Question about Mitsubishi Galant
TSB out on this subject, to access the drain tube from the outside
the car needs to be on a rack. You will see a hole in the bulkhead of
the firewall, in that hole is where the drain tube is. Have to use an
airblower to unclog, this is only a temp fix. HVAC unit has to come out
and be dissassembled to trim back foam in case that holds debris in and
wont let drain. Dash has to come out and all
ductwork as well just to access the HVAC unit. Dont have that TSB number
handy, but websites like mitchell.com and alldata.com have them on
Other Mitsubishi's Owners comment about this problem and tell us that here is the solution:
a.- open the driver's door
b.- locate where the air conditioner blower box is attached to the passenger side of the firewall – look to the immediate right at the top of the gas pedal arm
c.- condensation flows toward the front of the vehicle through the firewall at the leftmost edge of the air conditioner blower box
d.- open the hood and stand next to the front wheel on the driver's side
e.- look down at the firewall over the battery and to the passenger side of the brake master cylinder
f.- locate the small diameter metal tubes running horizontally and attached to the engine compartment firewall
g.- locate the hole in the engine compartment firewall panel behind the small diameter metal tubes
h.- this hole leads to the drain opening in the air conditioner blower box mounted in the passenger compartment
i.- follow the brake tubes as they run from under the vehicle and turn toward the front wheel on the driver's side
j.- locate the hole in the engine compartment panel behind the brake tubes
k.- insert a short length of stiff wire into the hole through the engine compartment panel to unblock the drain hole
If the A/C unit is not clogged, then the gromet around the drain portion of the hvac unit that seals the firewall to the HVAC is dry rotted and the water that is supposed to be draining outside is comming back inside. For example, this is a very common problem with the 04-05 endeavor. dash and hvac unit have to be removed to replace a $1.50 grommet. this is a very big job, all day job.
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Posted on Jun 04, 2010
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Posted on Jan 02, 2017
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