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Now, I know you guys are into radiator caps, right? I mean, they must be what, second only to a SAS on the mods list? Sarcasm off. Seriousy... the stock cap is good for about 13 psi... grab the ND cap from an Isuzu vehicle, fits right on, and you'll gain a whopping 2 psi increase in pressure up to 15psi. Keep your coolant where it belongs. Also, the seals are made from silicone, so it should last longer.

Sorry if this is old info.

Brian
 

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Originally posted by Bjowett:
<STRONG>Now, I know you guys are into radiator caps, right? I mean, they must be what, second only to a SAS on the mods list? Sarcasm off. Seriousy... the stock cap is good for about 13 psi... grab the ND cap from an Isuzu vehicle, fits right on, and you'll gain a whopping 2 psi increase in pressure up to 15psi. Keep your coolant where it belongs. Also, the seals are made from silicone, so it should last longer.

Sorry if this is old info.

Brian</STRONG>
Not quite sure I understand. Why is this an upgrade? System was designed to release pressure at 13 lbs. Why change it?

bobby
 

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Yeah, since it's a 13lb. system and you increase it to 15lbs., wouldn't that increase the chance of blowing out gaskets and/or seals?
 

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Ya..what they said, dont want the extra pressure, its 13 lbs for a reason. Last of my worries. <IMG SRC="smilies/beer.gif" border="0"> <IMG SRC="smilies/beer.gif" border="0">
 

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Here it is as I understand it...

The increase from 13psi to 15psi effectivly raises the boiling point of your coolant thus decreasing the threat of overheating. I can't think of any seals or gaskets in the system that this minimal increase would effect. In my Chevelle I used to run a 21psi system with a stock waterpump and hoses and I never had an issue.

Most people think that waterpumps fail because the pressure eventualy causes them to leak. In actuality what causes them to fail is the sideways force applied by the belt. That is why some auto manufactures are now using gear driven water pumps that are now lasting the life of the engine.

Like usual I could be wrong or on crack....that's just the way I understand it...
 

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Yes...changing from 13 to 15psi caps will increase the boiling point. For every 1 psi you raise the pressure, you increase boiling point 2 degrees.

So instead of 238* boiling point, you will have a 242* boiling point. Not much of a gain.

This does not increase cooling at all. It only holds hotter water in the cooling system longer. This can cause failure of gaskets and hoses and such.

I don't recommend the change in cap personally. But it probably wouldn't cause a problem.
 
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