Heater blows cold airr
#31
I had this problem but found the gasket on my radiator cap was torn and pressure was escaping, I since replace the radiator cap with a new oem one and the heat now works, however when I come to an idle it seems to still blow cold air, not sure what that’s about. Maybe still air in the system?
#32
It's the heater core Mr. Sorry to say but I just cut mine apart and those heater core passages are so tiny! I think Honda needs to recall the S2000 and replace every heater core! I changed my coolant often and mine still clogged up. My coolant has always looked very pretty and I used top shelf coolant conditioners like BG's coolant conditioner. Now it's not the additives fault, it's those super small passages that a tiny piece of scale would clog up. Also check the two aluminum lines on your firewall for corrosion. You may need to change them as well. Good luck!
#33
^^^ hmm interesting, sorry to hear of your issue there, was it a bitch to get to the core? I'm not even sure where its located. Anyway my problem of blowing cooler air when at idle went away, i think I just had air bubbles in the system from the fuqed up cap I replaced.
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