My 93 SI has 204,000 miles and runs well. At highway speeds (70-80mph) the temperature gauge will rise on an uphill grade. If I back off on the down hill side the temperature will return to normal. On a hot summer day, I is necessary to trun on the heat to avoid going into the red. I have replaced the radiator and am on my second thermostat.

Any Ideas on a fix???

JPrest

 

are BOTH of your fans working?

 

water pump. check it. Make sure the radiator hose has pressure, if not, the pump might need to be replaced. It's not an expensive part, but its a bitch to fix.

 

I ghetto rigged my 86 integra when it started overheating, I just left the thermostat out, but it took awhile to warm-up and the heat wasnt as hot anymore. On a REALLY hot day in crazy traffic it would still get hot, but other than that it ran fine. not a permament fix tho.

 

lol, mine was doing the saem thing this weekend. The 93's had a slightly smaller radiator from teh factory. I'm upgrading to a teg radiator tomorrow. Sounds like your's might be the water pump. I had been drafting behind a semi going 90-95 for about 40 miles, and it was about 90 degrees out.