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Topic: Heater Core

in Forum: C3 Cooling and Heating Systems

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Heater Core (6/16)
2/3/08 4:44pm

ossw1
Former Member
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Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

Joined: 4/2/2005
Posts: 484

Hey I took the pad dash off and looks like I have to take the gage panel also. I tryed posting pictures and screwed that up. It looks more involved then just the dash pad.

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Heater Core (7/16)
2/4/08 12:13am

Ten15
Former Member
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East Hanover, NJ - USA

Vette(s):
'68 Black Conv. Matching 327/300 4 Spd. P/S, P/B, P/W, Tele, A/C

Joined: 9/25/2004
Posts: 525

Dave,

You're right, the center gauges have to come out also.

Anthony

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Heater Core (8/16)
2/4/08 1:58am

Norsky

Lifetime Member
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Burke, VT - USA

Vette(s):
SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
SOLD - "Betty" - '28 Ford Model A Tudor
Still have - "BLKBRRD" - '78 Pontiac Trans Am

Joined: 1/23/2002
Posts: 7191

Check this out (click here) for a look at replacing the heater core in a '70. This was in an old thread (found using the Search function) and posted by a former member.

______________

Jim Olson

"The Toys"...!!! Save the Wave!

Where I've been in a Corvette...!!!

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Heater Core (9/16)
2/4/08 12:07pm

ossw1
Former Member
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Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

Joined: 4/2/2005
Posts: 484

Hey thats a good thread to have thanks. To take the Evaporator and blower housing from the engine bay are there bolts from inside the car to undo?

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Heater Core (10/16)
2/4/08 12:56pm

Norsky

To be honest I don't know. I don't have A/C on "The Toy" so I'd have to look at the AIM to see the detail.

______________

Jim Olson

"The Toys"...!!! Save the Wave!

Where I've been in a Corvette...!!!

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Heater Core (11/16)
2/4/08 7:11pm

sgm2004
Former Member
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Falls Church, VA - USA

Vette(s):
1975, 4 speed, L48, NOW Silver mist, Oxblood inside 2003 50th Av Torch RED little brother to 75

Joined: 3/22/2006
Posts: 232

Norsky, great thread wish I would have had it when I replaced mine. Would have been a lot less cuts and grey hair. Thanks

Guy

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Heater Core (12/16)
2/4/08 8:29pm

Ten15
Former Member
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East Hanover, NJ - USA

Vette(s):
'68 Black Conv. Matching 327/300 4 Spd. P/S, P/B, P/W, Tele, A/C

Joined: 9/25/2004
Posts: 525

Dave,

In looking at some of my teardown pics, I took my evaporator housing out with the heater box & interior in tact.

If I remember correctly, the evap box mounts onto studs on the firewall (1 came from the heater box) & it was held on with speed nuts. I don't remember if some of the studs were the bolts that held the heater box or not.

Good luck,

Anthony

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Heater Core (13/16)
2/5/08 12:26am

ossw1
Former Member
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Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

Joined: 4/2/2005
Posts: 484

Looking from the engine bay there is good size screw on the lower right hand corner. That looks like it unscrew from the inside. I wondering if I should go any deeper with it? Something tells me do it now. I need to put my gas tank back in before I take this on. I hate have to many things apart. Starting in march the vette goes to the shop for the engine install so the heater core has to be done.

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Heater Core (14/16)
2/12/08 6:47pm

ossw1
Former Member
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Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

Joined: 4/2/2005
Posts: 484

OK I have four bolts out is there a 5 one? The box will not come out. The center dash vent is still there does this have to come out? There are a lot of cables on the driver side of this I dont really want to mess with that.

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Heater Core (15/16)
2/12/08 7:28pm

ossw1
Former Member
Send Private Message

Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

Joined: 4/2/2005
Posts: 484

There seems to be a nut in between the AC box and back of the firewall> It looks like I have to take the AC box off to get to that one nut. Is that the case. The nut is the upper left one facing the box from inside the car. Is this a another Buba job? Angry

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Heater Core (16/16)
2/18/08 1:01pm

ossw1
Former Member
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Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

Joined: 4/2/2005
Posts: 484

Here is a update. In my car you can not take out the heater box without taking off the evaporator box in the engine bay. Is that normal for all AC 70 Vetts? So the heater core looks like it had a small leak which might explain why there was a cut off valve switch on the heater hose. I spent a good amount time cleaning up the heater box. I order a heater core from Napa and today I will order the Heater box gaskets. I did take enough pictures I hope I can put this back in.

My plan for the evaporator is clean it up and just replace the outside pieces and check to see if the blower motor is good. It does not look like a good idea to open evaporator box. Is that the case?

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