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| Front coolant tank (Page 1/4) |
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RCR
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MAY 03, 10:01 PM
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Hey guys,
I installed a Grand Am coolant tank in the back when I did my engine install. Is there any reason to use the front tank off the radiator?
Bob
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Gall757
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MAY 03, 10:39 PM
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What engine did you install? How did you plumb the tank? Most overflow setups use the radiator for a connection.....what did you use?
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Lambo nut
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MAY 03, 11:29 PM
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| quote | Originally posted by RCR:
Hey guys,
I installed a Grand Am coolant tank in the back when I did my engine install. Is there any reason to use the front tank off the radiator?
Bob |
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As long as your radiator cap pressure is greater than the pressure release device you used at the engine then you no longer need a tank up front.
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olejoedad
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MAY 04, 01:03 AM
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Consider that the radiator is designed as an air trap.....
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RCR
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MAY 04, 08:16 PM
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| quote | Originally posted by Gall757:
What engine did you install? How did you plumb the tank? Most overflow setups use the radiator for a connection.....what did you use? |
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4.0L Aurora. Uses a 90's Grand Am recirculating tank in the back. High point on the engine is plumbed to the tank.
I might have to get a small aftermarket tank for the front. Thoughts?
Bob
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Lambo nut
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MAY 04, 09:02 PM
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| quote | Originally posted by RCR:
4.0L Aurora. Uses a 90's Grand Am recirculating tank in the back. High point on the engine is plumbed to the tank.
I might have to get a small aftermarket tank for the front. Thoughts?
Bob |
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I belive the grand am resevoir has a 15 or 16 psi release with the screw on cap. If so put a heavier pressure or straight non pressure release cap on the radiator and you are good to go.[This message has been edited by Lambo nut (edited 05-04-2020).]
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Gall757
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MAY 04, 09:16 PM
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| quote | Originally posted by Lambo nut:
I believe the grand am reservoir has a 15 or 16 psi release with the screw on cap. If so put a heavier pressure or straight non pressure release cap on the radiator and you are good to go.
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As Olejoedad pointed out....everything above the outlet hose on the radiator will trap air. but I don't know if that hurts anything.
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wftb
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MAY 04, 10:47 PM
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When I did my 2.2 ecotec swap, I put the overflow in the front and used it in place of the Fiero overflow tank. It worked fine, no problems. But it just did not fit in the space very well and there was a lot of extra plumbing that went up to the front of the car to make it work. So I moved it to the back of the car in almost the same spot that the coolant tank in the picture shows. No tank up front anymore, and it still works fine. ------------------
86 GT built 2.2 ecotec turbo
rear SLA suspension
QA1 coilovers on tube arms
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Lambo nut
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MAY 04, 11:14 PM
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| quote | Originally posted by Gall757:
As Olejoedad pointed out....everything above the outlet hose on the radiator will trap air. but I don't know if that hurts anything. |
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I have a thermostat housing on a 350 SBC intake with a radiator cap top on it in my Lambo project and it has a 16 psi cap. It is the highest point in the system. I put a Stant racing 21-25 psi cap on the radiator (which is an aftermarket aluminum). Puke tank in the back, nothing in front and nipple for overflow on radiator plugged. I filled it from the back with the front cap off until coolant comes out then install cap. Continue filling the rest of the system. After reaching operating temperature, top off if needed at rear. Coolant will come out the instant I crack the front cap so I would question how much air could be trapped.
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theogre
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MAY 05, 01:06 AM
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As pointed out above...
The Radiator Will Trap Air and Will have air every time the R-cap is open.
Doesn't matter for adding whatever in the back. Worse many plumb extra tanks etc wrong and make more problems.
The trap air in the radiator will reduce cooling the "water" going thru it.
You Cannot purge all of the air there or other places by follow Fiero Burping Myths.
System needs heat cycles and working front tank to purge air trapped in the radiator.
Running 2 "Radiator" caps on the system is a bad idea regardless of PSI. Either or both can move air and coolant during heat cycles.
Hot coolant may go out in 1 cap... When cool the system will use either or both to suck coolant or air thru the check valve.
R-cap advertise PSI rating is not = to real pressure when hot. Not even real test pressure for a cold cap. Cap tolerance means ± Xpsi to pass. IOW That "16psi" cap passes @ 14 to ~ 16.5 psi on 15-16 psi system that test to ~ 18.5psi.
Can buy several caps and each one has different test PSI.------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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