11
901189 REV D 02/02/17, INST 55-59 CHEV P-UP w/ STANDARD CONTROLS EVAP KIT PG 11 OF 24
Evaporator Installation
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Lift the evaporator unit up under the dashboard. Secure loosely to the firewall using (2) 1/4-20 x 1” hex bolts
and (2) 1/4” washers (See Figure 9, below).
NOTE: To ensure proper drainage, it is very important that
the evaporator is level, both left-right and fore-aft. Check for level on the flat portions of the case
around the drain.
Install the evaporator front bracket onto the evaporator using (2) 1/4-20 x 1/2” hex bolts, and tighten as
shown in Figure 9, below.
Remove & replace the OEM screws in the glove box mounting brackets. Replace with (2) 10-32 x 1” pan head
screws.
Secure the evaporator front bracket to the OEM glove box mounting bracket using (2) 3/16” SAE flat washers
and (2) 10-32 nuts with star washers (See Figure 9a, below).
Using the center louver A/C plenum as a guide, mark and drill (2) 5/32” holes into the dash bottom (See
Figure 9, below).
Secure the evaporator plenum to the dash using (2) #8 x 1/2” pan head screws, and install (2) 1/2” plastic
plugs into the holes as shown in Figure 9, below.
Install the (2) louvers into the evaporator plenum as shown in Figure 9, below.
Verify that the evaporator unit is level and square to the dash; then tighten all mounting bolts.
NOTE: Tighten
the bolt on the firewall first. Then tighten the front mounting bracket.
Install the #10 suction line as shown in Figure 9b, below.
NOTE: Wrap the #10 fitting connections with
press tape.
NOTE: To ensure a watertight seal between the passenger compartment and the vehicle exterior, for
all bolts passing through the firewall, Vintage Air recommends coating the threads with silicone prior
to installation. Before installing the evaporator assembly under the dashboard, the glove box door
hinge needs to be reinstalled (if removed). Once the evaporator assembly is installed, there will be
insufficient clearance to reinstall the glove box door hinge.
Perform the Following:
NOTE: After installing #10 suction line, wrap all
exposed metal (fitting & tube) with supplied press
tape.
Press Tape
#10 Suction Line
092161
Evaporator Front
Bracket
643083
(2) 10-32 Nuts
with Star Washers
18251-VUB
(2)
1/4-20 x 1/2”
Hex Bolts
(2)
3/16” SAE
Flat Washers
OEM
Glove Box
Mounting
Bracket
OEM Glove Box
Mounting Bracket
(2) 1/4-20 x 1”
Hex Bolts
(2) 1/4”
Washers
Mark & Drill
(2) 5/32” Holes
(2) #8 x 1/2”
Pan Head Screws
(2) 1/2” Plastic Plugs
(2) Louvers
(2) 10-32 x 1”
Pan Head Screws
Replace These
OEM Screws
Before Installing
Evaporator
#10 O-ring
Figure 9
Figure 9b
Figure 9a
View From
Passenger Side
Inside of Cab
