Controlled Combustion System (Ccs) - Chevrolet Monte Carlo 1971 Owner's Manual

CONTROLLED COMBUSTION
SYSTEM (CCS)
NEW CARBURETOR
LEAN MIXTURES,
ENGINE IDLE
INCREASED
HIGH TEMPERATURE
THERMOSTAT FOR
ENGINE COOLANT
KEY TO C.C.S. SYSTEM
.... HEATEDUNDERHOODAIR
~
uttDERHOOD AIR
• HOTEXKAUST
49
OPERATION: The Controlled Combustion System
is entirely separate from the Positive Crankcase Ven-
tilation System and is designed to reduce pollutants
in the exhaust by altering the combustion process.
CCS is a combination of design features including a
special air cleaner which incorporates thermostatic
control of heated air to the carburetor, a special
calibrated carburetor and distributor and a modified
combustion chamber design.
MAINTENANCE: Complete effectiveness of the
system, as well as full power and performance,
depend upon engine idle speed, ignition tim-
ing, and dwell being set according to the spec-
ifications shown on a label under the hood.
These adjustments should be checked at the
first oil change (4 months or 6,000 miles,
whichever comes first). Subsequent checks
should be made at 12 month or 12,000 mile
intervals, whichever comes first. These adjust-
ments are also included as part of the quality
tune-up recommended at the same intervals.