jessmansweet

Just for clairity sake...The coolant has NOTHING to do with the wp bearings. Once the coolant/antifreeze-water get to the wp bearings there done for. It also means the seal is leaking and your loosing coolant. MABYE its better for lubing the wp SEAL but I think you will never be able to tell if the seal failed from using straight water or failed from something else. I saw the bearings mentioned at least 2 times and wanted to keep bad info from spreading.

2002_Z28_Six_Speed

iTrader: (19)

If your radiator cap is rated for 15 PSI...

14.7 is about 1 bar so assume 1 bar

At one bar of pressure water could vaporize as low as 212 and we have to assume that unless you know the total volume.

If we assume the radiator cap can handle 1.5 bar or 22.05 PSI then the min temp for steam has only increased to 248 degrees F!

That was using table values that would guarantee all steam.

If I wanted to use the Saturation temp I would say that a partial steam mixture could form at as little as 232 at 1.5 bar and 211.34 at 1 bar.

Personally, I am sold on that it could happen. I looked that up in a Thermo table BTW.

cantdrv65

iTrader: (3)

Thats incorrect. The atmospheric pressure is 14.7 psi where H2O has a boiling point of 212....like on your stove. If you have a 15psi rad cap add 15 to 14.7...Now look up the BP at 29.7 psi on the chart. (about 250F) This will of course vary slightly with altitude. In short the rad cap is rated at psig not psia.

That being said yes a 50/50 coolant/water mix will raise the BP to about 265F. Again Im not recommeding anyone run pure H2O permanently, it can cause deposits without the coolant. Though it does have better thermal transfer characteristics.

Did I mention Dexcool sucks! I'll never let it stay in my cars. I use the universal from O'reillys.

2002_Z28_Six_Speed

iTrader: (19)

Then that would be at about 250 but slightly under. Depending on if the cap is rated at gauge or absolute pressure. If it is rated at gauge pressure yea thats going to be an explosion hazzard!