I think the expansion tank goes between the water pump and the heater core on the 3/4" line.
Then the intake connects to the lower (5/8") heater core connector.
then here is the tough question. if I want to shut off the heater core should I use a bypass valve rather than a shutoff valve? wouldnt I need to place it between the heater core and the expansion tank?
Vette(s): 1969 convertible L71 427/435 4-speed black interior
Joined: 9/8/2003
Posts: 3398
I don't know if we're talking about the same thing...to me the expansion tank is for the radiator, not between the water pump and the heater core.
If you want to shut off the heater core, all you really need to do is take the heater hose and run it from the inlet to the outlet on the water pump. You can use a 3/4" to 5/8" adapter for that. It removes the heater core and valve out of the system altogether. I'm not sure if that's what you want to do, though.
|UPDATED|2/3/2012 7:43:41 AM (AZT)|/UPDATED|
____________________________________
Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, c o c k y and in general a malcontent.
Click image for larger pic
the expansion tank is part of the cooling system. is is connedted via hose in between either the heater core and intake or heater core and water pump.
i know i can just disconnect a host and bypass it. but there is not alot of room and id rather not have to fight the hoses of the heater core every year to do it.
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
Joined: 11/8/2003
Posts: 19449
On this tank, the two lower fittings would be tied into
one of the heater hoses. The upper fitting on the tank close to the neck would have a hose coming
from the radiator, and the other fitting(on the neck itself) would have the hose going to the ground.
At least, this is how I unnerstand it to be....
____________________________________ Joel Adams C3VR Lifetime Member #56 My Link
Adams' Apple said: On this tank, the two lower fittings would be tied into one of the heater hoses. The upper fitting on the tank close to the neck would have a hose coming from the radiator, and the other fitting(on the neck itself) would have the hose going to the ground. At least, this is how I unnerstand it to be....
yep
the question I am trying to answer is which heater hose.
Vette(s): 1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion
Joined: 10/14/2003
Posts: 1152
I have a couple of drawings for 69 to 72 expansion tanks and they show the tank inline with the hose from water pump to heater core. if you pm me with you email I will send you what I have
I asked the same question Feb. 2011. I never got the answer to which hose went to the bottom of the Expansion tank, or does it make any difference. If you find out please let me know. I still haven't installed it on my 68.
Corvette is a registered trademark of the General Motors Corporation(GM) &
Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise
noted) and does not claim or imply that Chevrolet or
GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated
with, sponsored or supported by GM. Copyright/trademark/sales mark
infringements are not intended, or implied and are in fact used to support
GM, Chevrolet and Corvette.
Official C3 Vette Registry content is Copyright 2001-2017, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS
Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982
30
