
include an assortment of tip size and
shaft lengths. As with all tools, use a
screwdriver designed for the job. Make
sure the tool fits the size of the fastener.
Use them only for driving screws. Never
use a screwdriver for prying or chiseling
metal. Repair or replace worn or
damaged screwdrivers. A worn tip may
damage the fastener, making it difficult
to remove.
Phillips-head screws are often damaged
by incorrectly fitting screwdrivers.
Quality Phillips screwdrivers are
manufactured with their crosshead tip
machined to Phillips Screw Company
specifications. Poor quality or damaged
Phillips screwdrivers can back out and
round over the screw head. Weak or
soft screw materials can make removal
more difficult. The best type of
screwdriver to use on Phillips screw is
the ACR Phillips II screwdriver, patented
by the horizontal anti-cam out ribs found
on the driving faces or flutes of the
screwdriver’s tip (figure 4). ACR Phillips
II screwdrivers were designed as part of
a manufacturing drive system to be
used with ACR Phillips II screws, but
they work well. Tool suppliers offer ACR
Phillips II screwdrivers in different Tip
size and interchangeable bits to fit
screwdriver bit holders.
Note
Another way to prevent the
screwdriver from rounding out the
head of the screw is to apply valve
grinding compound onto the tip. After
loosening or tightening the screw,
clean the screw recess to prevent
engine oil contamination.
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