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Is my swirl pot design okay?

Old 09-30-2015, 04:39 PM
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Default Is my swirl pot design okay?

I'm planning on building a swirl pot to mount next to the ABS unit. This will double as my new coolant fill location as well. Most of the pictures I see of swirl pots don't have the integrated filler neck, but instead have a nipple leading to a separate expansion tank which then leads to a reservoir. Would combining the two together have a negative effect? This is my design plan so far, any thoughts?

Attached Thumbnails Is my swirl pot design okay?-swirl%2520pot_zpspvsrltv6.png  

Last edited by FrankB; 09-30-2015 at 10:59 PM.
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Old 10-01-2015, 12:52 PM
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Was this just a dumb question and the design isn't that big of a deal?
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Old 10-01-2015, 01:47 PM
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I'm not even sure why you need it so I can't comment on merit of design.
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Old 10-01-2015, 03:26 PM
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Originally Posted by Itty View Post
I'm not even sure why you need it so I can't comment on merit of design.
Right now my radiator isn't the highest point in the system. I'd like to ensure that I am removing all of the air from the system. I already have all the materials to make it. I was just looking to make sure it wasn't flawed before I went ahead and started cutting materials.
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Old 10-02-2015, 12:19 AM
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sure, looks fine. Maybe, maybe you wont get the full deaeration benefits from the swirl pot because your connection to the expansion tank can only happen when the system pressure is over a certain amount.
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Old 10-02-2015, 04:20 AM
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why not making your swirl pot also a expansion tank
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Old 10-02-2015, 08:15 AM
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Size would be my guess. We typically expect the expansion tank to have a fairly large capacity.

That said, you can buy little inline adapters from racing shops which have two radiator hose fittings and a cap / overflow line. Not a swirl pot, but an easy way to put fill / bleed at the highest point.

Last edited by Joe Perez; 10-02-2015 at 10:34 AM.
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Old 10-02-2015, 10:15 AM
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Originally Posted by FrankB View Post
Right now my radiator isn't the highest point in the system. I'd like to ensure that I am removing all of the air from the system. I already have all the materials to make it. I was just looking to make sure it wasn't flawed before I went ahead and started cutting materials.
You could pick up
this this
to fill the system and make sure there is no air in it, or one of the magic funnels.
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Old 10-02-2015, 12:15 PM
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Originally Posted by creon View Post
why not making your swirl pot also a expansion tank
That's what I am trying to do with this design. Should I do something differently?

Originally Posted by Joe Perez View Post
Size would be my guess. We typically expect the expansion tank to have a fairly large capacity.

That said, you can buy little inline adapters from racing shops which have two radiator hose fittings and a cap / overflow line. Not a swirl pot, but an easy way to put fill / bleed at the highest point.
I'm using a 7" tall section of 4"OD aluminum pipe for the core. So capacity should be around 48oz. I thought of just using an inline fill cap like you mentioned but if I can make something better, then why not?

Originally Posted by shuiend View Post
You could pick up this to fill the system and make sure there is no air in it, or one of the magic funnels.
I have and use one of those radiator funnel kits and the cost of the airlift just isn't justified now that I don't work on cars for a living anymore.

I have all of the materials already just laying around, leftovers from other projects. It's just a matter of welding it all up.
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Old 10-02-2015, 12:58 PM
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Originally Posted by Leafy View Post
sure, looks fine. Maybe, maybe you wont get the full deaeration benefits from the swirl pot because your connection to the expansion tank can only happen when the system pressure is over a certain amount.
Since it would be my new fill point wouldn't I be able to achieve most of this at time of fill when using a radiator funnel and bringing the system to operating temp and letting it "burp"?
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Old 10-02-2015, 10:00 PM
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Originally Posted by FrankB View Post
Since it would be my new fill point wouldn't I be able to achieve most of this at time of fill when using a radiator funnel and bringing the system to operating temp and letting it "burp"?
No, the real benefit of the swirl pot is to get aeration out that happens in a properly bled system, due to cavitation and such.
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