Plymouth Valiant V-100 1965 Service – Technical Manual page 322

11-8
EXHAUST SYSTEM
L
Fig. 13-Manifold Heat Control V a l v e
1170 and 2 2 5 Cu. In. Engines)
MANIFOLD HEAT CONTROL VALVE (170
and 225 Cu. In.
Engines)
The application of a few drops of Manifold Heat
Control Valve Solvent, Part Number 1879318, every
six months, to both ends of the manifold heat ,control
valve shaft will keep the valve working freely. The
solvent should be applied when the engine is
COOL
and the solvent allowed to soak a few minutes. Work
the valve back and forth until it turns freely.
Operation of the manifold heat control valve (Fig.
13), should be inspected periodically. With the engine
idling, accelerate momentarily to wide open
throttle.
The counterweight should respond by moving coun-
terclockwise approximately Yz-inch and return to its
original position. If no movement is observed, the
shaft is binding due to accumulation of deposits or
the thermostat is weak or broken.
Removal
(1) Remove the counterweight and lock from the
end of the shaft by loosening the clamp bolt (Fig.
EXHAUSI MANIFOLD RETAINER
LOCK BUSHING VALVE
I
COll SPRING
SHAFT
NY1040C
COUNlfRWflGHl
Fig. 1 &Manifold
Heat Control Valve
11 70 and 2 2 5 Cu. In. Engines)
N K
Fig. 1 5 4 n s t a l l i n g Thermostat
11 70
and
225
Cu. In. Engines)
14).
(2) Unhook the thermostat from the stop pin and
remove from the valve shaft slot.
(3)
If the valve shaft is binding in the manifold,
apply Manifold Heat Control Valve Solvent, Part
Number 1879318.
(4)
Examine the bumper stop on the counter-
weight. If damaged, replace with a new one.
Installation
(1) Place the shaft in the extreme clockwise posi-
tion. Place a new thermostat in the shaft slot (Fig.
15) and position it with the outer end in the lower
left hand position.
(2) Wrap the outer end of the thermostat clock-
wise and engage it under the stop pin (Fig.
15).
(3)
Place the counterweight on the shaft, with the
shield in the upward position and insert the lock in
the shaft slot (Fig. 1 6 ) .
----
-.
w
- I
HAFT
NK125A
Fig. 16--lnstalIing Counterweight 11 70 and
2 2 5 Cu. In. Engines)