Well, I think that is what this is called. It's the plastic bottle thing you pour coolant into. Well mine broke and its gunna cost ~100 bucks to replace it with a stock one. Just wondering if there is anyone that makes one that is metal or if anyone on here has made one. Also I searched and someone said something about getting one from summit but I went to their site and didn't find one. Thanks for the help.

 

are you meaning your AST? if so you can buy those at www.rx7store.net

 

Check this out....the auction has ended but this guy has more available. I got one and it looks good to me.

http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT

 

No, my car already has an aluminum ast. Here this is the thread was talking about https://www.rx7club.com/showthread.p...expansion+tank

 

You can get aluminum overflow tanks nearly anywhere. I ditched the stock plastic one and put an aluminum one on the driverside of the engine bay.. Works fine.

 

breakage is rare. 'filled' on dipstick is about 1/2 way up tank when cold, hot about 3/4.

most leaks at tank top due to overfilling, or leaking main o-rings.

I did use a smaller, customized 1Q pegasus plastic tank. This was part of my cold air intake, using right duct, and flowing by headlight motor as shown in that link pic.

ideal would be to eliminate both ast and exp tank, as someone did with a volvo s70 (or maybe vw)combination plastic tank that does both functions, mounted high. This is what most new cars use, and the rx8.

 

I have a stock one in perfect condition I will sell you. $25 +ship