overheating only on the freeway under no boost
 

here is what it does. when i am driving at about 65-70 mph or faster for a while my temp gauge will rise even when i am not in boost. if i open the heater core the temp will slowly drop to normal. my car does not overheat no matter how hard i drive when i am not on the freeway. i have a turbo gsr in a vx hatch. i have the spoon temp switch and thermostat. do i just need a aftermarket radiator or could i have a problem elsewhere??

Re: overheating only on the freeway under no boost
 

blew a HG.

Re: overheating only on the freeway under no boost
 

i have no mixing of fluids and it does not overheat when i am on it only at freeway speeds

Re: overheating only on the freeway under no boost
 

does it start overheating if you let it sit idle in your driveway?

still think its the headgasket.

Re: overheating only on the freeway under no boost
 

no the only time it will overheat is on the freeway with no boost at about 65-70 mph.

Re: overheating only on the freeway under no boost
 

that's odd.

a completely stock honda cooling system should have zero problem cooling a basic hmt turbo setup. I'd suggest starting small and easy. Replace the t-stat, and rad cap. If the problem persists, then look back to your headgasket.

Re: overheating only on the freeway under no boost
 

take ur t stat out n put ur fan on constant =x i had that issue with my teg on freeways, put the bitch on constant and it never over heated again. everyone kept tellin me it was the hg as well. i to had no mixing fluids

Re: overheating only on the freeway under no boost
 

Niether did I, no smoke, no nothing, I denied everyone saying it was th HG until one day I replaced it and all was well.

Re: overheating only on the freeway under no boost
 

do a compression test, if its not your hg do what turboda6 said and hook up your radiator fan to switch, or if your cheap hook it up to your radio fuse :P one side of my radiator is completly toast (bent fins) from my last turbo setup, it used to overheat untill i started using the radiator fan constantly. It used to go up to 230 degrees now it stays around 165-175 with an OEM therostat! They work miracles :D

Re: overheating only on the freeway under no boost
 

id get a bigger rad...i had the same problem after i swapped in my b16 with a turbo. Only got hot at high rpms on the highway, and i know for sure that the hg was good (because i did change it). My solution was to just live with it getting a little hot and not drive so fast lol.