Bonneville V6-231 3.8L VIN 3 SFI (1988)
Figure 1 - Sealing Air Inlet Screen
5.
Check heater/evaporator case for debris. Remove any debris present through the resistor block opening. If debris is imbedded into the evaporator
core face and cannot be removed, the core will have to be removed from the vehicle and cleaned off car. If a large amount of debris is present in
the heater/evaporator case, the air inlet screen will require sealing around the windshield wiper post holes and fender edges as shown in Figure 1.
6.
Command the air mix valve (door) to the maximum cold position and the blower to low speed by:
On Bonneville vehicles - turning the ignition to the on position without starting the engine and setting the Electronic Climate Control to Econ,
60~F temperature and low blower.
On Sunbird and Grand Am vehicles, move the temperature door control lever to the maximum cold position, blower on low and turn the
ignition on.
7.
Open all windows and doors. Exit vehicle.
8.
Place drain pan with at least a two quart capacity below heater/evaporator drain hole to catch disinfectant and rinse water runoff.
FIGURE 2
9.
Position pedestal fan as shown in Figure 2 and turn on high to provide cross ventilation during cleaning procedure.
10.
Use Kent-Moore tool J-36645 or equivalent siphon-type parts cleaning spray gun capable of delivering two ounces per minute of liquid when
driven with shop air at 80-90 psi. Insert the nozzle of the spray gun through the resistor block opening and insert siphon hose into container of
disinfectant. Take care to place the bottle of disinfectant in a secure, upright position to avoid spilling contents. Direct spray toward evaporator
face, taking extra care to ensure adequate coverage of the corners and edges, completely saturating the entire core. Use the entire container of
solution.
CAUTION:
Do not allow disinfectant to come into contact with hot engine components such as the exhaust manifold.
11.
Reach into the vehicle and turn the ignition to the off position and allow the core to soak for five minutes.
