Pontiac 1953 Owner's Manual page 44

Your Pontiac dealer's Tune-Up Diagnosis service will help find
deficiencies in the ignition, compression, and carburetion systems
before they occur, thus saving you inconvenience and expense.
SERVICES INCLUDED IN THE TUNE-UP DIAGNOSIS-The
services of the Tune-Up Diagnosis can be segregated into three groups
of operations. The first group includes the adjustments which are
recommended as necessary every spring and fall or every 10,000
miles. The second group has the lubrication of those engine units
which do not require attention every 2,000 miles. The last part of the
Tune-Up Diagnosis covers checking and testing the ignition, com-
pression; and carburetion systems for indications of malfunction.
TUNE-UP ADJUSTMENT GROUP
1. Clean and space spark plulls (spark plull Ilap .025").
2. Clean and space distributor points (breaker contact Ilap .022" on six
cylinder and .016' on eillht).
3. Set timinll.
4. Adjust carburetor Idle.
MINOR MAINTENANCE AND LUBRICATION GROUP
1. Add distilled water to battery.
2. Wipe external parts of spark plUlls, distributor cap, coil terminal
and Ignition wires.
3. Lubricate distributor cam wick, cam, breaker-point pivot, and
breaker plate felt.
4. Lubricate carburetor pump arm.
5. Clean fuel pump sediment bowl.
6. Clean and re-oil carburetor air cleaner, and oil filler and ventilator
cap.
NOTE: When heavy duty oil bath air cleaner and ventilator equipment Is
used, ventilator outlet will also be cleaned.
DIAGNOSIS GROUP
By purchasing the complete Tune-Up Diagnosis rather than having
the individual operations performed at separate times, a saving is
achieved by elimihating over-lapping or duplicating operations.
The Tune-Up Diagnosis checks and tests eliminate "guesswork"
errors in diagnosis. These tests also help avoid starting difficulty in
cold weather or trouble on the road by finding indications of im-
pending trouble before it occurs.
Engine Compression-Compression in your engine is the squeezing
of the air-fuel mixture in the cylinder.
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