Hello everybody!
I own '93 Prelude 2.2 and have a problem with engine overheating, especialy when driving highways (even driving 90 km/h). In the city streets engine temperature is normal.
What I've already done:
1. Checked radiator. Seems it is clean inside. Corrected it's position (one rubber pad under radiator was missing), and washed it's exterior
2. Changed the antifreeze
3. Checked the thermostat. Its opening ang closing temperature ranges are normal.
4. Both ventilators are working, both hoses are hot, radiator is hot too.
5. Checked for CO bubbles in antifreeze. Test was negative.
6. There are no antifreeze leakage.

The problem was not solved. Any ideas?

Sorry for my poor English

Regards

 

I would check your radiator for hot spots. Got a heat gun by chance? Visually checking it doesnt show you where it might be gettin clogged at. Did you check your fans. But if your going 90kph it should cool down...And you say city it stays normal. Thats odd. Id double check your radiator just in case.

 

you english is perfect ,,

if you have done all those checks and both fans are working, then mayve the radiator is just plugged..

do you have a/c in that prelude, if so is the condesor all smashed and flattened out? the radiator needs good air flow..