heater core
Thread Starter
On The Tree
Joined: Aug 2006
Posts: 150
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From: okc, ok
heater core so i have noticed as it starting to get colder here in oklahoma...that my heater really isnt performing to my standards!! lol
it does move air. but with the car warming up to 180* the air never really gets any warmer!! i was told i may want to check my t-stat first to see if it is stuck open.... and i think this could be part of, or "the" problem because my car has NOT seen 185*+ in a LONG time.
anyone have any suggestions? never done a heater core before. heard they are lots of fun though!!! lol i am of course gonna check the stat first...much easier and cheaper!!!
thanks guys!!
it does move air. but with the car warming up to 180* the air never really gets any warmer!! i was told i may want to check my t-stat first to see if it is stuck open.... and i think this could be part of, or "the" problem because my car has NOT seen 185*+ in a LONG time.
anyone have any suggestions? never done a heater core before. heard they are lots of fun though!!! lol i am of course gonna check the stat first...much easier and cheaper!!!
thanks guys!!
Heater Core is pretty easy to change..
Usually when they go, they spill Coolant everywhere. Could be the Blower Motor isn't really working right, most likely the vents are not opening the way they should.
Usually when they go, they spill Coolant everywhere. Could be the Blower Motor isn't really working right, most likely the vents are not opening the way they should.
TECH Enthusiast
Joined: Jun 2002
Posts: 634
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From: In the garage fixing LT1
1) Check thermostat (just replace it, they're cheap)
2) Do jet flush on core to see if that works. If no, step 3.
3) Replace heater core. Make sure you also remove the A/C evaporator and clean the fins (use vacuum, brush). Reinstall everything. Enjoy heat.
2) Do jet flush on core to see if that works. If no, step 3.
3) Replace heater core. Make sure you also remove the A/C evaporator and clean the fins (use vacuum, brush). Reinstall everything. Enjoy heat.
Last edited by Speedy; Nov 10, 2007 at 07:24 AM.
Originally Posted by Speedy
1) Check thermostat (just replace it, they're cheap)
2) Do jet flush on core to see if that works. If no, step 3.
3) Replace heater core. Make sure you also remove the A/C condenser and clean the fins (use vacuum, brush). Reinstall everything. Enjoy heat.
2) Do jet flush on core to see if that works. If no, step 3.
3) Replace heater core. Make sure you also remove the A/C condenser and clean the fins (use vacuum, brush). Reinstall everything. Enjoy heat.
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
Yea mine sucks **** too. I assume I have a 160stat in mine, it only gets up to the first line on the gauge and I have ZERO heat. I wouldn't even call it lukewarm
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Also there are vacuum lines that move the actuators and a cable to move the door in between the AC evaporator and the Heater Core. if the cable or the actuators go you can have problems with your HVAC system
Teching In
Joined: Feb 2004
Posts: 3
Likes: 0
From: St. Louis
Does anybody have directions (diagrams) on how to change a heater core in our cars? Also does anybody have more info on that TSB mentioned by UnitZ28?
Nevermind...
Nevermind...
Last edited by wulfe13; Nov 27, 2006 at 05:14 PM.
Staging Lane
Joined: Nov 2006
Posts: 67
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From: Portland, OR
Autozone.com > repair info > repair guides > under chassis electrical
Couple of tips- Remove the hoses while the core is still bolted down then take a shop vac and suck out as much coolant as you can, this avoids a big mess inside. cut a couple pieces of cardboard and place them on both sides of the new core while your jimmying it back in to place, to aviod damaging the fins. Make sure you reuse the foam gaskets or replace them with something similar, basically seal around the sides of the core so air goes through it not around. It is tight in there and will require some wiggling but it's not as bad as many other cars.
Couple of tips- Remove the hoses while the core is still bolted down then take a shop vac and suck out as much coolant as you can, this avoids a big mess inside. cut a couple pieces of cardboard and place them on both sides of the new core while your jimmying it back in to place, to aviod damaging the fins. Make sure you reuse the foam gaskets or replace them with something similar, basically seal around the sides of the core so air goes through it not around. It is tight in there and will require some wiggling but it's not as bad as many other cars.
TECH Fanatic
Joined: Jan 2005
Posts: 1,162
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From: St. Augustine, FL
I have a 160 degree stat and never had issues with the heat. It blows plenty warm whenever needed. I dont know if you guys were saying that the low temp stat would be causing it or not.... if so, well, not in my car .
I'm sorry to interupt on your converstions but the unit that is in front of the heater core that you should remove is the evaporater core. It's what the cold compressed freon flows through in order to cool the A/C, I've seen them plugged up with hair to leaves from the trees to bugs.
I took that out, no problems there. I got 2-55 AC now..
The Heater Core is pretty easy, remove the little plastic Panel, the Glove Box, and start taking stuff apart. Just remember how to put it together.
The Heater Core is pretty easy, remove the little plastic Panel, the Glove Box, and start taking stuff apart. Just remember how to put it together.
TECH Enthusiast
Joined: Jun 2002
Posts: 634
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From: In the garage fixing LT1
Originally Posted by ZEX-Z
I'm sorry to interupt on your converstions but the unit that is in front of the heater core that you should remove is the evaporater core. It's what the cold compressed freon flows through in order to cool the A/C, I've seen them plugged up with hair to leaves from the trees to bugs.
I spent thanksgiving day fixing my heater, it never worked from the day I bought it (about 18 months). I pulled the hoses off the core and blew them out. The heater works great now.
Sara Lou
Sara Lou