having bubling sound coming from the radiator resvoir
 

the other day , it was hot roding alittle bit just having some fun . leting the enigne rev hi to redline and all . nothing biog i get home and park in the garage, and i hear this bubling sound coming form the resavoir ???? it was a verry hot day like 95 outside it did this yesterday on me also but i wasnt hot roding. driving normal.

the thermostat is new like 5months old had it replaced with the timing belt,, its a 92 svx with 90k on it.

is it a head gasket blow??
thermostat stuck open?
or is it just a reatrded subaru thing?
im not shure if it has antifreeze in it or not..

thanxs for any help

Oh it might be a problem. I just had a very easy test done on my car to check for CO2. I suggest you find a garage that does this and find out. What do your exhaust heat shields look like?