Originally Posted by Alfred5279

no special equipment needed to do the flush. i think it just has bubbles in it. I never really opened the bolt on the block. I dont think its absolutely needed.

After adding fluid, you should start up the cold engine and leave the radiator cap off. Wait for the engine to get hot (about 15-20 min should be good) so that the thermostat opens up. You should see bubbles come up. Add more fluid/water as needed, then cap it off.

some hondas have a bleeder bolt at the end of the top radiator tube. I never use it. In fact i dont really know the proper way to use it. i believe you can bleed bubbles there too. but be carefull, the water is boiling hot, dont get splashed.

also note: DONT take off the cap on a hot engine. wait for the engine to cool, take the cap off, THEN start the engine, and wait for bubbles to come out.

Another problem could be that the thermostat needs to be changed. Check you manual for suggested change intervals.

I usually change my thermostat 40,000 miles or every 2years for the amount of miles i drive.