Positive Crankcase Ventilation - GMC Chevrolet CAMARO 1969 Owner's Manual

*positive
crankcase
ventilation (pcv)
IF|LTERED Aml
KEY To rev SYSTEM
F= r||.m:n Am
- 9 1=n|.uw BY BASES
xl* F+l
mm-v conlusrlnz nlxruns
lun INTAKE
Pc v
'CONTROL
L.4;
VALVE
V/'
'49
cnANm:As£
slow BY GASES
OPERATION: General Motors vehicles are equipped with
Positive Crankcase Ventilation-a system which permits no
crankcase emission to be discharged into the ambient air.
To function properly, the system depends on the PCV
Valve (smog valve) which recirculates and burns blow-by
gases inside the engine.
MAINTENANCE: This valve must be clean in order to
maintain efficient engine operation. An operational check
of the PCV Valve should be made at the first oil change
(4 months or 6,000 miles, whichever occurs first). Every
12 months or 12,000 miles, whichever occurs first, the
PCVValve should be replaced (cleaned on Corvairengines).
Also, all hoses, fittings and the inlet air filter should be
inspected, cleaned and replaced, if necessary. Always
specify an AC PCV valve at replacement time.
NOTE:
retor
*Systems illustrated on V-8 engines, 6-cylinder systems similar.
tne trouble.