Ive got a question.
Is a B18c water pump designed to only work properly with a B18 radiator???
reason i ask is that ive used a stock civic radiator and a alloy aftermarket one and the temp keeps creeping and creeping up to 100+ when driving but if the leave the car idling the temp doesnt move (up or down)
and even with my Integra radiator the temp stayed low 90s high 80s( and that radiator leaks)
the stock eg radiator doesnt leak and the alloy radiator is brand new.
Ive used just dist water and coolant aswell and same results..

My theorie as stupid as it may sound is the water pump moves the liquid too quik throught the smaller radiators and doesnt give it enought time to cool down, and maybe thats why when the car is stnding still if stablelises, and the temp stays lower with the integra radiator because its bigger and it takes longer for the liquid to run throught...

Is my theory correct or is there another explanation.. has any one enqauntered this wierd prob??