63bob
Senior Member
Posts: 420
Loc: WA
Reg: 02-02-01
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01-29-23 05:43 PM - Post#2853897
I have a 400 small block with an Aluminum Edelbrock water pump in a 63 Impala. The heater now blows but just warm air. On the original build had had the original copper core rodded and it worked fine. I took it out and replaced it with a new one. The water flow on both seemed good when I had them both out. The new core produced the same result. I believe that on a 63 Impala the heater core water circulates constantly, and you just open a control door to let the air blow through it. Could it be possible that the water pump is not flowing enough hot water to it? Or do I not understand how the heater or water pump operates? Help Please I am cold!
1963bob
63 Impala SS Convert 4spd, 3:70 Posi, 377ci-AFR180 Heads-Comp 276HR-6"rods-10.3:1
Currently: Started engine 04-15-11, after 14-year restoration. Finally on the Street Summer of 2011 |
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kingkreeton
Frequent Contributor
Posts: 1787
Loc: Houston TX
Reg: 04-15-11
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01-30-23 04:10 AM - Post#2853906
In response to 63bob
I had the same issue once and found my heater hoses were installed incorrectly. Ensure you have hot (not radiator cooled) water going into the heater core. Once I realized that and reversed it, the hot air was plentiful.
Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie
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 Magnetocheck
"2nd Year" Silver Supporting Member
Posts: 522
Age: 69
Loc: Charlotte, NC, USA
Reg: 09-05-22
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 01-30-23 04:34 AM - Post#2853907
In response to kingkreeton
Check the thermostat as well if old. Could be stuck open (or worse, installed backwards -- hey it happens)
Bob
'65 Impala SS 396 Convertible
Member, National Impala Association |
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327
Contributor
Posts: 475
Age: 63
Loc: Ontario , Canada
Reg: 02-09-21
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01-30-23 07:17 AM - Post#2853912
In response to kingkreeton
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kingkreeton
Frequent Contributor
Posts: 1787
Loc: Houston TX
Reg: 04-15-11
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01-31-23 08:11 PM - Post#2853976
In response to 63bob
Did you get it figured out?
Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie
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 jinxy
"3rd Year" Silver Supporting Member
Posts: 20
Reg: 03-21-22
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02-05-23 07:02 PM - Post#2854169
In response to 63bob
I assume there is no water control valve. Are both hoses nice and hot when warmed up? If none are warm suggest thermostat, if o
nly one that suggests a blockage or improper flow. Good luck
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