#29064, "RE: How does a radiator cap raise the boiling point of coolant?" In response to Reply # 0
Pressure baby pressure....I may be 15 but i seen alot of shit...take you mom when she used to pressure cook that roast beef,,,It lowers the boiling point with pressure.
#29067, "RE: How does a radiator cap raise the boiling point of coolant?" In response to Reply # 3
AS far as i know they don't make one for us yet but i could be mistaken. It would help the temps to stay lower but you must make sure the entire cooling system is capable of supporting the additional pressure it will create.Our dinky radiators might not handle say 18psi of pressure in the cooling system but im not sure. An older cooling system could spring leaks like a mofo or blow off a radiator hose from added pressure if you not careful. Someone at school blew the upper hose off a wrx b/c he had a higher psi cap on it and the system pressurised too high for the cheapo radiator he had. SOmebody else can probably answer better.
#29068, "RE: How does a radiator cap raise the boiling point of coolant?" In response to Reply # 3
yes it would help, but i do not know the pressure capacity or our radiators. I put a gst 16 pound cap on mine, our stockers are 13 pounds i think. I was going to get a blitz or greddy cap, but they are 18 psi caps and i do not know if our stocks plastic radiators can handle it. the boiling thing is correct. if you go to a higher altitude say if you are camping and you boil water it will boil before the water reaches 100 degrees C. this is due to the decreased atmospheric pressure acting on the water allowing the vapor pressure of the water to decrease. thus boiling at a lower pressure. so vise versa if you increase pressure acting on the liquid you increase it's vapor pressure making its boiling temperature increase which makes your radiator more efficient. the liquid in your radiator may reach a higher temperature due to this, but it is not turning into vapor. Vapors have very low potential for cooling. Lates james
#29069, "RE: How does a radiator cap raise the boiling point of coolant?" In response to Reply # 5
I bought a STANT Lev-R-vent cap from Advanced Auto and it is a 16 lbs. cap. I don't think it helped to much but the water temp doesn't go up as high. It useually is about 5-7 degrees cooler from before. Not much but a lower degree thermostat will do add some flavor!
#29070, "Some cooling system thoughts" In response to Reply # 6
Everyone should read the http://www.redlineoil.com website. Look under products/waterwetter. Then click on the hyperlink next to the bottle of watterwetter. Read it all.
Numerous people here are using a full gallon of antifreeze everytime they flush their cars. Unless you actually keep adding water to the cooling system during the flush you probably have a 50/50 mix of coolant/water in the rest of the system(after draining radiator). Then you add your gallon of antifreeze to the overflow and the rest of the system. You try to put as much water in there and sometimes you can only get 2/3 gallon of water, maybe less. You now have a system of 60/40 coolant/water. This is not going to help in hot days while you are boosting. Heat transfer is best with water alone. That said, you do need coolant for other things(freezing and lubricant).
I too have had a problem when driving hard in 95 degree temps. I am going to try this. BTW: I use waterwetter also.
2 bottles of Redline waterwetter 1/2 gallon of regular prestone antifreeze The rest distilled water (buy 2 gallons)
I am going to completely flush my system 2 times with clean water and turn on the heater to cycle it through the core. When I am done I will drain everything. Only water will be left in some areas.
This should keep the air cond from freezing any lines and should also be fine for winter months in the south. If it get really cold where you live, just drain some fluid out of the bottom of the radiator and add just pure antifreeze till you get your 50/50 mix.
My car is a 97 and I just ordered a new GS-T radiator cap and upper/lower radiator hoses from satan. My upper one has been expanding slightly and it could use a change. I am not going to modifify the AC fan to come on when the normal fan does unless I have to.
This is a small price to pay for being safe. I would not want to bust a hose(getting old) or detonate due to high temps because I was not willing to spend $50 on my cooling system.
BTW: when your water temps rise above normal, you need to boost lower psi or run higher octane fuel, because of predetonation.
97 RS(PTE SC-61, Built Long Block, Electromotive Tec 3)It's Here!
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