72HCODE
"My World is Fire and Blood"
Believe it or not that might not happen, what you get is steam vapor leaking out slowly, it causing a really slow loss of coolant that you can not find.
sometimes people put the wrong cap on also.
if you have an original cooling system you use a non-vented cap but they come in 7 pounds and 13 pound calibrations. you might grab a 7 pound cap and discover you are constantly loosing coolant but you can't see a leak so you assume the engine is either eating it (head gasket) or oveheating.
you could of gotten a vented cap by accident also. that would constantly leak coolant from the drain hose because its suppose to. that type of cap is used with the coolant reserve bottle.
now a cap can also go bad over time, so you might have a non-vented 13lb cap that is opening at 10lb of pressure and basically venting the water vapor and making the glycol concentration go up. glycol isn't as good a coolant as water so your engine temp goes up. the glycol is just suppose to mix with water and remove the corrosive effects of water in the cooling system. nothing cools better then water, unless you also add wetter water to the system which changes the surface tension of the water and its suppose to make it cool better. the glycol also prevents the water from expanding when frozen and cracking the block.
so you get this cycle where the cap is venting water, and the coolant is less effective over time which makes the engine run hotter and blow more steam out of the system.
then it may get to the "THERE SHE BLOWS" moment where the cap violently lets the coolant blow out.
years ago i had a car that was like this 1990s Nissan. kept loosing coolant. the dealer was talking head gasket and possible leak in the system. my dad said tell them to just try and change the cap and see what happens. the leak stopped saved me 1000$ of dollars for a 10$ cap.
sometimes people put the wrong cap on also.
if you have an original cooling system you use a non-vented cap but they come in 7 pounds and 13 pound calibrations. you might grab a 7 pound cap and discover you are constantly loosing coolant but you can't see a leak so you assume the engine is either eating it (head gasket) or oveheating.
you could of gotten a vented cap by accident also. that would constantly leak coolant from the drain hose because its suppose to. that type of cap is used with the coolant reserve bottle.
now a cap can also go bad over time, so you might have a non-vented 13lb cap that is opening at 10lb of pressure and basically venting the water vapor and making the glycol concentration go up. glycol isn't as good a coolant as water so your engine temp goes up. the glycol is just suppose to mix with water and remove the corrosive effects of water in the cooling system. nothing cools better then water, unless you also add wetter water to the system which changes the surface tension of the water and its suppose to make it cool better. the glycol also prevents the water from expanding when frozen and cracking the block.
so you get this cycle where the cap is venting water, and the coolant is less effective over time which makes the engine run hotter and blow more steam out of the system.
then it may get to the "THERE SHE BLOWS" moment where the cap violently lets the coolant blow out.
years ago i had a car that was like this 1990s Nissan. kept loosing coolant. the dealer was talking head gasket and possible leak in the system. my dad said tell them to just try and change the cap and see what happens. the leak stopped saved me 1000$ of dollars for a 10$ cap.
