1994 Cadillac Eldorado Q&A
1994 Cadillac Eldorado Question: cadillac overheating still with repairs
A few months ago my car started overheating we changed the thermostat,the radiator (even had it checked for clogs) the water pump, the water pump tensioner and it still overheats at idle when i am driving the temp flucuates between 212 and 221 once it reaxhes 230 driving it will not come back down. It is becoming a headache and all i want is answers there are no leaks and since wee changed the water pump when it overheats it no longer gurgles and spits coolant. WHAT NEXT? - lsimon1983
Is the cooling fan coming on at the right temperature? Does the engine cool properly at freeway speeds when "rush air" flowing through the radiator cools the engine and it is no longer dependent on the electric fan. You have done good basic tests and replaced the key "trouble makers". The most accurate way to test for a blown head gasket on a gasoline engine is to test for the presence of carbon monoxide in the cooling system. Snap-On, Matco (part # CO 2000), and Napa sell a tool to check to carry out this test. Another link to a supplier of this tool is http://www.etoolcart.com/combustion-leak-detector-lis75500.aspx. Carbon Monoxide is only present if there is a blown head gasket or cracked cylinder head. http://www.arrowheadradiator.com/head_gasket_or_combustion_leak_test.htm I think the Napa part number 700-1006. http://www.blockchek.com/instructions.htm . Signs of a blown head gasket are coolant loss (frequently have to top up the coolant level of the engine without seeing an obvious leak), experiencing over heating or rough engine running or the presence of white sweet smelling steam from the exhaust. A badly blown head gasket may allow engine coolant and oil to mix. - patrick mannion
does not do this all the time. some time the care runs great.