Diary of a Madman; TitaniumTT's see you @ DGRRXI RE-REbuild

hades · \r\n \r\n \r\n 05-20-2011, 08:31 PM\r\n \r\n \r\n

Lastly is the AST. I really didn't have to do much to this except add a 2nd 1/4" npt bung for the outlet from the rad. That and scrape off all the old powdercoating so i could recoat it..... OH... and I FINALLY after looking for like a year, found a rad cap that matches all of the other caps that I have under the hood. I was so happy I literally jumped up and down and did the bus-driver after I bought it.

The AST is pretty simple and very effective at purging air from a cooling system. Basically you plumb in the two highest points in the cooling system, the highes on the engine, and the highes on the rad, this if course being a rad without a cap, into the AST. The AST has the pressure cap on it.

All of the air in the cooling system collects in the AST. The bottom of the AST is plumbed on the vacuum side of the flow, lower rad hose going into the engine. in my case I have a T-fitting on the frame rail that is also the return from the heater core. From the T it goes into the -10 bung on the lower portion of the "stock"

WP housing. So, air and coolant go in, coolant comes out the bottom. Air stays in the AST. The AST is also the filling location

When the cooling system heats up, coolant expands. The air is purged from the AST through the pressure cap, and into the overflow tank. Plumbing from the pressure cap MUST be into the bottom of the overflow tank otherwise the system will just continue to suck air in when it cools. This is what was happening to me the entire trip, but I knew about it and it actually was never a problem

So, on my AST, the top fitting on the side comes from the top of the WP housing. THe highest point in the cooling system on the engine. The bottom fitting comes from the rad, the highest point on the rad. The one in-line with the cap is plumbed into the overflow. Isn;t that a damn good looking cap??

That's right bitches.... them 2 fittings be PERFECTLY aligned... yes, I spent the time to fit the fittings and double check before I welded them up for certain..... hey... suck it... I am that guy and you all know it accepted em for it

Isn't that a damn good looking cap though?

When I get some batteries tomorrow I'll add a pic of the fitting from the radiator to this post.... until then... I hope Hades is happy

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\r\n \r\n \r\n 05-17-2011, 10:33 PM\r\n \r\n \r\n	\r\n \r\n #17\r\n \r\n
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