fuel in crankcase

1991 CHEVROLET S-10
230,000 MILES • 6 CYL • 2WD • AUTOMATIC
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PISTONHEAD43
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  • 1 POST
i have a 1991 chevy s10 with a rebuilt tbi 4.3(not vortec) and one day i cranked the motor and i heard an explosion. it was caused by gasoline getting in the crankcase and then it ignited. when i changed the oil i noticed that the oil was REALLY thin almost like water. it bent the valve covers out. for a while now i have noticed that the oil level was getting higher and higher and i didnt even add oil to it. i replaced the valve covers and the oil and now the crankcase is filling up on its own again. do you know whats causing the crankcase to fill with gas?
Feb 11, 2011 at 12:10 AM
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FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
must be sucking it in from somewhere like charcoal canister?
May 3, 2011 at 3:17 AM
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FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
if it has fuel injection the lines under intake are leaking.
May 3, 2011 at 3:20 AM
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