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11-10
EXHAUST SYSTEM
IFOLD
I ? " "
A
I
, E T
L.
I
.I
COUNTERWEIGHT
\
THERMOSTAT
RETAl N
ERS
KR
234
B
Fig. 21-Manifold
Heat Control Valve-Center
Engines)
Outlet Manifold 1361,383 and 426 Cu. In.
Cleaning and Inspection
Move the valve shaft back and forth and test the
operation. If the shaft is binding in the manifold, ap-
ply Manifold Heat Control Valve Solvent, Part Num-
ber 1879318.
Installation (273 Cu. In. Engines)
(1)
Place the shaft in the extreme counterclockwise
position.
(2)
Install a new thermostat in the shaft slot (Fig.
23)
and position with the outer end in the lower right
hand position.
(3)
Wrap the outer end of the thermostat counter-
clockwise and engage under the stop pin (Fig.
23).
(4)
Place the counterweight on the shaft with the
shield in the downward position and insert the lock
in
the shaft slot.
(5)
Center the counterweight on the shaft and turn
the shaft clockwise until the bumper passes the stop
pin (Fig.
24).
Fig. 22-Removing
Thermostat431 8 Cu.
In.
Engine)
Fig. 234nstalling Thermostat 1273 Cu. In.
Enginej
(6)
Press the counterweight on the shaft until
seated. Tighten the clamp bolt
50
inch-pounds with
Tool C-3380 Torque Wrench.
(7) Make sure the anti-rattle spring on the opposite
end of the shaft is in place. Test the operation of the
valve for freedom of movement.
Thermostat-lnstcrllcrtion
(31 8 Cu. In. Engine)
(1) Be sure the shaft retainer is in place on the in-
ner end of the valve shaft. Place the valve shaft in the
extreme clockwise position.
(2)
Install a new thermostat in the slot in the inner
end of the shaft (Fig.
25)
with the outer end of the
thermostat in the lower left hand position. Press the
inner end of the thermostat into the shaft and seat
firmly.
(3) Wrap the outer end of the thermostat clock-
wise and engage under the pin (Fig.
25).
(4)
Install the anti-rattle spring on the pin and end
of the valve shaft. Make sure it does not interfere
with the thermostat.
Fig. 2 U n s t a l l i n g Counterweight 1273 CU. In.
Engine)
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