Quote:
Originally Posted by JDKane527
If you seal the area around the hose to tank interface, are you also sealing the breather hole at the top of the tank?
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I have looked at the system and cannot see how sealing around the point where the tube enter the top of the bottle can help significantly as the breather hole area is much larger.
I believe that (providing no internal coolant leakage or burping from within) the only way the level can go down is from evaporation via the breather hole. Only a pinhole is enough to allow pressure equalisation to prevent the overflow bottle from ex/im-ploding and another car of ours had only a pinhole. A pinhole could conceivably block I suppose. I have reduced the size of our breather hole with blutac and covered with some foam as an anti-solids (grit,bugs) filter and to slow air rushing past which might speed up evaporation.
To minimise the temperature of the coolant in the bottle I have added an aluminium foil heatshield around the bottle vs engine and radiator radiant heat. There is an air gap between the bottle and shield allowing cool air to convect up inside when the engine is off and condensation to occur earlier. There is an inspection slit to check the level.
"Bloody Hell, but Does it WORK?" I hear your strangled cry. It does a bit... coolant disappearance rate has halved.