Problem Heater Core

[joe14]

For time posting a thread. New to this forum just wanted to ask if anybody know how to take a heater core out or whats the procedure i have to do to replace it. It is a 85 chevy pickup

[vern350]

Remove the black box underneath the dash on the pass. side. May be a bolt or two to undo in the engine bay. Drain the engine coolant. Remove the heater hoses. Blow on one of the hoses to drain any fluid in the heater core so its doesnt end up in your cab. There also may be a some linkages on the box for the damper that need to be undone. It may be helpful to take the glovebox out, not sure if its necessary, its been awhile since i've tackled this. I'm sure someone else will chip in.

[joe14]

thks vern well i also read that in other forums that i well have to take the fender well to get to those bolts off i dont know i have never done this before

[joe14]

a friend of mine also gave me that black box with the heater core inside but cannot figure out how to take the heater core out of the black box i took all the screws but will not come off any ideas or when i buy the heater core does if come with that black box already screw inside

[87c10slammer]

nah it is just hald tight by some adhesive sealer inside.. if you pry on it it should pop open... if i dont kno what im doing i go to the local pick a part and find one that is intacked and try to pull it.. sometimes it is alot easier to do it this way cause you know where the screws and stuff are and what you have to look forward to breaking on your truck

[joe14]

87 so just try to pry it until it pops open i got one more question so how many screws are inside to and do i have to take the fender well off to get to the outside bolts. Because the one my friend gave does have two bolts on the bottom of the black box. But looking in the engine bay looks like i will have to take it off

[dswancutt]

I am right in the middle of a heater core replacement project on my 78. Pull the glove box so you can remove the control calbe. Not sure if the box is the same on an 85, but you have to line up the control lever with the slot to get the core and the panel it's mounted to to slide up. Mine is an AC truck, not sure about non AC or like I said, if the 85 is the same.

[asphaltburner]

Yo! The heater box should split into two parts with the core inside. My '78s' heater core is held in the heater box with two heavy wire loops and screws. Remove the four screws, the wire retainers lift out, and the heater core comes free. Unsure about the '85 design, but I'll bet this might help,...certainly possible that it's fixed in place with adhesive, but check it carefully once exposed.
Todd.

[Blazer Eagle]

i did the heater core replacement on my 74, i had heard you have to take out the inner fender but on mine there werent any bolts down there so i dont, maybe its an ac non/ac thing i dont know

[joe14]

mine is also an AC. Well that will be task that I will have to tackle once the climate gets warmer thks for the input guys