need alittle help with my S ..ok so its building pressure and gettng hot ..it dont show to be hot on the gauge..the top hose is hot but the bottom hose is cold also my heater does not get hot..not even warm ...i just replaced the thermostat.. and still the same thing ..could the waterpump be bad ? its not leaking and theres no noise coming from the pump

 

Air in the system from doing the t-stat job, guaranteed.

Find my post on S2000 coolant bleed.

 

well i tried for over an hr the heater is now getting hot but the lower hose is still cold

 

A say u got a defective thermostat since u already bleed the air. Or did u even waited long enough?