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901149 REV D 7/30/14, INST 67-72 CHEVY PICKUP wo AC EVAP KIT PG 13 OF 24
#10 Suction
Line
O-rings
Heater
Hose
NOTE: Flow Direction Follows
Molded Arrow on Valve.
Liquid
Line
FROM HTR CNTRL VLV
TO EVAPORATOR
FROM EVAPORATOR
TO WATER PUMP
FROM INTAKE
MANIFOLD
Heater Control Valve Installation
Route heater hose from water pump to the heater line coming through the firewall as shown in Figure 10,
below. Secure using hose clamps. NOTE: A small amount of silicone spray will ease heater hose
installation.
Route heater hose from the intake to the heater line coming through the firewall as shown below. NOTE:
Install heater control valve in line with intake manifold (pressure side) heater hose, and secure
using hose clamps as shown. Also note proper flow direction.
Hose should protrude through the firewall cover slightly to close the gap between the aluminum line and the
firewall cover. Seal any remaining gap with RTV silicone.
1.
2.
3.
Figure 10
