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 4Likes
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1
Post By Ron61
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1
Post By Gaz64
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1
Post By 520SC
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1
Post By vector1
04-30-2018, 04:15 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
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Not Ranked
Trapped air in radiator. Lisle Spill-Free Coolant Funnels 24680.
I was watching a video about the Lisle Spill-Free Coolant Funnels 24680.
With my Cobra I don't have the FE type of overflow, so having the radiator below the top of the engine I get trapped bubbles. The video says to squeeze the radiator hose, but mine is the Coolflex type, which can not be squeezed. Why ? What can be done ?
Best regards,
Kevin
__________________
Regards,
Kevin
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04-30-2018, 04:57 PM
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CC Member
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Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,908
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Not Ranked
I had similar problems with mine, so installed an inline filler in the highest spot in the upper hose. Yes, I now have two radiator caps, but only really use the upper one.
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Brian
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04-30-2018, 05:42 PM
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CC Member
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Join Date: Aug 2017
Location: Maryville,
TN
Cobra Make, Engine: '65 Shelby Cobra, '66 Shelby GT350's
Posts: 279
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Not Ranked
A system that pulls a vacuum should help with your issue. Robinair makes a decent one that pulls the coolant through the entire cooling system while removing the remaining trapped air.
There are videos of this system in use on Google demonstrating it use.
Coolant Refiller | Robinair
__________________
~ Steven
6S1806, 1966 Shelby GT350 B/P Race car.
6S246, Shelby GT350 "carryover"
6S1745 Shelby GT350
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04-30-2018, 06:08 PM
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CC Member
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Join Date: Feb 2007
Location: Colorado Springs,
CO
Cobra Make, Engine: Backdraft, supercharged Coyote
Posts: 2,444
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Not Ranked
Jack up the front of the car, or park on a hill.
__________________
.boB "Iron Man"
NASA Rocky Mountain TTU #42
www.RacingtheExocet.com
BDR #1642 - Supercharged Coyote, 6 speed Auto
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05-01-2018, 04:09 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,593
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Not Ranked
I did the same as cycleguy55 on my first car and never had any problem with trapping ait.
Ron
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05-01-2018, 03:29 PM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Chilliwack,BC,
BC
Cobra Make, Engine: F5 Roadster
Posts: 1,422
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Not Ranked
air
Hi,
Drill a hole in the top of rad and tap it for a drain cock, pointing straight up. Open the valve and let the trapped air out.
Perry 
__________________
F5 cobra Mark 4 roadster, **SOLD** Ruby Wine Red with pearl,
dual 2" roll bars, warmed up 302, Edelbrock AVS carb and heads, E Street aluminum Heads, Comp cam and roller rockers, AOD, 4.10 Eaton Posi, Power Baer/disc brakes, block hugger headers, 2 1/2" under car exhaust, F500 18" black spoke wheels.
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05-01-2018, 06:48 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
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Not Ranked
Quote:
Originally Posted by bobcowan
Jack up the front of the car, or park on a hill.
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Lol,.... 
I like the Robinair system. High in price though. $90...eek !
With my Coolflex hose's, I can't use any tool that squeeze's the radiator hose, because of vacuum.
A company has a nice looking thermostat housing with a bleeder valve that has a o-ring and can rotate 360°. But, it's like $90 !
I made my aluminum sand casted thermostat housing years ago, so I could drill & tap a hole and use it as a bleed valve.
Maybe use some type of nice looking bolt ?
Any ideas ?
__________________
Regards,
Kevin
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05-01-2018, 06:55 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
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Not Ranked
Actually just looked on ebay and found a Trans Dapt with a bleeder, for $32.99 shipped.
Stupid question. Doesn't the intake need to be machined so the O-Ring has a groove to sit in, thus to seal ?
https://www.ebay.com/itm/Trans-Dapt-...4383.l4275.c10
__________________
Regards,
Kevin
Last edited by FUNFER2; 05-01-2018 at 08:08 PM..
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05-01-2018, 08:41 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
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Not Ranked
Quote:
Originally Posted by HighPlainsDrifter
Hi,
Drill a hole in the top of rad and tap it for a drain cock, pointing straight up. Open the valve and let the trapped air out.
Perry |
But, the radiator is lower than the intake.
__________________
Regards,
Kevin
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05-01-2018, 11:43 PM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
The best answer is to run a header tank, easy to fill and check during any maintenance.
The reason why so many new cars run header tanks.
Gary
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05-02-2018, 12:13 AM
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CC Member
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Join Date: Feb 2017
Location: Ewa Beach,
HI
Cobra Make, Engine: 1966 Street Beasts Cobra 427 S/C, 502 cid
Posts: 121
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Not Ranked
You need to install a pressurized coolant overflow tank above the level of the radiator. The overflow tank should have a 16 psi radiator cap.The cap at the top of your radiator must be drilled to allow unrestricted flow to the overflow tank. Your radiator discharge line should be routed to the bottom of the overflow tank. Once you set it up, your overflow tank will be the high point of the coolant system.
__________________
Todd
Last edited by 520SC; 05-02-2018 at 12:35 AM..
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05-02-2018, 01:18 AM
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CC Member
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Join Date: Feb 2017
Location: Ewa Beach,
HI
Cobra Make, Engine: 1966 Street Beasts Cobra 427 S/C, 502 cid
Posts: 121
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Not Ranked
Radiator cap drilled to allow unrestricted flow in both directions. 
Black hose delivers radiator expansion/contraction to/from the overflow tank. The overflow tank is mounted on the firewall, about 6" higher than the radiator. Blue hose comes from the water pump discharge port. 
When the overflow tank cap lifts, water is directed to a coolant reservoir. 
__________________
Todd
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05-02-2018, 09:13 AM
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CC Member
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Join Date: Dec 2004
Location: Kansas City,
KS
Cobra Make, Engine: jbl
Posts: 2,291
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Not Ranked
God I love big pictures.
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05-02-2018, 11:29 AM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
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Not Ranked
This is a very,....nice one too.
__________________
Regards,
Kevin
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05-03-2018, 06:35 PM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
Quote:
Originally Posted by vector1
God I love big pictures.
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Yes, my screen is not 4 feet wide. |
05-03-2018, 06:39 PM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
Quote:
Originally Posted by FUNFER2
This is a very,....nice one too.
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Yes, that is one nice way to go. |
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