Surtek 107368 Manual De Usuario página 6

E N G L I S H
WHAT IS TIMING?
1. The timing light is used to check the timing
on spark ignition engines. Correct timing has
a decisive influence on the performance and
service life of the engine.
2. At the firing point the spark plug ignites
the fuel-air mixture forced into the cylinder by
the piston. The flame spreads from the point
of ignition throughout the entire combustion
chamber. This is the time when the greatest
combustion pressure is exerted on the piston
and therefore also the greatest force is acting
on the piston. As a certain time elapses between
ignition and the flame spreading over the entire
combustion chamber, ignition must occur before
top dead centre. The correct firing point is
specified by the vehicle manufacturer. Incorrect
adjustment of ignition timing can damage your
vehicle.
In the owner's manual, in do-it-yourself books
and data sheets you will find lots of helpful
information on testing and tuning your vehicle.
IMPORTANT:
Always switch off the ignition before doing the
following:
- Connecting motor testing instruments.
- Replacing ignition system components When working
on electronic ignition systems be sure not to touch
any live parts once the ignition is on and the engine
is running.
-With electronic ignition systems dangerous voltages
can occur throughout the system, not only at
individual units such as the coil or distributor, but also
at the cable harness, on pin-and-socket connectors, on
connections to testing instruments, etc. When testing
and tuning with the timing light, be sure not to touch
any leads between the instrument and the vehicle.
PREPARATIONS FOR ADJUSTING THE
TIMING
Bring the engine to operating temperature.
Make sure that the contact breaker points or the
Dwell angle are correctly adjusted.
1. Use your owner's manual to determine the
pertinent technical data of your vehicle (e.g.
rpm, dwell angle).
2. Two marks are needed for adjusting the
6
timing:
a. a fixed mark on the engine housing, usually
a pin, arrow or graduated scale.
b. a rotating mark on the flywheel or on the
cranksnaft pulley, mostiy in the form of a
notch, a steet ball or a graduated scale.
You will find that these marks are easier to see
if you clean them and mark them with chalk
or white paint.
IMPORTANT: The above marks are usually in the
vicinity of hot and rotating parts. Be careful of the
exhaust manifolds, fan blades, V-belts, etc.
TESTING PROCEDURE
1. Electrical connection of the timing light. The
timing light works directly with the car battery.
Connect the red clip to the positive (+) terminal
and the black clip to the negative (-) terminal.
(See figure 1)
2. The light pulse is usually triggered by the
ignition pulse of the first cylinder. This may differ
in some vehicles, therefore consult your owner's
manual.
3. Attach the inductive clamp to the clean
Ignition cable so that the arrow shown on the
clip points in the direction of the spark plug.
4. Start the engine, which should be at operating
temperature, and bring it up to the adjustment
speed recommended by the manufacturer. Press
the switch on the handle of the timing light.
The Advance indicator will be lighted. Point the
timing light at the timing marks. The 2 marks
should normally be opposite one another. If this
is not so, proceed as in point 5.
5. Loosen the clamping of fastening screws on
the distributor until the distributor can be turned
by hand. Do not loosen it too far, otherwise the
distributor will turn by itself.
6. Turn the distributor clockwise or anti-clockwise
until the rotating mark is in the position
recommended by the vehicle manufacturer.
7. Retighten the screws you have loosened, so
that the distributor setting is maintained.
8. Recheck the timing.