cracked block ??? on 2001 Chevrolet Monte Carlo

i would like to know what are the symptoms of a cracked block i hit a pothole (hard) since then coolant loss,running hot, overheating, hard to start,and when i pulled out the oil dipstick it looked like water was mixed in.... thank you for your help.....rick B.

by in Clermont, FL on September 13, 2010
2 answers 2 comments
ANSWER by on September 14, 2010
The way an automotive shop would locate the leak is by removing the radiator cap and attaching an adapter that screws on in place of the radiator cap. Something that looks like a bicycle pump with a pressure gauge attached to it is used to "pump up" pressure to simulate pressure generated when the cooling system is at operating temperature, the leak is then found sometimes it is obviously leaking from a coolant hose or cracked housing, failed gasket or water pump, sometimes the engines cooling system needs to be inspected from below or inspected using a mirror and flash light. Over heating could be caused by many things but your symptoms described sounds like 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 Carbon Monoxide is only present if there is a blown head gasket or cracked cylinder head. I think the napa part number 700-1006. . 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.
COMMENT by on September 14, 2010
thank you Patrick.... that was very helpful..... Rick B
ANSWER by on September 14, 2010
Once the oil mixes with the coolant and starts to get a "milky look", it wipes out the Crank & Cam bearings in no time. You will be better off replacing the engine at this point.
COMMENT by on September 28, 2010
if i do need a new engine what can i expect to pay for parts and labor.........Rick B
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