1998 Ford F150 Need some help

1998 FORD F-150
165,000 MILES • 6 CYL • 2WD • AUTOMATIC
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EDDYBOY
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  • 1 POST
Hello , I have Question for you guys, i have a F-150 98 165,000 milles but my problem became last month when i tried to do the oil change, The mechanic told me that i have a oil/water mixture all over the oil cap and he told me that could be a mayor engine repair but the funny part is my water is clear and my oil it's the same no mixing in the engine at all , I replace the valve cover gaskets , the pvc valve and the intake gasket but the problem came up again. the test the truck with the computer and it just show a have 3 oxigen sensonrs bad my engine is running to lean. This could be the problem of that mixture on my oil cap ????

Please help.

By the way it never overheat and runs fine
Nov 4, 2008 at 10:41 AM
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BLACKOP555
  • ✓ASE Certified Mechanic
  • 10,386 POSTS
  • ASE Certified Mechanic
could be a cracked head, blown headgasket or a leakin intake manifold or gasket.

due to the o2 sensors reading bad could be connected to the antifreeze and oil mixture. that could indicated antifreeze being burned and when it gets on teh o2 sensors it contaminates them and ruins them causing them to read lean.
Nov 4, 2008 at 1:11 PM
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