Question about 2000 Pontiac Grand Am GT
The symptoms you describe is most likely caused by a blown head gasket. The only time the oil will become milky white is when coolant enters the crankcase. It is possible for a head gasket to fail and not contaminate the oil. There are various ways to determine which bank has failed. The method I prefer is to remove all of the spark plugs but keep them in order, so you know which spark plug belongs to which cylinder. Examine them, spark plugs from a properly running engine should look almost identical. Take a look at this link, NGK how to read spark plugs faq, your spark plugs should look like the one in the first picture. The spark plug from the cylinder that is burn coolant will not look like any pictured in the link. It will look cleaner than the normal spark plug because the coolant will cause a steam cleaning effect on the spark plug. Another method is to remove all of the spark plugs and crank the engine. Look for signs of water or vapor being expelled from the spark plug bore. An extension of this method is to stuff a wad of paper towel into the spark plug bore just enough to cover the bore. Hold it in place with a screwdriver or wooden dowel and crank the engine. Than examine the paper towel for the presence of moisture. Both of these methods work better when the leak is pronounced, not so much if the leak is in its early stage or small. I do not use this method because I find it unreliable and inconsistent but it does work for many individuals. The other option is to replace the head gasket for both banks, but that would increase the cost of the job.
Posted on Nov 10, 2010
First make sure the cooling fan is working, the remove the spark plugs for inspection, if any are whitish in color you probably have a head gasket leak, and make sure you are running enough anti freeze
Posted on Nov 10, 2010
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Posted on Jan 02, 2017
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