air filter

1999 TOYOTA TACOMA
150,000 MILES • 6 CYL • 4WD • MANUAL
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TONYJAMES1202
  • MEMBER
  • 1 POST
why is there oil in my engine air filter
Apr 19, 2011 at 11:41 AM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
That is usually the result of excessive pressure in the crankcase. This could be due to a PCV system not working properly to remove pressure or there is excessive piston ring wear creating more pressure than the PCV can handle.
Apr 19, 2011 at 1:51 PM
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