apex2k

Me too, just checked. Definately more green-ish than bue-ish. Keep in mind I am expecting Porwerade Blue so maybe it is me.

xviper

I've seen the Type II that's already in stock S2000s. It's green. I've never seen the pre-mixed stuff that Honda sells.

Billman250

Factory type2...dark green

Off the shelf.....blue

apex2k

Nothing like keeping things simple - ish.

This sounds like something GM would do, not Honda.

jakub2000

Is that true? The reason I am asking is, after my radiotor was replaced with a bigger one and I had to refill the coolant, I put 1gallon of some blue coolant.
Since the new radiator is 3 times bigger, I had to put one more bottle of something different that was on hand (orange!) just to top it of with some green stuff a week later. Never thought about mixing it with water

So I have flushed the whole system 4 times as per your instructions because I was having overheting issues and would like to know if any possible GEL that might have formed could cause my present overheating issues while cruising speeds.
I have refilled with a fresh 50/50 mix of some local green stuff and had to mix with tap water, since all workshops do it here this way (even Honda) and a term destilled water does not exist in this part of the world. They call it battery watter and it is sold in small bottles the size of a beer can, but thats not pure H2O let me tell you. Even the manufacter of the cooland states in the directions of use to mix with tap water
I have flushed till it ran 95% clear and toped it off the next day with some clear coolant since the level went down. Still overheating

xviper

This hard to say. Did you ever have the thermostat checked or replaced? It is well known that "normal" coolant and "long life" coolant should not be mixed because of an adverse reaction with each other. I suppose it's possible that it could have caused a build up that interferes with the flow of coolant through the thermostat. Overheating during cruising is a sign that coolant is not flowing adequately. This could be from a blockage by thicker material or from an air lock. You could also have a water pump that doesn't work well.

ps. It indicates that you have an '03. That year came with Type II (long life fluid) in the cooling system.

Metalhead

So how long should it last?
For the record, the temperature extremes that I subject my '03 S to are from around 10 degrees, to around 110 degrees.
Thank you, xviper.

xviper

The original Type II coolant that comes in the S2000 is listed in the service manual as needing replacement at the 10 year mark. Personally, I wouldn't trust any coolant to last that long. If it were my car, I'd change it out after 5 or 6 years.

I've only run my car in temps just over 100 degrees. I did notice that the coolant temp does get very hot (but never more than 3 bars on an AP1). As long as I was cruising at highway speeds, the temp was reasonable at about 200 to 205, but as soon as I slowed down to city speeds, the temp climbed to maybe 230. This was still 3 bars and I've never seen 4 bars as some owners have reported. I did discover though, that during such hot weather, if I activated the A/C and left the fan on only the 1st or 2nd setting, the coolant could be brought down about 10 to 15 degrees. When the car slows down, the amount of air going through the rad decreases. Activating the A/C turns on both rad fans to keep the air moving. Keeping the fan low reduces the amount of heat exchange in the HVAC system. Less heat exchange, less work, less engine heat buildup, not quite so hot coolant.