Thanks for the update/info just a couple of things ..
My idea on the radiator is that you may see the top looks okay .but it s the inner coils, that may be plugged .thus causing the overheating. The air should be moving through to cool and the fluid moving through the coils. You might also check to make sure the outside part of the coils is clean to allow good air flow. Many times folks remove them and have a radiator shop bore them out.
Since it is overheating at times ..you did bring up a concern for blowing a head gasket .it if overheats too much ..it will.
Auto Zone is about $248 for one and the Radiator Barn is about $146.
Since one hose is hot and one not, that means the coolant is not moving through your heater core. If it were more constant I would say your core is plugged. It may be partially blocked or .there may be air trapped. I would back flush the core.
So since it was overheating prior to you changing the thermostat etc unless you got air in the system prior something may be partially blocked.
Another thought is your radiator cap if not in good condition it will also make the temp fluctuate.
Me, I would not worry about the exact Honda specific unless your feel it s best. As long as you did a 50/50 mix of the green, that is still good. It needs to be 50/50 though.
Seems like you are doing a good job on the troubleshooting ..I again, am just a little concerned with why was it overheating at times in the first place before you did any work.
My suggestion if you do decide to change the coolant
First, back flush the heater core to ensure good movement of liquid through the core.
Next, new radiator cap and bleed the air really good when you put the coolant in. .
If that doesn t work ..then go with the radiator (I guess as long as you know it isn t the gauge acting up.)
Please keep me posted .want to make sure we take good care of you.
Last, it looks like you may have some recalls on your vehicle. The dealer may fix these for free. Please contact the dealer service department, give them the VIN number of your car and have them check on these to see if they apply to you.
Friday, December 12th, 2008 AT 8:31 PM