Quote:
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Originally Posted by Jaxonalden
A 1:1 mixture of ethylene glycol based anti-freeze and water raises the boiling point of coolant to 225 degrees, from 212 of straight water.
A 15 psi coolant system in turn raises that same coolant boiling point to 265 degrees.
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In my post above, I meant to say that pressure as well as antifreeze work to raise boiling point.
Aside from the temp/pressure and boiling point discussion, this problem reminds me of an old BMW I formerly owned (84 533i) that used to overheat frequently. After replacing all the obvious cooling system items, which did nothing, it turned out that the cylinder head was cracked and allowing exhaust gasses to enter the cooling system, thereby causing an air break and boil over.
Any chance this Boxster has a cracked cylinder head causing a similar problem?
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