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  #1  
Old 11-08-2011, 01:58 PM
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Default Need help from a cooling system expert

I didn't know where to post this...

I'm trying to figure out a way to move the coolant reservoir on my truck. I don't know too much about these things and don't even know what type of system it is. I did some research and it looks like there are systems with overflow tanks and systems with expansion tanks. My main question is if I make an aluminum tank of the same volume and move it to the fender and reconnect any lines as they were, would this work properly? Does the top of the tank have to be at the same height as the original? Thanks for any help.
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Old 11-08-2011, 10:00 PM
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yep u got it just move it and keep it bout the same height.
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Old 11-09-2011, 11:43 AM
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So is it an overflow tank or expansion tank? I really don't know a lot about this. If it's a few inches lower does it matter? I tried researching but got very confused. From what I understand, if it's an overflow tank the height doesn't matter, it's simply just to catch the overflow when the radiator cap relieves pressure. With this system the fluid never returns back to the cooling system. That pretty much makes sense to me....but the expansion tank type doesn't. There's no radiator cap(the relieve is on the coolant tank cap), and the level DOES matter relative to the radiator. There is excess air in the tank and when pressure builds the air compresses and this is where the "overflow" is held. Then if there's too much pressure the cap relieves it. So from what I understand on my ram it's just an overflow tank, and height doesn't matter?

Enlighten me please....lol
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Last edited by snrusnak; 11-09-2011 at 11:46 AM.
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Old 11-10-2011, 12:01 AM
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it is overflow. expansion tank has a radiator cap on top, meaning the bottle is pressurized.
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Old 11-10-2011, 09:06 AM
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Thanks hemilancer, that makes a lot of sense. If that's so though, how come there's no radiator cap and there's a dipstick which we are supposed to maintain a correct level of fluid, and there is no other place to add fluid. This shows me that the coolant in the overflow tank does indeed return to the radiator. Since this is the case I don't understand exactly how the whole system works and if I need to maintain the same height with the new tank...
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