Im having problems my car overheating, i dont have any problems untill i start hitting boost, driving with out boosting i have no issue, about 10 sec after i boost the temp starts to rise, and will start overheating. anitfrezze is pushed out to my overflow and not returned,it steams out the top of the overflow where the tube comes in from the rad. Any thoughts on what this could be?

 

Have you changed anything yet? thermostat?

 

no i have yet to change anything i didnt want to start replacing unnessary peices, i did try another rad cap but i still had the same result

 

Could be that boost is lifting your head and causing a headgasket leak.

 

I had considered that as a option, but sometimes when i boost the temp drops right back down to normal, its almost like the colder air from the intercooler is droping my engine temp

 

x2 for head lift



Are you using ARP's or stock head bolts? How much boost?

 

stock head bolts 9 lbs, should i upgrade to arps?, I am running a 60 trim turbonetics t3/t4 full spool is arround 5 grand

 

How long have you been boosting on this motor?

 

4 months

 

It may just be overheating..... how "hot" does it show on the temp indicator??

I def agree with the possibility of the head bolts stretching, but where's all the heat coming from?? It should not be boiling over...... If you are simply pumping cylinder pressure into the water jacket it will blow out the overflow like you're saying but not necessarily get hot.

Correct me if I'm wrong but you're seeing this symptom (temp rising followed by boil-over) several seconds AFTER boosting??