stupid rad cap Question
#6
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For the umpteenth time, all a high-pressure cap does is increase the coolant's boiling point. At 13psi the boiling point is already way higher than you should ever let the engine get, so more pressure does nothing but increase the likelyhood of a 15+yo hose popping. Higher pressure does not increase the cooling system's capacity and will not help an overheating problem if you have one.
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Originally Posted by NZConvertible
For the umpteenth time, all a high-pressure cap does is increase the coolant's boiling point. At 13psi the boiling point is already way higher than you should ever let the engine get, so more pressure does nothing but increase the likelyhood of a 15+yo hose popping. Higher pressure does not increase the cooling system's capacity and will not help an overheating problem if you have one.
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#8
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I have no idea why higher-pressure caps are available. I have yet to hear even one half-sensible explanation for running higher pressure. Personally I think they're just an excuse to buy another overpriced brandname part.
#9
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Hey guys, just last week I bought two 15 PSI caps from Pepboys and YES is does cause problems. I was driving on the highway and suddenly my Temp gauge starts to spike (about half way, I have a S4). I pulled over and idled for a five minutes and my engine cooled back down. When I got home I inspected my engine and saw that the coolant hose at the back of the engine had been leaking. It’s the one that connects to the throttle body to the water pump. Hence, I tossed the Pepboys caps and shelled out the cash for the Mazda caps. NO PROBLEMS SINCE...
#11
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Originally Posted by Badmofo3000
Hey guys, just last week I bought two 15 PSI caps from Pepboys and YES is does cause problems. I was driving on the highway and suddenly my Temp gauge starts to spike (about half way, I have a S4). I pulled over and idled for a five minutes and my engine cooled back down. When I got home I inspected my engine and saw that the coolant hose at the back of the engine had been leaking. It’s the one that connects to the throttle body to the water pump. Hence, I tossed the Pepboys caps and shelled out the cash for the Mazda caps. NO PROBLEMS SINCE...
On another note, I would wonder about the condition of the hoses.
#12
Easy answer to why they sell higher psi caps... money! There is enough dumb@sses in the world that would go out and buy a quick fix than spend the time and money to just fix it right the first time.
It can't be helped... some people in the world are just idiots.
It can't be helped... some people in the world are just idiots.
#14
The mystery of the prize.
it's not a money grabber, increasing the boiling point is useful.
you can run a mix with more water and increase the boiling point with the upped pressure which the antifreeze would normally have done.
increased pressure will also help prevent localized boiling @ hot spots in the engine.
you can run a mix with more water and increase the boiling point with the upped pressure which the antifreeze would normally have done.
increased pressure will also help prevent localized boiling @ hot spots in the engine.
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Originally Posted by pengarufoo
you can run a mix with more water and increase the boiling point with the upped pressure which the antifreeze would normally have done.
If you can't keep your enigne cool with a 50/50 coolant mix and a 13psig cap then something it wrong. Either something needs to be fixed or you've reached the system's capacity and should upgrade.
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