Puking coolant at the track....Help!!!
 

Don't know what's up, but for some reason my car is wanting to puke it's coolant out the overflow tank after I've been running it hard..............

This past Saturday I was running it hard at the track (Sebring). For half a day it was fine, then all of a sudden I would run it hard for a few laps, it would hover in the 205-212 degree range, and then the temp gauge would zoom to 226- 245 and I knew I was puking coolant...............I would let it cool down, refill it, start all over, and the same thing would happen after just a few laps...............

Ryan W. suggested the Cap on the AST might be bad, so I borrowed his, but no difference (Thanks Ryan....).............Nick R. thought it might be a thermostat problem..................any suggestions anyone?

I did a pressure check recently and all is fine............stock radiator by the way and I know some people might automatically say, "Oh, you have to upgrade that, blah, blah, blah............", but I have had many track days with this radiator, as well as many others on this forum, and the stock seems to do just fine, until it splits, or leaks or whatever.............this is all just a recent symptom..............Also I started out with about a 25% concentration of coolant, but obviously was down to just water, after a few incidents.............

Thanks in Advance...........

David

Uh oh, this isn't good. These are the same symptoms my original motor had before it failed. The engine's rubber o-ring seal was the culprit. FWIW my original motor had 102,543 miles before it expired from the failed o-ring, with probably 10,000 miles from track lapping. I pray this isn't what's going on with your motor...

Were your fans coming on? I had a similar problem at a time trial event ... turned out that my fan fuse kept blowing out. Luckily, I had enough spares and was able to use the defog (and if necessary, the abs) fuse as replacements.

Definitely scary stuff seeing your temp gauges go up that high ... hope nothing real bad happened. :)