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4/17/09 4:06pm - Original Message: '1972 Expansion Tank'
BlueX2 Lifetime Member
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So here's a really stupid question.....where's the expansion tank on a 72' with air conditioning??  Embarrassed  Yeah, I know, quit laughing.  Tongue

Let me explain.  My car has been away since last June, when I turned it over to get painted.  (Long story which I will relate in detail when the first coat of blue goes on next month.)  Anyway, I can't remember seeing the expansion tank on the car.  I've looked in a book, the Corvette 1968-1982 Restoration Guide, and on pages 100 and 101 they show a 72' LS5 engine and the tank is up high, to the left of the air cleaner.  I have pictures of my engine, and it's not there.  I Googled some pictures of 72's with air and I don't see the tank in that spot either.  

Were they placed in a different spot in cars with air?  Different place for big block or small block?  

Since I can't run out to my car and look, any help will be appreciated.  Thanks!!  Thumbs Up
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4/17/09 10:13pm - Reply: '1972 Expansion Tank'
kstyer Lifetime Member
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CUYAHOGA FALLS, OH - USA

Vette(s):
1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!

Joined: 12/2/2003
Posts: 6410
Look in the right fender, tucked under the fiberglass.     And yes, many big block cars use a metallac can for a tank, and the small block cars used a plastic tank.    Usually.

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4/18/09 9:30am - Reply: '1972 Expansion Tank'
bio11
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Oklahoma City, OK - USA

Vette(s):
1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

Joined: 4/1/2007
Posts: 432
My 72 LS5 has the small metal tank up under the passenger side fender. Mine is an AC car. I think there may have even been a differance between AC and non AC cars.

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4/18/09 10:23am - Reply: '1972 Expansion Tank'
BlueX2 Lifetime Member
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Thanks for the info guys.  I'll check there the next time I see the car.  

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Bryan

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4/18/09 11:24am - Reply: '1972 Expansion Tank'
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
69 - 72 big block cars with air conditioning used the long narrow brass looking tank mounted under the right fender so that only the filler is easily visible.  Original tanks are hard to find, but they are now selling a serviceable replacement that looks fairly correct.

Larry


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4/18/09 11:40am - Reply: '1972 Expansion Tank'
BlueX2 Lifetime Member
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Thanks for the info Larry.  I saw that tank online and wondered what it was.  

My car is a small block with air conditioning.  Did my car have the smaller metal tank?


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Bryan

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4/20/09 10:10am - Reply: '1972 Expansion Tank'
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

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I found two sources that both said that only cars that originally came with an aluminum radiator had aluminum expansion tanks.  I then found another reference that said all A/C cars had copper/brass radiators, and did not have an expansion tank.  

I hope that settles the question.

Larry


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10/9/09 3:20pm - Reply: '1972 Expansion Tank'
LarryT
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Worthington, OH - USA

Vette(s):
1972 Black C3 automatic with red interior. Options include AC, PS, PB, Am/Fm Wonderbar stereo.

Joined: 8/4/2009
Posts: 74
I also have a 1972 with not expansion tank.  How do I tell what kind of radiator is installed?

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1972 Coupe
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10/9/09 5:15pm - Reply: '1972 Expansion Tank'
apasbigal
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goldens bridge, NY - USA

Vette(s):
1972 T-Top 350 auto, matching numbers,Blue, ac

Joined: 11/3/2003
Posts: 498

My 72 SB auto- with Air/Con doesn't have any tank - I was told by a reputable source that it shouldn't have one - as this was the way they came from the factory.

Big Al



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10/10/09 12:07am - Reply: '1972 Expansion Tank'
BlueX2 Lifetime Member
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In doing some more research, I read that some cars came with the small tank, some came with the large tank, and some came with no tank at all.  There seems to be no pattern as to which cars had them and which did not.  It almost seems like they put on whatever they had that day, and if they ran out, then they cars didn't get one at all.  Ermm

Anyone have any more information?


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Bryan

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10/10/09 9:18am - Reply: '1972 Expansion Tank'
fp_vetter72 Lifetime Member
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COPPERAS COVE, TX - USA

Vette(s):
1972 corvette stingray convertible 2007 coupe

Joined: 7/6/2002
Posts: 412
72 350 with auto trans and A/C doesnt have one. Mine has the larger radiator to compensate for this. Confused me at first, but mine was an un-molested original when I got it from Cousin who owened it since 74.

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10/11/09 10:21am - Reply: '1972 Expansion Tank'
LarryT
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Worthington, OH - USA

Vette(s):
1972 Black C3 automatic with red interior. Options include AC, PS, PB, Am/Fm Wonderbar stereo.

Joined: 8/4/2009
Posts: 74
Thanks guys.  I guess I won't worry about it.  I don't see anywhere it would have been mounted, so I have to assume it never had one.

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- Larry Tanner

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1972 Coupe
Black with Red interior
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10/12/09 11:33am - Reply: '1972 Expansion Tank'
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
I am sure you did not have one.  All Air conditioned cars had brass radiators, and therefore no expansion tank.  All aluminum radiator cars had aluminum tanks.

Larry


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10/12/09 12:15pm - Reply: '1972 Expansion Tank'
Adams' Apple Lifetime Member
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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: 19458
It's confusing to start with, which set-up had what set-up...add to that the fact that a PO may have added the recovery tank, or replaced the radiator and removed the tank....Yeeeeesh. It's enough to drive a person nutz....and it would be a short drive for me anyway...Wits End

There is/was a directive regarding what engine/trans/radiator/option cars got the tank or not...it just don't make a lot of sense...


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10/12/09 2:58pm - Reply: '1972 Expansion Tank'
dskopp
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
Posts: 1956
Great knowledge and tips from the Pro's !!  No wounder I am a member of this site!!  "And the Beat goes on "....
Dan  Rolling On The Floor Laughing

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10/13/09 12:01pm - Reply: '1972 Expansion Tank'
my7t1 Lifetime Member
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Dorr, MI - USA

Vette(s):
71 Colonnade Hardtop Coupe Torch Red with black interior originally L48 built to push around 360hp

Joined: 8/21/2002
Posts: 2580
Alum. radiator with x-pansion tank. No filler on rad. Only used with manual trans. as there is no cooler in rad.
 
 
 
                                                                                                                                                                                                                                                                               
Copper & brass rad. No X-pansion tank. Filler on rad. Trans. cooler in outlet tank. HOWEVER, my 71 Small block, Man. has C&B rad with no trans. cooler, no x-pansion tank. I see no ryme or reason to what rad went with what model.Confused
 
my7T12009-10-13 10:06:13

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