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CorvettesHeater
Core Bypass pics??

rmadlem
Senior
Member

874 posts [100%]
Beautiful Grand Rapids
MI

Heater Core Bypass
pics??

5:39
AM 6/13/2002

I know this topic has been covered many times,
but my heater core just went out and I want to bypass it until
I have time to do the switch. (I have A/C)
Does anyone have pics of the shut-off
valves installed on the hoses? I think I might be imagining a
much more difficult job than what it really is, and just want
to be sure. I've also heard many different valves that have
been used....most though that I've seen have been ball valves
from Home Depot.....is this a good way to go or does anyone
have other opinions.
Thanks for your help !!
_______

'81 Torch Red with Camel interior

77-4speed
Junior
Member

22
posts [100%]
Houston Tx

Re: Heater Core
Bypass pics?? (rmadlem)

6:01
AM 6/13/2002

I can tell you what I did.

I went to home depot and bought the following:

-about a foot of 5/8 in automotive heater hose
-5/8 in
ball valve with long red handle
-(2) 5/8 in male rubber
hose fittings. These fittings are about 2 in long and have
ribs on one side that the rubber hose slips over and a 5/8 in
male thread on the other side.
-teflon tape

I only used about 4 in of the heater hose for the project.

I removed the cars heater hose from the existing shut off
valve near the passenger fender well. I installed one of the
hose fittings in this heater hose and clamped it in place. I
then used teflon tape on the male side of the fitting and
screwed the ball valve in place.

Next I cut about 4 in of the new heater hose and installed
a fitting in one side of it, again, clamping in place. I used
teflon tape on the male side of the fitting and then screwed
it into the ball valve I had previously installed in the car.

Finally I attached the new hose to the old heater valve on
the passenger fender well and clamped it in place.

I chose this setup because I can flip the valve shut in
summer or leave it open in winter. And, by not removing the
old valve which is vacuum controlled, if it is cold outside
and I have the shut off valve open, but for some reason I need
to run the A/C, the original valve under vacuum control will
still shut off the flow to the heater core.

Sorry I don't have any pics but I don't have a digital
camera yet. I know, I know.......

Russ

kgraumann
Senior
Member

151 posts [100%]
Granite OK

Re: Heater Core
Bypass pics?? (rmadlem)

8:05
AM 6/13/2002

This is what I did.

I went down to the local auto parts store. Autozone, etc,
etc.

I asked for a Heater valve cutoff. They asked me what size
I wanted, either a 5/8 or 3/4. I went with the 3/4, as they
said I didn't need to cut off both. I cut the 3/4 directly in
the middle coming from the engine to the heater core and
spliced it in with 3/4 gates clamps.

All in all, it cost me $11.00 to do this.

It varys where you want to put it, I put it where it was
hidden but still accessible for me to turn off and
on.
_______

Kev
1980 Black/Doeskin-ZZ4 355HP,
4-Speed Borg-Warner Trans.

Fevre
Senior
Member

1302
posts [100%]
Ann Arbor MI

Re: Heater Core
Bypass pics?? (rmadlem)

8:14
AM 6/13/2002

Just remove the two hose and put a platic
connector in the middle. Not sure if they make one to reduce
it for the two different size hoses. Any one who is using a
shut of might want to open it up once a month in the summer so
it get some fresh fluid in there to flush it out. Image how
much gunk will build up in the heater core sitting unflushed
for 4 to 8 months.
_______

73 ragtop, temporary
350, 4 spd, MSD 6A, ProBillet Dist, Holley 4150 600 with vac
sec, Aluminum Trick Flow 23 dgr heads (waiting in the wings),
Weiand Stealth intake, 3.70 rear, Two Boxers (1 male & 1
female) and no money

77-4speed
Junior
Member

22
posts [100%]
Houston Tx

Re: Heater Core
Bypass pics?? (Fevre)

8:16
AM 6/13/2002

kgraumann,

I didn't want to cut the original heater hose in case
someone later down the road wants to do the NCRS thing. This
way I get to keep the hose in tact and still have the bypass.
I think my total was about $12-$15.

Russ

vettfixr
Senior
Member

1830 posts [100%]
Sewell NJ

Re: Heater Core
Bypass pics?? (77-4speed)

8:51
AM 6/13/2002

Just remove the hoses and get some caps from
Pep Boys or Autozone. They go over the nipples and are held on
with hose clamps. You can then take your heater hoses
completely off.
_______

Knowledge gained and not
shared, is knowledge lost.

vettfixr
74 L-48 T-Top
More Enhancements
than Pamela Anderson Lee
5 Coats DuPont Diamond Black
Acrylic Lacquer
5 Coats DuPont 380-S clear Acrylic
Lacquer
Sewell,NJ
Vettfixr's Home Page

Black Sheep Squadron

The Dude
Senior
Member

4765 posts [100%]
O.C. Calif.

Re: Heater Core
Bypass pics?? (rmadlem)

10:59
AM 6/13/2002

Yep. Just remove the hoses completely and
install plugs in your manifold and water pump in place of the
nipples.
_______

BB wowbagger
Senior
Member

185 posts [100%]
STHLM/sweden

Re: Heater Core
Bypass pics?? (The Dude)

11:25
AM 6/13/2002

My car had originally AC but one of the
previous owner removed it.When i bought it i couldnt get it to
stop blowing hot air in to the car.So i got me a Vacuum
assisted cut of valve and installed it to one of the heater
hoses,and connected the vacuum hose with a t to the "Defrost"
actuator under the dash.So if i need some heat to defogg my
windshield i just put it in "def" and Voila,hot air.When i pu
in any of the other locations"Bilevel"heat",i get just
nice,cold engine fumes in to the car
_______

I dont know the
question,but the answer is BIGBLOCK
"It pulls like a raped
ape"

Ken73
Cruise-In III
Veteran

1846 posts [100%]
aka Mr. Momma

Re: Heater Core
Bypass pics?? (rmadlem)

12:11
PM 6/13/2002

Here's what I did;

I put my valves underneath so you can't see them from the
top. I used these parts:

to make this assembly:

Now I can turn off both sides of the heater, and disconnect
and totally drain the heater core so there is NO heat transfer
to it during the summer. When winter comes, I simply reach up
under and open the two valves, and put a little extra coolant
in.

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