142k, very clean car w/perfect paint and body, many extras/upgrades- the catch- runs and drives very well right now, but found out there is water passing thru #3,4,and5- possible blown head gasket or cracked head. rough idle for a few seconds in morning is only symptom- not using coolant, no water in oil. don't want to tear down to see, cant afford to fix. car in sf, ca.