Recently they replaced my stock radiator with aftermarket one (at dealership, so I hope they knew what they were doing), and since then I feel that a car is not warming up enough.
Even if I warm it up completely at garage - as soon as I start driving temperature drops. Driving at high speed drops it even more, when temperature outside is cold it gets worse too. I don't have precise temperature gauge though (only 4 digital bars on gauge) so I can't be sure.
This new radiator is smaller/thinner. Can a radiator be too "good" and cool down a car too much? Thermostat should completely disconnect radiator from the circuit if a car is cold, isn't it?
(at dealership they say it all behaves as it should, car is not over-cooling)
Car in question is Honda Prelude'92.