Removing stuck fasteners

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 ==Penetrating and lubricating oils==
 Penetrating oil is an extremely low-viscosity oil that can penetrate into the area between threads on a fastener. A stuck fastener is often heated, sprayed with penetrating oil, and then tapped with a hammer.
-Some comments on penetrating oils.  WD-40 is not a penetrating oil, it is a corrosion preventative.  There is problem with the idea that penetrating oils can penetrate rusted together parts.  I have done some testing.  For a whole week I put Kroil on head studs.  I then pulled one stud from the head that felt like it wanted to come.  As I suspected, it was dry.  If the bolt is free enough for penetrating oil to seep through then it will come out without any oil.
-If you really want to get studs out you need to use shock (hammer hits) and or careful application of heat cycles.
 Some penetrating oils that are recommended by hotrodders:

Revision as of 19:20, 14 November 2008