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Coolant Overflow Tank
#1
I have check with the common mustang parts suppliers and no one seems to carry an oem/aftermarket overflow tank replacement. Anyone have any leads??
Cody--
72 Mach-1 12:1 532 Forged internal Scat stroker, Kaase P51 heads, Comp roller cam, March serpentine conversion, C6 manual VB, 9'' 4:33:1.
66 convertible 289, 82k miles.
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#2
71-73's didn't have an overflow tank. The excess would vent onto the roadway....
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#3
I have seen a few cars that recycle old fire extinguishers to use as an over flow tank and they look pretty good. A nice stainless steel thermos or drinking bottle does a good job also.
Eric


[Image: a58hgh.jpg]
DRIVE IT DON'T STORE IT!
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#4
Yeah, the overflow tube just vents out to the ground near the grille.
[Image: 1gq8uo.png]
1971 Mach 1 - 306cid/C4 Bright Yellow
1972 Coupe - 306cid/C4 Gold Glow (in restoration phase)
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#5
(12-16-2010, 06:12 AM)rocketfoot Wrote: Yeah, the overflow tube just vents out to the ground near the grille.

I've added one from an autoparts store and it does the job well. I went through the trouble to "hide" it behind the headlight but I had to take apart the brackets to get it to fit.
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#6
if your using an overflow tank remember to buy a radiator cap that is designed to work with an overflow tank.

the regular rad cap is not meant to be used with an overflow tank so it won't suck in coolant from the tank if needed, it will just vent to the tank if the rad starts to overheat.
[Image: sig.jpg]
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#7
This is what's in my 73 convertible.


.jpg   DSCN1341_062 (Small).JPG (Size: 37.11 KB / Downloads: 96)


.jpg   DSCN1342_063 (Small).JPG (Size: 52.83 KB / Downloads: 94)

Maybe the Mach 1 is different.

Doc
Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
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#8
Yeah its funny. The first time after i topped off my radiator and got it nice and hot it spit all over the driveway. I was losing my mind. Then I realized it didnt have an overflow anyways.

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#9
(12-17-2010, 12:13 AM)akherber Wrote: Yeah its funny. The first time after i topped off my radiator and got it nice and hot it spit all over the driveway. I was losing my mind. Then I realized it didnt have an overflow anyways.
The fill level on these systems 71-73 is about an inch below the neck of the radiator.You should not loose any if you maintain that level.
[Image: 16kuyc0.jpg]
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#10
(12-17-2010, 07:04 AM)FastE Wrote:
(12-17-2010, 12:13 AM)akherber Wrote: Yeah its funny. The first time after i topped off my radiator and got it nice and hot it spit all over the driveway. I was losing my mind. Then I realized it didnt have an overflow anyways.
The fill level on these systems 71-73 is about an inch below the neck of the radiator.You should not loose any if you maintain that level.

To add to Eddie's post - the system is self-leveling. Fill it to the cold level on the readiator and leave it alone. It'll find it's own level in a short time. If you keep filling it to the top, it will keep dumping it out on your driveway. Just make sure you have a good radiator cap and you're good to go. Stant makes one that looks very similar to the original Ford and only costs $3.00 or so. Has worked fine on my 71 for several years now.

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