If I find oil on my spark plugs, is that a sign of blown head gasket?
Jan 5, 2010 at 4:48 PM
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BLUELIGHTNIN6
✓ASE Certified Mechanic
16,542 POSTS
Oil on the top of the plug would be due to a gasket or seal failure. Oil on the bottom of the plug would be a more serious internal engine failure.
Jan 5, 2010 at 10:23 PM
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