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heater core removal

I just changed mine this winter, not too difficult of a job.
-Drain the radiator
From inside engine comp. remove the nuts around the blower motor holding it to the fire wall and disconnect radiator hoses from firewall
From inside the vehicle remove the glove compartment door and cardboard compartment itself, for access.
Remove the screws holding the heater distributor bracket to the dash
Detach speed nuts holding the heater assembly to the dash and lower it to the floor
Disconnect all cable connections, wire connecter and defroster hoses
Remove assembly from vehicle
Remove screws holding cover to heater
Remove core mounting screws and core from the heater
Its a good idea to lubricate all the door flap hinges while you have it apart.
Most of this was taken from Chiltons repair manual
 

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Just my 2 cents, but I would suggest spending the money on a seal kit while it's out. If you do this, also pick up a box of strip caulk (dum dum) to seal all the exterior leaks of the unit.

Tim
 

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Cdn67 said:
Just my 2 cents, but I would suggest spending the money on a seal kit while it's out. If you do this, also pick up a box of strip caulk (dum dum) to seal all the exterior leaks of the unit.

Tim
what is the advantage of using strip caulk over the typical blue silicone gasket maker?
 

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FunkyNova66 said:
Can you use clear silicon for a sealer>

Do most parts stores carry strip caulk?

I'll be replacing my heater core within the next few days.
I used black silicon sealer for my heaterbox and everything looks/works great. I also replaced all the gaskets in there too.
 
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Silicone sealer is for bath tubs , and will make a mess . Use the DUM DUM
 

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novacars said:
Silicone sealer is for bath tubs , and will make a mess . Use the DUM DUM
no mess at all and i could easily control the volume/thickness of the bead where necessary. no doubt GM would have used silicon sealer back in the day if it were available!
 

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Most stores that might carry mix of body shop stuff will also either have in stock or can order the strip caulk. I used it, but in hindsight, I probably saved the bucks and just used a tube of silicone laying on my bench. You also need to consider maybe insulating your doors in the box while you have it out. I followed Johnny's advice and cut up some old mouse pads and used spray adhesive to glue them on, they're a nice weight. Painted my box while it was out too.
Brett.
 

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Yep the heater boxes are basically the same. Its a good Idea to replace the foam while it's out. NNN has a kit of the pieces if you don't want the mouse pad route. I didn't bother to use sealer on the box when I put it back together. It is messy (either the silocone or Dum-Dum), and I don't see that a small amount of air leakage at the flanges of the heater box is much of a deal.
 

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I used Silcone as well, but haven't "tested" the results yet...

I think the worst part was sandblasting every nook and cranny of the thing !!
(especially when it is not one of those "Ohhh, Ahhhh Parts")



-Brent Thomas
Ohio
 

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looks real nice Brent. you're right it isn't a glamorous part but when you are all done you'll know you've done the right thing for the car and yourself!
 

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What the $#@^&*??

What's a heater....... you girly-man???? I have a like new one (43,000 orig miles) and don't know what to do with it?? I may put it back in the Cloner when I sell it???

Bogie
 

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BTHOMAS67Wagon said:
I think the worst part was sandblasting every nook and cranny of the thing !! (especially when it is not one of those "Ohhh, Ahhhh Parts")
I had similar thoughts when I was started having mine done (it's still in limbo, waiting for chassis completion). I had the tank and distribution block blasted and powdercoated. It would have driven me nuts to know that with as much time and effort as I spent on everything else, that I didn't give the same time and attention to a component mostly, but not entirely, hidden under the dash.

The part of the heater tank that hangs under the dash would drive me nuts if it weren't as pretty as everything else in the car is hopefully going to be.

With a bit of polish before mounting, they'll look great and last FOREVER! :D Hey Bogus, it take a real man to take the time to hook the heater back up and admit it might be nice to use occasionally. :p

 

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I was going to do a quick Step by Step about rebuilding the Heater Core, but got bored with it and never finished. It was a fun little weekend or so project.

Brent Thomas
Ohio
 
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