so i swapped a high comp b20 into my crx and its overheating. i have a new radiator, new water pump, new thermostat. any ideas?

 

even at normal running temp the heater is still blowing cold air and even when it starts to overheat its still blowing cold

 

Did you try the thermostat?
Did you bleed the coolant?

 

i tested the thermostat and it opens and i did bleed the coolant

 

do your fans come on?

 

i dont have fans.. but i have never had fans on any of my swaps. this is my 6th or 7th swap. i have never had this problem before. its 20 degrees out side right now and i cant even drive a block before it wants to heat up

 

radiator seems clogged
How old is it?

 

its pretty new maybe 5 months old is all

 

Have you checked the TSU?

Is the ECU tuned to run this engine?

 

yeah its the same ecu i used before. sorry but whats TSU

 

Here take a look at this...

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/temp-sensor-3007306/

 

You're saying you have no radiator fans nor have you had any radiator fans on 6 or 7 swaps and you've never had overheating problems on any but this one?!?

 

must never let his car sit at idle for very long ha