minimal heat
Thread Starter
Racer
Joined: Apr 2005
Posts: 484
Likes: 5
From: Madison Wisconsin
minimal heat
I have a question about my 1993 Corvette. I am getting only minimal heat out of the heater. I have the Electronic Climate Control and it appears to be functioning properly. As I move the temp from 90 degrees to 60 degrees I can hear what I believe is the blend door opening and closing. I'm guessing I might have a restricted heater core. I notices one of the holes that appears to run from the upper coolant tank to the heater core is cool in comparison to the other holes. Is this an indication of a restricted heater core and if so, what is the best way to flush the core?
Thanks for the any help you can lend.
Jim
Thanks for the any help you can lend.
Jim
Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 0
From: Long Island New York
as long as your heater control valve is operating properly (i am only assuming you have one) it sounds like you are on to something. i had a core clog on me once. I removed both hoses, and forced compressed air int one tube. Out the other came a sludge snake. Problem solved! Just be careful how much pressure. I used a 100+ psi and may have only gotten lucky; i'm sure you could pop the core, and i'd hate to see that happen to you if it wasn't your problem to begin with.... 
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
If the core is plugged, coolant flows over the top of the core, but not through it. Plugged up or not, both the inlet and outlet hoses should be hot. If not, the inlet might be restricted (check the throttle body for sludge and rust), or the system might be low on coolant. You can flush the core with your garden hose or compressed air, but go easy on the pressure - operating design is only a little better than cap pressure, usually 15 to 17 psi.
Intermediate
Joined: Feb 2005
Posts: 42
Likes: 0
From: Bowling Green KY
This piece had separated on me at the cap fitting and was leaking coolant.
http://www.artscorvetteparts.com/par...8-dcee35aeb114
It caused a similar problem.
http://www.artscorvetteparts.com/par...8-dcee35aeb114
It caused a similar problem.
Melting Slicks
Joined: May 2001
Posts: 2,143
Likes: 7
From: San Diego CA
Originally Posted by jimkari
I have a question about my 1993 Corvette. I am getting only minimal heat out of the heater...
