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Buying a AST question

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Old Aug 6, 2007 | 01:39 PM
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2fast4u_rx7's Avatar
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From: saskatoon sask
Buying a AST question

Hey Guys, I was thinking of purchasing a ast off of ebay. It does say that it requires a lower rad hose adaptor but I believe that is for the cars that dont have ast to begin with. Can someone clarify this for me and as well can you tell me if this AST is any good? Here is the link below. Thanks in advance!
http://cgi.ebay.com/ebaymotors/Air-R...spagenameZWDVW
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Old Aug 6, 2007 | 01:54 PM
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I wouldnt buy that. Not worth it----if you cause a problem in the cooling system, you're looking at a cooked engine and a high repair bill. Either purchase one of the ASTs designed specifically for the FD (that has 3 nipples, two on the sides and one on the bottom), or delete it all together with the FC filler cap.
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Old Aug 6, 2007 | 02:43 PM
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Not to thread jack or anything...but are there any issues to deleting it all together?
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Old Aug 6, 2007 | 04:13 PM
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I would keep the ast and buy a good one. Their has been issues with this and it has been covered before FD3S.net or the FAQ.
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Old Aug 6, 2007 | 04:49 PM
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Originally Posted by rx73rotorj
I would keep the ast and buy a good one. Their has been issues with this and it has been covered before FD3S.net or the FAQ.
Here's the link I found on fd3s.net/Lightning in a world of thunder, and no ill effects are mentioned:

http://www.fd3s.net/coolant_tank_elimination.html
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Old Aug 6, 2007 | 04:56 PM
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Originally Posted by drew32
Not to thread jack or anything...but are there any issues to deleting it all together?
It makes it more difficult to burp/purge excess air from the cooling system (but not impossible).
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Old Aug 6, 2007 | 08:06 PM
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What's wrong with the ebay one? The only difference is that it's nipple is at the top not at the bottom.

Would that make that huge of a difference? Isn't it the same functionality as replacing it with the smaller volume FC cap? (Ie the Ebay one would have to be filled all the time for it to actually 'burp' the airbubbles right? Or does it matter?)
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Old Aug 6, 2007 | 08:11 PM
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i make ast tanks let me know if you are interested.
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Old Aug 6, 2007 | 08:40 PM
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[QUOTE=ehos;7210309]What's wrong with the ebay one? The only difference is that it's nipple is at the top not at the bottom.

There lies the important difference. It needs to be at the bottom.

Originally Posted by ehos
Would that make that huge of a difference?
HUGE

Originally Posted by ehos
Isn't it the same functionality as replacing it with the smaller volume FC cap?
No, completely different. Using the FC cap turn that into a recovery tank, not an expansion tank. Expansion tanks & Air Seperation Tanks differ in thier roles from recovery tanks.
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Old Aug 6, 2007 | 10:21 PM
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Now I know! (I have a Petit AST, but I kinda felt 'ripped' off by 3 times the price when I saw the egay ones).
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