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| A/C delete: Help!! | |
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| Tweet Topic Started: Aug 15 2009, 09:18 PM (1,886 Views) | |
| Coche Blanco | Aug 15 2009, 09:18 PM Post #1 |
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Troll Certified
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Okay, so I got rid of my A/C system, but now i'm wondering how I can get cooler air in my Metro. How/where does the "fan" run? Like where are the ducts? I ask because when I drive down the highway and turn the air on it's a good 15 degrees hotter than if I stick my hand out the window. What is heating the air? I'm pretty sure it's the engine, but is there a way to fix it? |
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| wikityler | Aug 15 2009, 09:32 PM Post #2 |
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Some say...
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The air is drawn from the vent between the wipers and the hood when outside air is selected. When inside air is selected it is drawn from behind the lower dash on the passenger side. The air out the window is likely cooler due to convection. |
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| Johnny Mullet | Aug 15 2009, 09:41 PM Post #3 |
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Fear the Mullet
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If you are getting heat from the ducts I would inspect the blend door. When the A/C was removed, was the evaporator behind the dash removed also? |
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| Coche Blanco | Aug 15 2009, 10:27 PM Post #4 |
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Troll Certified
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I am not sure, I didn't do the job. Do you have a picture of it? |
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| Woodie | Aug 16 2009, 06:09 AM Post #5 |
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The heater core is always full of 200 degree water right behind the radio. It's in a plastic box full of air passages and flaps. Sometimes the flaps don't close all the way when you move the levers on the dashboard, but even if everything is working perfectly the air is still going through that box, just not though the core itself. Most cars have a valve that cuts off water flow to the heater core when set to full cold, our cars don't. You can bypass the core by disconnecting the heater hoses under the hood and connecting them to each other. Pain in the butt to have to do that every spring and fall and also hard on the core itself where you push on and pull off the hoses, probably end up breaking the solder joints. The best solution would be to install a valve that you could reach under the hood and switch on or off twice a year. A truly helpful person would now give you a part number for such a valve. Hopefully such a person reads this, I need a Guinness.
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| Potter | Aug 16 2009, 01:49 PM Post #6 |
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Col. Potter
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cooler air?? hmmm you could do like bad bent and do a roof scoop, or you could take off the fenders and add vents like in old 80s moddles and previous Chevorlets... just a thaught, (hey thats what imma gonna do when i tear my A/C out, but im gonna add vents on the fender to get more air to me. |
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| Cobb | Aug 16 2009, 08:28 PM Post #7 |
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BANNED
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I think all cars are like that. The hvac air is warmer as its taking air from the earm engine under the hood and it draws the air off the hood. I normally crack the windows an inch and I am fine. |
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| rmcelwee | Aug 16 2009, 10:41 PM Post #8 |
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The air actually comes from outside the hood (under the plastic vent looking thing below the glass). Miatas are set up like this too (door that blocks off the heater core). We get something called "hot foot" from the exhaust running right next to the driver's right leg and the heater core always being on. Some will hook up a set of bypass valves during the summer to keep the heat out of the cabin. Be very careful to not block off the water to the heater core and instead bypass it (assuming a Geo is the same as a Miata). The water MUST be allowed to come off the back of the head or you could warp it. So, just set up a couple of three way valves (or a series of two way valves) to keep it from entering the firewall. On my Miata racecar I just pulled the two hoses off of the heater core and got another hose as a bypass. I pulled the core for weight but I doubt you want to go that far with it. FWIW, the area below the glass is a high pressure area and that is why the air blows into the car through the vents even if the fan is off. Increasing this flow may help out. I'm not sure how "twisted" the vent system is in the Geo but maybe you could straighten it out a bit OR block off the vents on the pax side of the car so you get 100% of the air instead of 50% of it. |
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| vpoppv | Aug 17 2009, 12:05 AM Post #9 |
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New Member
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Could something like this be done with out cars, if you take the plastic "rivets" out of the vent guard? http://www.diyelectriccar.com/forums/showthread.php/air-conditioning-questions-2374p2.html?highlight=power+steering |
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| bennie442 | Aug 17 2009, 07:15 PM Post #10 |
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Coche Blanco, this question begs the obvious, you HAD a/c, and removed it and, now that it's gone, you don't have cool air inside. Hadn't you tried running the fan WITHOUT the a/c to see what it would be like when the a/c was gone? Unless the blend door is not operating as it should, don't expect any change from what you now have. |
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| Coche Blanco | Aug 17 2009, 09:26 PM Post #11 |
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Troll Certified
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I actually didn't word that post correctly, I never had the A/C working. There were numerous problems with A/C and ended up getting rid of it. |
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| 3cyltom | Aug 17 2009, 09:57 PM Post #12 |
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everything i've ever driven does this, expesially noticeable in the metro. hot day last sat. and i just kept windows and side vents in back open. not too bad. still miserable and hot. i think my blower switch is stuck in position 1, you can hear it kick on when you turn the key on. not much you can do. i have a buddy that does this with his throttle body heater in the summer on his t/a with a brass shut off valve. if you had to, you could jump from the heater tube connections on engine instead of heater core. a lot easier to change the heater tube on the engine than pulling the dash to replace the heater core. |
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| Coche Blanco | Aug 18 2009, 04:48 PM Post #13 |
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Troll Certified
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I think I may have to run some piping with the air. |
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| metroschultz | Aug 18 2009, 11:27 PM Post #14 |
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Please just call me; "Schultz"
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A heater control valve for a 1996 ford ranger has 4 ports 2 in 2 out and will plumb right into the system cut your heater hoses and add the valve. It is vacuum operated so you have to hook up a vacuum source to close it for the summer. In the closed position it routes the coolant back to the system and not through the heater core. |
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| Woodie | Aug 19 2009, 06:07 AM Post #15 |
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See there? I got my Guinness and a decent human being came along with the information. Everybody's happy.
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