1986 Ford F-150 engine

Tiny
THEBESTTRUCKFORD
  • MEMBER
  • 1986 FORD F-150
  • 5.0L
  • V8
  • 4WD
  • MANUAL
  • 120,000 MILES
It builds back pressure when it gets warm and I found oil in breather box and it running rough and it blowed the radiator hose off
Thursday, December 11th, 2014 AT 6:38 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
That indicates excessive blowby in the crankcase. Test the PCV system to verify it is working properly. If it is, then you likely just have excessive engine wear letting too much compression past the piston rings.
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Friday, December 12th, 2014 AT 2:56 AM

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