1999 Mercury Cougar Q&A
1999 Mercury Cougar Question: Overheating
If you are sure the thermostat, radiator is working efficiently, water pump actually does circulate coolant from the engine to the radiator, and the electric fan operates correctly I would check for a blown head gasket. 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
The composite (plastic) intake manifold may crack near the thermostat housing and cause a coolant leak. Ford released an updated manifold that was reinforced to prevent a recurrence. No recall wa...
I was told my car has a blown head gasket. How do I test it to be sure?
the water pump is good, antifreeze is good. but after i drive for a few minutes it overheats no warm air coming from the heater. is the thermostat stuck or could this be a heat sensor bad?
my car temperature gage is pointing to the middle of the arch. is that normal?
Car keeps overheating.