Subaru Impreza GC8 & RS Forum & Community: - View Single Post - Weird Overheating Issue
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Old 02-10-2009, 04:58 PM  
2.5L RS-T
Car: GF OBS-T, GM RS EJ20, SF EJ20
Fav Mod: EJ222+10psi=12.89s 1/4
Join Date: Jul 2006
Location: NYC
Trader Rating: (58)
Posts: 4,973

Had the same problem.

Scangauge water temp would creep up towards 200* on highway cruise, temp gauge would not move because I pay attention to my gauges - but downshifting & flooring the car would bring temps back down to the 170*-180* range.

I put a BIG Koyo Radiator in & STILL had the same problem.

Then I changed the Crucial Racing thermostat in my car for a stocker & problem was Solved.

Now HW cruise @ over 50 mph will have coolant temps in the 120* range which is not good - so I have to put a piece of cardboard over the radiator ice road trucker style to keep coolant temps up.
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