C3 Vette Registry - The Best Resource on the Net for C3 Vettes! C3 Vette
Forums -> C3 Cooling and Heating Systems
Not Logged In! Login or Register!  Users Online: 24 / Help 
Features  Find C3 Parts on ebay in only 2 or 3 clicks!  | Add YOUR C3 to the Registry

Supporting Vendors
Bair's Corvettes
Volunteer Vette Products
Mid America Motorworks
VetteBookStore.com
CorvetteClothing.com

C3 of the Month
None Current
Enter Yours Today!
Online C3 Show
13
C3s are Registered

Vanity Plates
GR82BME
twardell
Featured Links

Buy Now
The Corvette Factories: Building America's Sports Car (Hardcover)
The Corvette Factories: Building America's Sports Car (Hardcover)


Motor Trend - $5 for 12 issues.
Motor Trend
Only $5 for 12 issues.


Corvette: America's Sports Car Yesterday, Today, Tomorrow (Hardcover)
Corvette: America's Sports Car Yesterday, Today, Tomorrow (Hardcover)


Corvette Masterpieces: Dream Cars You'd Love to Own (Hardcover)
Corvette Masterpieces: Dream Cars You'd Love to Own (Hardcover)



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
2/2/12 11:49pm - Original Message: 'Expansion tank question'
cthulhu Lifetime Member
Lifetime Member
- Send Private Message


Hot Springs, AR - USA

Vette(s):
69 Conv #'s Match 427, TKO-600, 3.36HD-Posi, T/T, PS, PB, PW, SP, Lthr, Comp Mag 270 & Pro Rlr Rockers, Edel Air-Gap RPM, BG SD 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Hly Bl Fuel Pump, K&N, Jet-Hot Hkr Side-Pipes,Steeroids, Al Rad, Spal Fans

Joined: 4/24/2004
Posts: 3194

I just want to make sure I am doing this right.

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?
 Reply Reply  Quote Reply w/Quote
 
Support C3VR!
Suport our advertisers
2/3/12 9:43am - Reply: 'Re: Expansion tank question'
Gunslinger
Former Member
- Send Private Message


Frederick, MD - USA

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
 Reply Reply  Quote Reply w/Quote
2/3/12 1:13pm - Reply: 'Re: Expansion tank question'
cthulhu Lifetime Member
Lifetime Member
- Send Private Message


Hot Springs, AR - USA

Vette(s):
69 Conv #'s Match 427, TKO-600, 3.36HD-Posi, T/T, PS, PB, PW, SP, Lthr, Comp Mag 270 & Pro Rlr Rockers, Edel Air-Gap RPM, BG SD 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Hly Bl Fuel Pump, K&N, Jet-Hot Hkr Side-Pipes,Steeroids, Al Rad, Spal Fans

Joined: 4/24/2004
Posts: 3194
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.
 
 


____________________________________
http://www.vetteprojects.com/bmv
 Reply Reply  Quote Reply w/Quote
2/3/12 5:11pm - Reply: 'Re: Expansion tank question'
yostusota
Former Member
- Send Private Message


York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

Joined: 5/18/2010
Posts: 1518
Well.. I don't have one.. I don't think you have to either.. They do look cool though.

____________________________________

My first parade at Carlisle 2010
 Reply Reply  Quote Reply w/Quote
2/4/12 12:10am - Reply: 'Re: Expansion tank question'
cthulhu Lifetime Member
Lifetime Member
- Send Private Message


Hot Springs, AR - USA

Vette(s):
69 Conv #'s Match 427, TKO-600, 3.36HD-Posi, T/T, PS, PB, PW, SP, Lthr, Comp Mag 270 & Pro Rlr Rockers, Edel Air-Gap RPM, BG SD 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Hly Bl Fuel Pump, K&N, Jet-Hot Hkr Side-Pipes,Steeroids, Al Rad, Spal Fans

Joined: 4/24/2004
Posts: 3194
I plan to leave it in. First and foremost i just need to verify that it goes on the 3/4 side
 
 
can someone who has a car with expansion tank intact tell me if it is in between the waterpump and core or intake and core?


|UPDATED|2/3/2012 10:10:23 PM (AZT)|/UPDATED|


____________________________________
http://www.vetteprojects.com/bmv
 Reply Reply  Quote Reply w/Quote
2/4/12 10:55am - Reply: 'Re: Expansion tank question'
Adams' Apple Lifetime Member
Lifetime Member
Moderator
- Send Private Message


Duncanville, TX - USA

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: 19457
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


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
 Reply Reply  Quote Reply w/Quote
2/4/12 4:10pm - Reply: 'Re: Expansion tank question'
cthulhu Lifetime Member
Lifetime Member
- Send Private Message


Hot Springs, AR - USA

Vette(s):
69 Conv #'s Match 427, TKO-600, 3.36HD-Posi, T/T, PS, PB, PW, SP, Lthr, Comp Mag 270 & Pro Rlr Rockers, Edel Air-Gap RPM, BG SD 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Hly Bl Fuel Pump, K&N, Jet-Hot Hkr Side-Pipes,Steeroids, Al Rad, Spal Fans

Joined: 4/24/2004
Posts: 3194
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.
 
the 3/4" line between the core and water pump
 
or
 
the 5/8 line between the core and intake.
 

 


____________________________________
http://www.vetteprojects.com/bmv
 Reply Reply  Quote Reply w/Quote
2/4/12 4:57pm - Reply: 'Re: Expansion tank question'
rraider1
Former Member
- Send Private Message


Woodland, WA - USA

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

____________________________________
Bob R
 Reply Reply  Quote Reply w/Quote
4/5/12 7:18pm - Reply: 'Re: Expansion tank question'
rlu1968
Standard Member
- Send Private Message


Gordonvillle, TX - USA

Vette(s):
1968 Roadster 427

Joined: 11/28/2003
Posts: 222
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.

____________________________________

 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
 Forums -> C3 Cooling and Heating Systems
(Moderator: Adam Wartell, Norsky, Adams' Apple)
 

 
Official C3 Vette Registry Community:
Home | Forums | Email | Who's Online | Clubs | Events | Member Stats

Other Official C3 Vette Registry Areas:
Members | Research | Shop | My Account | About C3VR
 

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