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Jim Grant's Tech Tips '94 Chevy Cavalier, Heater Core Drain
Q:
My
sister in law came to me the other day; she has a ‘94 Chevy Cavalier.
She said anti-freeze was pouring out the bottom of the motor. I took a
look at it, and it was coming out of a spout inside the firewall where
the A/C lines go to it, had a 90 degree elbow coming off of it, with nothing
attached to it. Where is the other end to this spout? Is it on the motor?
I was thinking it was the heater core, but most if not all the heater
cores I've seen only have 2 hoses coming from them. I found the 2 hoses;
they are hooked into 2 spouts at the firewall. They didn't make a 3rd
spout did they? This can't be an overflow, because if you start it up,
it will drain all the fluid out of the radiator and engine. I have been
looking and looking as to where this thing goes. Looks like there was
a hose of some sort on it and it went somewhere, but I just can't find
out where. It’s her only transportation.
A:
The
spout you are referring to is the drain for the A/C evaporator. When a
heater core fails coolant will exit through the A/C drain. To get her
up and going quickly you can by bass the heater core by hooking the 2
heater hoses together. This will allow her time to plan for the time and
cost of the repair.
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