Thermostatically Controlled Air Cleaner (Tac) System - Jeep 1979 CJ-5 Technical & Service Manual

Fig. 1 J - 7 8 PCV Valve Test
PCV Valve Flow
Engine
Manifold
Vacuum
(in. Hg.)
A i r Flow CFM (liters/second)
Engine
Manifold
Vacuum
(in. Hg.)
Yellow
Six-Cylinder
Black
Eight-Cylinder
16 1.34-1.63 (.003-.004)
13 1.30-1.90 (.0Q3-.005)
7
2.70-3.79 (.007-.010)
5 1.21-2.26 (.003-.006)
3 3.30-4.39 (.009-.012)
2 1.28-2.56 (.003-.007)
8 0 5 8 6
Ii-Cf tinier
A polyurethane foam PCV air inlet filter is located in
a filter retainer in the air cleaner.
OENERAL
The Thermostatically Controlled Air Cleaner (TAC)
System provides pre-warmed air to the carburetor air
cleaner during engine warm-up, while under-hood air
FUEL SYSTEMS 1J-43
M O U L D E D
HOSES
Fig. 1 J - 7 9 PCV Air inlet Filter—Six-Cylinder
Eight-Cylinder
A polyurethane foam PCV air inlet filter is located in
the sealed oil filler cap.
(1) Remove oil filler cap from engine.
(2) Apply light air pressure in reverse direction of
normal flow (through filler tube opening of cap).
(3) Install oil filler cap and connect hose from air
cleaner to oil filler cap.
N O T E : Replace the filler cap if filter is deteriorated.
"ZD
Page
Testing 1J-44
Thermal Sensor U - 4 4
temperature is low. Warm intake air permits the carbu-
retor to be calibrated leaner, reducing hydrocarbon
emissions. It also improves engine warm-up and min-
imizes carburetor icing.
c o N T R O t t g ©
Mm mLmmmii
Pl|S
General 1 J - 4 3
Operation U - 4 4
(1) Rotate retainer to remove from air cleaner (fig.
1J-79). ;
(2) Clean filter in kerosene.
;
(3) Lightly oil filter with clean engine oil.
(4) Install filter and retainer to air cleaner.