Another possabilty which has not been mentioned is you could have a blown head gasket. In such a case even a perfectly good radiator cap will allow the coolant out along with the excess pressure from the combustion gases. Simple to test for. A car which is losing that much coolant should not be driven. You will damage the seal in the water pump if you haven't already and you are taking a BIG chance of overheating the motor and if you haven't popped the head gaskets eventually you will. Any leak that is losing that much coolant shouldn't be hard to find. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "John Macias" <jdm5@xxxx> wrote: > > Could be: > 1. A bad seal and the coolant is seeping into the engine. Check the > look/quality of your oil. Possible, but not likely. > 2. A slow leak when hot. Rubber expands and softens when hot. You > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/