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11/14/14 10:46am - Original Message: 'Lower radiator hose replacement'
Jasond56
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Kenosha, WI - USA

Vette(s):
1973 Corvette Stingray Coupe VIN 1Z37J3S418986 350 L-48 Automatic T-Tops St. Louis Assembly, 18,986th car built in 1973, Paint = 976 Mille Miglia Red, Interior = 425 Dark Red Vinyl (Ox Blood)

Joined: 5/7/2014
Posts: 154
good morning all! As I was going through my 1973 to get her ready for storage, I noticed a bulge in the lower radiator hose. Started her up and sure enough I found coolant on the ground. Had the system pressure tested just to make sure nothing else was going on and everything checked out so I'm guessing the bulge in lower rad hose is culprit. Pretty expensive to have my garage fix so This newbie would like to attempt. I had a few questions/comments: The forum seems split on whether or not I need the coil lined hose. Suggestions? Dish soap seems the preferred method to slip new hose on. Is removing fan shroud recommended to switch lower rad hose? Proper procedure on refilling with coolant? Car running, car off, directly into radiator, radiator resivoir, how much coolant etc? I've googled and youtubed for a step-by-step and have not found anything worthwhile. As always, thanks in advance kind Corvetters!

____________________________________
"You know, we always called each other goodfellas. Like you'd say to somebody: You're gonna like this guy, he's all right. He's a goodfella. He's one of us. You understand?"




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11/14/14 12:34pm - Reply: 'Re: Lower radiator hose replacement'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
Raise front end up high enough to crawl underneath via ramps or jack and jack stands.
Remove radiator cap. (engine cold)
Take a empty bucket/container and pliers under car.
Place bucket under petcock. Use pliers to gently open the petcock and drain radiator.
Loosen hose clamps and slide them out of the way.
Use a radiator hose removal tool to help break the bond between the hose and the radiator neck/waterpump neck. If you can find a tool use a razor knife to slice the hose ends so you can peel them off. Don't cut yourself. 
Place hose clamps over new hose (w/coil), then slide into place. Vaseline will help slide the ends on.
Tighten clamps.
Close drain petcock.
Refill system with universal 50/50 premixed antifreeze.
Start car and let the system bleed out the air with the radiator cap off.
Set you heater controls to defrost. When you get heat from there you'll know the heater core is free of air pockets. 
Keep a close eye on the temperature gauge. If it starts to rise. Blip the throttle to help push air pockets out of the cooling system. Feel the upper radiator hose. If it gets warm or hot the thermostat has opened. If it keeps rising dangerously, shut it down and let it cool off. You'll probably have antifreeze spitting out the filler neck. 
Once the system is bled, top off the radiator, install the radiator cap. check for leaks. 
Retighten the hose clamps.
Top off the overflow bottle and take it for a ride.
Then recheck for leaks.

Good luck! 

While your under there check for leakage around the water pump to rule out any possible leaks there.

This is a picture of a radiator hose removal tool.




|UPDATED|11/14/2014 9:34:12 AM (AZT)|/UPDATED|


____________________________________

GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


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11/14/14 12:34pm - Reply: 'Re: Lower radiator hose replacement'
nextdoor76 Gold Member
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Kimberling City, MO - USA

Vette(s):
1976 Stingray

Joined: 12/2/2012
Posts: 49

Well, I hope you have small hands. In the factory that hose was installed before radiator, rad. frame and body were put on. Easy for them...!!! I had the shroud off, lower right grill out, and then had to loosen the radiator frame on both sides, just to get enough room to get my hands and hose in there. I swore never again!!!!! I had the engine out and should have put it on motor before reinstalling. You do what you have to do. I went org. hose for replacement. But I have keep everything as org. as I could, or money permitted.




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11/14/14 1:45pm - Reply: 'Re: Lower radiator hose replacement'
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
Sarge81 said: Raise front end up high enough to crawl underneath via ramps or jack and jack stands.
Remove radiator cap. (engine cold)
Take a empty bucket/container and pliers under car.
Place bucket under petcock. Use pliers to gently open the petcock and drain radiator.
Loosen hose clamps and slide them out of the way.
Use a radiator hose removal tool to help break the bond between the hose and the radiator neck/waterpump neck. If you can find a tool use a razor knife to slice the hose ends so you can peel them off. Don't cut yourself. 
Place hose clamps over new hose (w/coil), then slide into place. Vaseline will help slide the ends on.
Tighten clamps.
Close drain petcock.
Refill system with universal 50/50 premixed antifreeze.
Start car and let the system bleed out the air with the radiator cap off.
Set you heater controls to defrost. When you get heat from there you'll know the heater core is free of air pockets. 
Keep a close eye on the temperature gauge. If it starts to rise. Blip the throttle to help push air pockets out of the cooling system. Feel the upper radiator hose. If it gets warm or hot the thermostat has opened. If it keeps rising dangerously, shut it down and let it cool off. You'll probably have antifreeze spitting out the filler neck. 
Once the system is bled, top off the radiator, install the radiator cap. check for leaks. 
Retighten the hose clamps.
Top off the overflow bottle and take it for a ride.
Then recheck for leaks.

Good luck! 

While your under there check for leakage around the water pump to rule out any possible leaks there.

This is a picture of a radiator hose removal tool.







Dang Sarge! I'm impressed. Been in the rad business for 43 years and couldn't have said it better meself. Lookin for a job in Michigan??Thumbs Up

____________________________________

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11/14/14 2:31pm - Reply: 'Re: Lower radiator hose replacement'
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: 19447
Sarge81 said: ...use a razor knife to slice the hose ends so you can peel them off. Don't cut yourself.

That's the BEST way to get old hoses off of radiator or heater cores.....keeps you from damaging the necks, or possibly cracking the soldered joints on the radiator. Thumbs Up
(I think Darryl must write repair instructions for Mitchell or something....that was great!)

I'm not big on using petroleum products to make hoses go on easier, due to the fact that oils/greases can soften the hose over time....it also makes it harder to get a tight seal. I use a little straight antifreeze inside the hose ends. It's slick, and will squish out a little easier when tightening the clamps. That's just me. Lots of folks use Vaseline, wheel bearing grease, WD-40, whatever, and it accomplishes the task at hand(getting the hose on) just fine. Wink

As far as spring/no spring in the lower hose, you NEED that spring in there. And that's all I have to say about that....LOL

Good luck with your project. Have patience....that hose ain't gunna just fall off, nor will the new one magically suck itself back on...it's gunna take some finagling, some head scratching, and a few well placed curse werds, but it can be done without dis-assembling the whole front end. Just take yer time....and have a huge drain pan in place, 'cause you WILL make a mess. Ouch


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Joel Adams
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11/14/14 7:27pm - Reply: 'Re: Lower radiator hose replacement'
Jasond56
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Kenosha, WI - USA

Vette(s):
1973 Corvette Stingray Coupe VIN 1Z37J3S418986 350 L-48 Automatic T-Tops St. Louis Assembly, 18,986th car built in 1973, Paint = 976 Mille Miglia Red, Interior = 425 Dark Red Vinyl (Ox Blood)

Joined: 5/7/2014
Posts: 154
Sarge!  Hats off to you, sir!  I followed your excellent step-by-step and got the lower rad hose off without removing anything else!!!  It wasn't easy, but with a little maneuvering, and a few careful razor slices, she came off!  I was even able to flush the system three times before removing hose.  Feeling like a man today!  As you can see, the old hose was quite old and the spring was rotten.  I shudder to think of the debris washed into my system from the rotting spring :0
See below...the numbers are: GM 331855 AJ GATES

I wasn't able to get the new hose back on today.  Started getting too late.  I pushed the vehicle back into the garage.  The temperature is supposed to really drop here in southern Wisconsin.  Around 20 degrees or so.  Should I be concerned about having no coolant and no lower rads hose attached?

Finally, the new rad hose I purchased did not come with an internal spring.  Called a corvette shop near me looking for a spring or a spring/hose combo and he said I do not need the spring, that he sometimes adds the spring and sometimes he does not...with no rule of thumb.  Your thoughts?

Again, thank you for the awesome support!!! :)




____________________________________
"You know, we always called each other goodfellas. Like you'd say to somebody: You're gonna like this guy, he's all right. He's a goodfella. He's one of us. You understand?"




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11/14/14 9:18pm - Reply: 'Re: Lower radiator hose replacement'
johnu
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Eagan, MN - USA

Vette(s):
1981 Corvette Two-Tone Claret color, 4 spd, C7 Vert

Joined: 5/23/2007
Posts: 504
If I'm not mistaken the spring keeps the hose from "sucking in" on it's self.  If GM did not need it, why was it there!   Wink 

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      Only 23 years together
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11/14/14 10:36pm - Reply: 'Re: Lower radiator hose replacement'
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.

Joined: 7/9/2003
Posts: 373
You definitely need the spring in the lower hose.  Since the lower hose is on the suction side of the water pump, the spring prevents the hose from collapsing as previously mentioned.

____________________________________

1973 L-82 4 spd

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11/14/14 11:09pm - Reply: 'Re: Lower radiator hose replacement'
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: 19447
 That's the original hose for the car....kewl!
And again....you DO need the spring. Get a hose with the spring, or buy a cheapo generic hose that does have the spring, and install it in the one that fits the car.


____________________________________
Joel Adams
C3VR Lifetime Member #56    
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             NCRS

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11/15/14 1:03pm - Reply: 'Re: Lower radiator hose replacement'
Jasond56
Former Member
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Kenosha, WI - USA

Vette(s):
1973 Corvette Stingray Coupe VIN 1Z37J3S418986 350 L-48 Automatic T-Tops St. Louis Assembly, 18,986th car built in 1973, Paint = 976 Mille Miglia Red, Interior = 425 Dark Red Vinyl (Ox Blood)

Joined: 5/7/2014
Posts: 154
The one time in my life I was glad I have small hands! Hug

I'm sure getting the new lower rad hose back on will be another animal all together...


____________________________________
"You know, we always called each other goodfellas. Like you'd say to somebody: You're gonna like this guy, he's all right. He's a goodfella. He's one of us. You understand?"




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11/15/14 1:24pm - Reply: 'Re: Lower radiator hose replacement'
Jasond56
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Kenosha, WI - USA

Vette(s):
1973 Corvette Stingray Coupe VIN 1Z37J3S418986 350 L-48 Automatic T-Tops St. Louis Assembly, 18,986th car built in 1973, Paint = 976 Mille Miglia Red, Interior = 425 Dark Red Vinyl (Ox Blood)

Joined: 5/7/2014
Posts: 154
Got it!  Thank you.  I will do the hose/spring combo.

Unfortunately I cannot find a hose/spring combo anywhere near me, but I might have a lead from a GM dealer in my neighborhood.  Will not find out until Monday if the part I need to order will contain the spring.  If it does have the spring, I will not receive the part for 3 days, and I'm going out of town until Friday and will not get to replacing hose / refill with antifreeze until Saturday.  Should I be concerned with leaving the car in the garage with no coolant for a week or more?  We're getting into the 20's here at night.

If the GM dealer cannot get the combo, is there a work around?  You mentioned, "Get a hose with the spring, or buy a cheapo generic hose that does have the spring, and install it in the one that fits the car."  Will that reduce the flow of coolant in any way?  Can you please explain a little further?

Thanks in advance!


____________________________________
"You know, we always called each other goodfellas. Like you'd say to somebody: You're gonna like this guy, he's all right. He's a goodfella. He's one of us. You understand?"




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11/15/14 5:51pm - Reply: 'Re: Lower radiator hose replacement'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
Glad to help when I can. The step by step thing was derived (actually drilled in my skull) from having to read Air Force T.O's( technical order) manuals. Every job we did on a aircraft we had to have the T.O. for that specific aircraft, specific task and it better be open to the exact page and step while you were performing the repair/task. Otherwise you'd get a royal butt chewing if QA was in the AO. Big smile

I was poking around the inner web and found this...
Paragon Corvette Reproductions Part #2233 


____________________________________

GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


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11/15/14 7:24pm - Reply: 'Re: Lower radiator hose replacement'
Jasond56
Former Member
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Kenosha, WI - USA

Vette(s):
1973 Corvette Stingray Coupe VIN 1Z37J3S418986 350 L-48 Automatic T-Tops St. Louis Assembly, 18,986th car built in 1973, Paint = 976 Mille Miglia Red, Interior = 425 Dark Red Vinyl (Ox Blood)

Joined: 5/7/2014
Posts: 154
Ordered!  Thanks again, sir!

Any thoughts on not being able to get to the vette again for about a week+?  I have it stored in my garage, no coolant, and we're hitting 20s at night.  Should I be concerned?  

Do you think the rusting/rotting original spring did any damage I'm not aware of?  I imagine all that funk washing into my system...

I see you're from West Seneca NY.  My family and I were just up that way.  I took my wife, son and daughter to Salem, MA for Halloween.  Drove right through your area.  Very nice up there!




____________________________________
"You know, we always called each other goodfellas. Like you'd say to somebody: You're gonna like this guy, he's all right. He's a goodfella. He's one of us. You understand?"




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11/16/14 12:55pm - Reply: 'Re: Lower radiator hose replacement'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
Your engine should be fine provided there is no straight water in the engine block. If there is still the old residual antifreeze left in the system it should not freeze. 

If there is straight water in the engine block you can remove the engine block drain plugs. One on each side of the block. They are just above the oil pan, middle of the length of the block. If you have to remove them and nothing comes out, take a small screwdriver and clean the crud out and the water should come pouring out. 

I don't think the deteriorated spring did any damage. It probably dissolved over time. If there are any pieces in the system they are most likely resting in the bottom of the engine block water jacket. 

If you ever pass though my area again, give my a shout. Maybe we could meet up and get a bite of some fine artery clogging Buffalo cuisine. We finally have a really nice "waterfront" on Lake Erie.  


____________________________________

GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


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11/16/14 4:23pm - Reply: 'Re: Lower radiator hose replacement'
Jasond56
Former Member
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Kenosha, WI - USA

Vette(s):
1973 Corvette Stingray Coupe VIN 1Z37J3S418986 350 L-48 Automatic T-Tops St. Louis Assembly, 18,986th car built in 1973, Paint = 976 Mille Miglia Red, Interior = 425 Dark Red Vinyl (Ox Blood)

Joined: 5/7/2014
Posts: 154
Thank you and I understand.  

As I was flushing, even after the third flush, antifreeze was still present so I'm hoping I'm okay.  I will check the drains to make sure no water is in there.  I'm assuming water should NEVER be in the system.  If water does drain out, and once the part arrives from Paragon, it's reassembling rad hose and adding coolant and burping as normal?  Nothing more to add as far as fluid?

Any thoughts on SeaFoam into carb for storing?  I read a thread and it mentioned pour SeaFoam straight into carb until the motor dies when storing for winter.  I have the foam but obviously cannot add until cooling system is up and running.  Just wondering if there are any tricks.

Next time we're up there I will give a holler!  We ate at Osteria 166 on Franklin St. in downtown Buffalo on our way to Massachusetts.  Very good food and we had to cut our pizza with scissors!  Brought me back to when I was a kid.  Old school Italian!

Thanks again and as always I very much appreciate the help!




____________________________________
"You know, we always called each other goodfellas. Like you'd say to somebody: You're gonna like this guy, he's all right. He's a goodfella. He's one of us. You understand?"




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11/16/14 6:04pm - Reply: 'Re: Lower radiator hose replacement'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
So did you flush out the just the radiator or did you flush out the engine and radiator?
If you had the lower radiator hose off and then flushed it from the filler neck then you probably didn't flush out much antifreeze out of the engine.

Carburetor?? Whats that? j/k. Clown I don't have one of them anymore on mine. I don't know much about Seafoam. I've heard of it but have no experiences with it. I would post another thread asking about it. I'm sure there are a few members here who have used it.

I never ate at the Osteria. Sounds like a good place to eat. Good online reviews for the most part. Yeah our pizza here is nothing like Chicago nor NYC stuff. Out of all the places in the USA, I love our pizza pies here. When you do come up this way try to give me a couple days headsup so I can make reservations to a place called "The Mulberry." It's a hidden little secret buried in a old Bethlehem steel plant neighborhood. The Italian cuisine there is heaven on a plate. The meatball appetizer is the size of a softball.


____________________________________

GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


Lifetime Member #26
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11/16/14 7:05pm - Reply: 'Re: Lower radiator hose replacement'
Jasond56
Former Member
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Kenosha, WI - USA

Vette(s):
1973 Corvette Stingray Coupe VIN 1Z37J3S418986 350 L-48 Automatic T-Tops St. Louis Assembly, 18,986th car built in 1973, Paint = 976 Mille Miglia Red, Interior = 425 Dark Red Vinyl (Ox Blood)

Joined: 5/7/2014
Posts: 154
I love those hidden gems.  I get to travel for a living, and I insist, where ever I find myself, on going local when eating and drinking.  I can hit an Applebees anywhere in the world.  But a place like Osteria or the one you mentioned is where it's at!  Speaking of, your Blue Point Brewing Company in Long Island has a great beer called Toasted Lager...fantastic!  I'm a beer geek.  Cool

What I did was open the petcock on the rad, drain out old coolant, close the petcock and fill rad with water from my hose.  I turned on the vehicle until upper rad got warm, then dumped the radiator.  Wash, rinse, repeat 3X.  
That's just a coolant system flush, correct?  Ermm


____________________________________
"You know, we always called each other goodfellas. Like you'd say to somebody: You're gonna like this guy, he's all right. He's a goodfella. He's one of us. You understand?"




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11/16/14 7:18pm - Reply: 'Re: Lower radiator hose replacement'
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.

Joined: 7/9/2003
Posts: 373
It is if you had heater on High so the water would flush it out.  Also I use a Prestone Radiator Flush to remove some of the solder bloom and mineral deposits.

Just to be on the safe side you might pour some antifreeze in the t-stat opening 'til it runs out the bottom hose connection.

And when you get ready to fill, unless money is no object, don't buy the 50-50 premix.  Buy regular antifreeze and distilled water.  It's a lot cheaper.


____________________________________

1973 L-82 4 spd

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11/16/14 7:29pm - Reply: 'Re: Lower radiator hose replacement'
Jasond56
Former Member
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Kenosha, WI - USA

Vette(s):
1973 Corvette Stingray Coupe VIN 1Z37J3S418986 350 L-48 Automatic T-Tops St. Louis Assembly, 18,986th car built in 1973, Paint = 976 Mille Miglia Red, Interior = 425 Dark Red Vinyl (Ox Blood)

Joined: 5/7/2014
Posts: 154
GAH!  Having the heater on high is the one thing from Sarge's step-by-step I forgot to do!!  Is that a bad thing?  Angry




____________________________________
"You know, we always called each other goodfellas. Like you'd say to somebody: You're gonna like this guy, he's all right. He's a goodfella. He's one of us. You understand?"




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11/16/14 7:53pm - Reply: 'Re: Lower radiator hose replacement'
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.

Joined: 7/9/2003
Posts: 373
It is if the heater core freezes.  It's a bear to replace.

Did you try to get just any lower radiator hose at a parts store so you could pull the spring out of it and use it in yours?

|UPDATED|11/16/2014 4:53:17 PM (AZT)|/UPDATED|


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1973 L-82 4 spd

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