11
GEN IV 1968-76 CORVETTE
w/o AC
901174-PCZ REV A 8/3/05, GEN IV 68-76 CORVETTE w/o AC INSTRUCTIONS PG 11 OF 29
USING THE O.E.M. DEFROST DUCT MOUNTING SCREWS INSTALL THE DEFROST DUCT WITH HOSE ADAPTER AS SHOWN
IN FIGURE 9 BELOW.
REMOVE VENT KNOBS AND RETAIN
DEFROST
DUCT
w/ HOSE
ADAPTER
REMOVE
VENT KNOB
VENT
ADAPTER
INNER A/C DUCT
HOSE ADAPTER
VENT
KNOB
OUTER A/C DUCT
HOSE ADAPTER
REMOVE
VENT KNOB
FIGURE 9
DEFROST DUCT & PS AND DS SIDE A/C DUCT HOSE ADAPTER INSTALLATION
REMOVE THE PASSENGER AND DRIVER SIDE VENT ADAPTERS (DISCARD) AS SHOWN IN FIGURE 10 BELOW.
INSTALL THE INNER AND OUTER A/C DUCT HOSE ADAPTERS AS SHOWN IN FIGURE 10 BELOW. USE O.E.M.
SCREWS TO SECURE ADAPTERS TO DASH.
INSTALL THE VENT KNOB AS SHOWN USING A 10-24 x 1 1/4” PH PAN HEAD SCREW AND 3/16” FLAT WASHER.
NOTE: RETAIN MOUNTING HARDWARE.
NOTE: THE PASSENGER SIDE INSTALLATION IS SHOWN BELOW IN FIGURE 10, REPEAT THE SAME STEPS
FOR THE DRIVER SIDE INSTALLATION.
FIGURE 10
O.E.M. DEFROST
DUCT MNTG
SCREWS
(3) O.E.M.
SCREWS
18254-VUB
10-24 x 1 1/4”
PH PAN HEAD SCREW
18123-VUB
3/16 FLT WASHER