Need help replacing heater core

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Need help replacing heater core

Postby h-bot » Thu Dec 28, 2000 5:55 pm

From: tjv1974_REMOVE_781141_THIS_@yahoo.com


I have a 77 Vega with A/C, all stock, and need to
replace the heater core. It was leaking coolant from
behind the front right wheel and all hoses were fine.
Any advice?? How hard is it? How long will it take?
Do I need any special tools or other parts. I have a
spare heater core ready to go in. I've never done it
before and my brother told me "Good Luck". Needless to
say, he's done it before. Any advice would be
appreciated.


[This is message #37 by user tjv1974 on Yahoo! Club GM H Body 4: http://clubs.yahoo.com/clubs/gmhbody4 ]
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Need help replacing heater core

Postby h-bot » Fri Dec 29, 2000 1:31 am

From: f_vega2000_REMOVE_763039_THIS_@yahoo.com


Replacing the heater core isn't to bad you have
remove the instrument panel bezel and there is 2 screws
right above the heater control panel remove them and
there is 2 screws under the ash tray remove these and
push the controls back in the dash . You also need to
take the defrost duct lose, should be one bolt going
trough it into the heaterbox.There is also a 7/16 bolt
in the right lower corner of the heaterbox remove
it.You need to go under the hood and disconnect the
heater hoses ,it gets a little tricky here,i found out
that a 1/4 in. rachet and a 5/16 socket works best
here,its still tight though.Look on the side of the blower
motor ther is two 1/2 bolts remove these bolts and
there is two 1/4 in.nuts next to the engine remove them
you now be able to pull the blower assembly away from
the firewall. You should be able to go inside and
pull the heater box out, make sure you unplug the
wires from the fan switch when you pull the heater box
out.Once you get the heater box out flip it over where the
heater core inlet and outlet are sticking out there
sould be 4 1/4 in screws remove them and pull the
heater core out , flip it over and take the screws out
of the straps that hold the heater core in . I done
it a few times to my 76 so it's not to bad.If you
need any more help get in touch with me or send me a
message i'm on line most of the time my id is f_vega2000
my name is Chris.


[This is message #38 by user f_vega2000 on Yahoo! Club GM H Body 4: http://clubs.yahoo.com/clubs/gmhbody4 ]
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Need help replacing heater core

Postby h-bot » Mon Jan 29, 2001 10:19 am

From: tjv1974_REMOVE_570939_THIS_@yahoo.com


Well everyone. Didn't need to change the core
after all. After carefully inspecting the problem,the
bracket on the lower hose going into the fire panel was
badly rusted and loose. It was so loose I pulled the
hose off by hand! So, I went and bought a 75 cent
bracket and put it on. It took me an hour though because
the A/C unit is right in the way. After jacking the
car up and reaching up through the engine compartment
I was able to tighten the new bracket with a stubby
screwdriver. I had to do it all by "feel" and it was very
difficult and very tight. Good luck changing those heater
hoses at the firewall if you have A/C. I count my
blessings though-it beats changing the core, and it's a lot
cheaper! I like 75 cent repairs.


[This is message #44 by user tjv1974 on Yahoo! Club GM H Body 4: http://clubs.yahoo.com/clubs/gmhbody4 ]
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