Hello, tried to do some research but can't find any info. I have a mishimoto thermostat, full blown radiator. Can't seem to get heat out of it and i been trying to get the bubbles out for some time now. It has warm air at idle but gets cold air while driving. Bottom radiator hoses are hot while engine is on so I'm guessing the thermostat is opening. Only have 42k on the car and 2k on a built inline pro block. Any ideas? It Doesn't overheat either.

 

Typical symptom of lack of engine coolant.

-- Chuck

 

Yeah you need to do a better job of bleeding/burping the cooling system. Remember to run your heat wide open when bleeding/burping the coolant. One of those large bleeder funnels that hooks on to your radiator cap works wonders for burping the coolant system easily and efficiently. They only cost like $20 on Amazon.