Over flow vs reservoir tank on LS swap - Chevelle Tech
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post #1 of 7 (permalink) Old Nov 19th, 19, 4:26 PM Thread Starter
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Michael
 
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Over flow vs reservoir tank on LS swap

Been doing some searching on this, is a reservoir tank needed with a swap or will a over flow tank work? I know that they are used differently, being a over flow simply catches what is purged out of the system, and a reservoir will hold and pull back into the system. I have most of my cooling system plumbed using just a overflow as the original did. Any thoughts?

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post #2 of 7 (permalink) Old Nov 19th, 19, 4:46 PM
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Re: Over flow vs reservoir tank on LS swap

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Originally Posted by Mikes64 View Post
Been doing some searching on this, is a reservoir tank needed with a swap or will a over flow tank work? I know that they are used differently, being a over flow simply catches what is purged out of the system, and a reservoir will hold and pull back into the system. I have most of my cooling system plumbed using just a overflow as the original did. Any thoughts?
I think that it's better to have a reservoir so the coolant can get siphoned back into the radiator ensuring that the cooling system never runs out of coolant. Like you said, an overflow tank will catch whatever is leaking out of the rad but will not siphon it back inů

Claude.
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post #3 of 7 (permalink) Old Nov 20th, 19, 7:56 AM Thread Starter
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Michael
 
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Re: Over flow vs reservoir tank on LS swap

I agree with you, as that's the way the manufacture has built most of these, but curious if it is absolutely necessary. It would change the direction of my build a little but could be done.

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post #4 of 7 (permalink) Old Nov 20th, 19, 8:34 AM
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Jeff
 
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Re: Over flow vs reservoir tank on LS swap

It's not necessary, you could literally drop the overflow to the bottom of the car if you wanted.

It's really your choice, an overflow would keep coolant off the roads/track, reservoir is self sufficient.

I've got my battery in the trunk and put a cheap Dorman reservoir in place where the battery tray was. Works great.

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post #5 of 7 (permalink) Old Nov 20th, 19, 9:30 AM
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Re: Over flow vs reservoir tank on LS swap

I also run a cheap dorman brand universal overflow tank on my conversion and with a proper radiator cap, It will siphon coolant back into the radiator when cooled off. I mounted mine on the firewall as I am not concerned with location because this car is a full on restomod. See pics in my garage
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post #6 of 7 (permalink) Old Nov 20th, 19, 3:45 PM Thread Starter
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Michael
 
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Re: Over flow vs reservoir tank on LS swap

Thanks Jeff, Mark this is likely what I will do, had planned to use the original wiper washer tank as it sits next to the radiator and over flow points in that direction. Using a Vodka bottle for wiper wash.

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post #7 of 7 (permalink) Old Nov 21st, 19, 1:13 PM
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Jim
 
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Talking Re: Over flow vs reservoir tank on LS swap

Quote:
Originally Posted by modern malibu View Post
I also run a cheap dorman brand universal overflow tank on my conversion and with a proper radiator cap, It will siphon coolant back into the radiator when cooled off. I mounted mine on the firewall as I am not concerned with location because this car is a full on restomod. See pics in my garage
not to be picky, but that's a "reservoir"; designed to contain expanded hot coolant, and feed it back into the radiator when it cools and contracts. In so doing, it prevents pollution and air in the system, allowing one to be nice person and minimize corrosion in the system.
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