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heater core

Forum: C3 HVAC, Fuel, Emissions, and Exhaust

16 Messages
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heater core

Posted: 4/9/07 5:45amMessage 1 of 16
m
mikeee
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Oviedo, FL - USA
Joined: 9/8/2006
Posts: 267
Vette(s): 1977 t-top
I don't know if I have a good heater core or not,but it is still 35 yrs. old.Is it a problem changing it out,or just a couple of hrs. work? 77 with air.
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heater core

Posted: 4/9/07 6:28amMessage 2 of 16
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22715
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
"Couple of hours?"
Sorry...that was just too funny!

If your car has A/C, it will take a bit longer than just a couple of hours, fer sher. With-out A/C, it's not as bad. Either way, it is probably at least a half-day job.
I would suggest a service manual for complete directions, as you will be dealing with a few vacuum lines, and cables connected to the plenum box. I'm sure others here have tackled this project, and will give some neat tips/tricks.

Joel Adams
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heater core

Posted: 4/9/07 9:32amMessage 3 of 16
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dwright
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Victor, NY - USA
Joined: 7/12/2004
Posts: 6842
Vette(s): 2004 Commemorative Edition Coupe, Auto w/HUD. 13K miles in 2015. Sold 1982 Red Coupe
You don't need a heater in FL. Connect the hoses that go to the heater core together and FORGITABUTIT!!!
 
Maybe blow the water out of the core too.
 
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heater core

Posted: 4/9/07 3:36pmMessage 4 of 16
x
xfire
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Saxonburg, PA - USA
Joined: 11/14/2003
Posts: 143
Vette(s): 1982 Black over red, doing a resto.
If it's not leaking, leave it alone!!!!! Changing it can lead to a total rebuild.
That's what happened to me.
 
LOL
 
Denny
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heater core

Posted: 4/9/07 4:03pmMessage 5 of 16
z
zgator
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Savannah, GA - USA
Joined: 1/20/2005
Posts: 936
Vette(s): 1982CE,32,000 and counting. (fast!!) 1981 Vette, black on black. ZZ4 (quick!!)
[QUOTE=xfire]If it's not leaking, leave it alone!!!!! Changing it can lead to a total rebuild.
That's what happened to me.
 
LOL
 
Denny
[/QUOTE] That is so true."while I'm in here I might as well" You have to choose your battles.LOLzgator2007-04-09 16:04:33
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heater core

Posted: 4/9/07 4:43pmMessage 6 of 16
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xfire
Former Member
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Saxonburg, PA - USA
Joined: 11/14/2003
Posts: 143
Vette(s): 1982 Black over red, doing a resto.
It's amazing how much stuff you can find wrong, under the dash and around the engine, when you replace a heater core.
 
If you replace it, get a reseal kit, bought mine from Doctor Rebuild.
 
If your valve covers are leaking, this is the time to fix that. I found it easy the remove the heater box without the cover in the way.
 
See? One thing will lead to another.
 
Just remember, this is fun, and you can say, "I did it myself"!!
 
Denny
 
Big%20smile
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heater core

Posted: 4/9/07 6:16pmMessage 7 of 16
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lukesvette
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HOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
Heat is overrated!!! Rolling%20On%20The%20Floor%20Laughing  The heater core for me is one of the "if it aint broke, don't mess with it" parts.... Big%20smileLukesVette2007-04-09 18:17:56

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heater core

Posted: 4/9/07 8:23pmMessage 8 of 16
G
Greg78SA
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Saginaw, MI - USA
Joined: 9/22/2006
Posts: 146
Vette(s): 1978 Silver Anniversary... Almost all original/correct L48 auto,59k miles, oyster.
heat, HEAT? 
 
We don't need no stinkin HEAT!Rolling%20On%20The%20Floor%20Laughing
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heater core

Posted: 4/10/07 3:43amMessage 9 of 16
m
mikeee
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Oviedo, FL - USA
Joined: 9/8/2006
Posts: 267
Vette(s): 1977 t-top
Before I get off my sss and investigate a book or two,is the core worked on from engine or interior side? No motor in car,no interior in car,no hood on car.
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heater core

Posted: 4/10/07 4:55amMessage 10 of 16
K
KeBo
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Kendall Park, NJ - USA
Joined: 3/9/2005
Posts: 789
Vette(s): 1981 - 59 Beige over Cinnebar leather. Edlebrock top end, 2200 stall w/shift kit, 3:55s, Mufflex maniback exhaust, nice stereo, 16 in AREs w/BFGs
FUGGEDABOUWDIT! My core was leaking, my buddies 75 was leaking..  We started on his car WHAT A PITA!  My car, we just bypassed it..  I'll never use the heater anyway..
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