11
905077 REV B 7/23/14, 1970-78 CAMARO WITH A/C EVAP KIT PG 11 OF 28
Evaporator Bracket and A/C
& Heater Hose Installation
1. On a workbench, install evaporator rear bracket
and A/C & heater hose with properly lubricated
O-rings (See Figure 14, Page 12, and Figure 15a,
Page 13).
2. Install front mounting bracket on evaporator
using (2) 1/4-20 x 1/2” hex bolts, and tighten
as shown in Figure 13, below.
Firewall Cover Installation
1. Enlarge (2) OEM firewall holes to 5/16” (See Figure 12, below).
2. Apply a 1/4” bead of silicone around the back side of the firewall cover (See Figure 12, below).
3. From inside the car, install the firewall cover onto the firewall (See Figure 12, below). From the engine
compartment, secure the firewall cover to the firewall using (3) 1/4-20 x 1” hex bolts with washers
(See Figure 12, below).
4. Apply a 1/4” bead of silicone around the back side of the heater firewall cover bracket as shown in Figure
12, below.
5. From inside the car, install heater firewall cover assembly onto firewall (See Figure 12, below). From the
engine compartment, secure heater firewall cover assembly to firewall using (2) 1/4-20 x 1/2” hex bolts
with washers (See Figure 12, below).
Engine
Compartment
Side of
Firewall
(3) 1/4-20 X 1”
Hex Bolts
w/ Washers
Enlarge OEM
Holes to 5/16”
Back Side
of Firewall
Cover
Silicone
View Shown From
Inside Car, Through
Dash
Figure 12
Figure 13
(2)1/4-20 X 1/2”
Hex Bolt
Back Side of
Heater Firewall
Cover Assembly
Heater Firewall
Cover Assembly
644021
Silicone
(2) 1/4-20 X 1/2”
Hex Bolts
w/ Washers
Firewall
Cover
648228
