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Re: CHANGE HEATER CORE IN A 1989 CHEVY S-10 P/U
Under the dash. the dash will have to come out and the steering column will have to be droped down. your local parts store will have a book on your vehicle that will give you detailed instructions to help you
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first make sure that the hoses that hook to the heater core arent loose or that the clamps are tight.an there is no leaking there where they hook up. im not sure if yours is under the dash or if its on the fire wall under the hood. but if its under the hood you will see which way to go by following the two hoses that go to it. hope this helps you out.best of luck. hope its just a hose or clamp.
Well first, if your talking about the radiator hoses when you say the bottom hose is warm and the top is cold, that would suggest to me a stuck thermostat. If not, then the heater core is located inside the truck under the dash. You can follow the heater hoses under the hood to the firewall and that will tell you where, under the dash the core is located. It is kind of a big job, as all the under dash covers will need to come out as well as the glove box. The heater core is inside the heater box, a black plastic box that will also need to be removed. It is important to note that when you are reinstalling the heater box after you change the core, it must be completely sealed, either with RTV or two sided insulating tape.
No you do not, I think you mean the heater core, because its leaking, first unhook heaters hoses under hood (there may be a clamp on the core tubes that has to come off), next go under dash on passengers side, take the one bolt to the far right under dash by the dome light, thats so you can pull the dash out just enought to get the cover off the front of the heater box, behind that cover is the heater core, now that cover is held on with about 6 1/4 inch screws give or take 1 or 2 when you get the cover off you will see 2 straps, one on each end that hold the core in place, there are 2 1/4 screws in each one, remove them and core will come out. Put back together in reverse order.
As with all vehicles it seems the first part that they build around is the heater core. It is under the dash above the floor housed in a black plastic sealed box. Sealed with goop. Locate that box and start removing everything around it that is peventing taking the cover off. Of course disconnect the heater hoses under the hood a thefirewall.
you can find the heater core of any car by following to heater hoses from under the hood they will meet at the same point on your firewall (wall seperating the inside compartment from hood compartment) If they meet at a box under the hood passengers side firewall then the core is under the hood if those 2 hoses meet and just go into the car from under the hood your core is under your dash at the location the hose go into the car. Your core is directly attached to those 1" hoses (black) 2 of them.
My chilton manual said take apart the whole truck, take dash out, take breather assembly apart, take antenna off, take kicker panel off etc. All that is wrong, theres a black compartment door inside cab on passenger side, take 6 to 8 screws out, unhook hoses from under hood, it slides right out.