Re: temp gauge spike
 

is your radiator fan working? i guess that wouldn't matter on the interstate so much, but its something simple to check i guess. what mixture of coolant are you using? 50/50? because you could try like 30/80 coolant/water with some redline water wetter and see if it helps any??

Re: temp gauge spike
 

is the rad in ok condition or are half the fins missing from a 10+year old rad? Sounds like the heat is not being exchanged to air (because it goes down w/ the heat on).

Re: temp gauge spike
 

has anyone experinced this after installing an intercooler? cause it does block the airflow a little. but it flows through....i don't know.

Re: temp gauge spike
 

any other thoughts?

Re: temp gauge spike
 

well i never had any problems but if its only running a little hotter, that could be the case. what size rad do you have on what engine? and what size intercooler?

Re: temp gauge spike
 

half size single core, D16Z6, and the johnny racer 5"

Re: temp gauge spike
 

how about using 5W20.......ever heard of adverse effects of using a lighter wieght oil?