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Old 10-20-2015, 06:37 AM   #5
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Join Date: Nov 2006
Location: In the garage...
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First step would be to lift carpet/floor in trunk looking for coolant. If present, one issue you have will be cracked reservoir tank (very common - even not knowing your MY). If none there, then move on to a quick pressure test on system. This will point you in right direction.

Most voids in a closed loop system (tank, H2O pump, cracked rad, etc.) provide you w/ 'opportunity' to drain and refill system. Don't waste time doing until you find source which allowed air to enter causing boil over. At ~ 6 gal coolant, your H2O added (unless more than a gallon) did little to affect boiling or freeze point. Every pound of pressure on coolant effectively raises its static boiling point ~ 3° thus why w/o it you get boil over...

Good luck
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Last edited by Burg Boxster; 10-20-2015 at 06:54 AM.
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