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Fuel in crankcase

Tiny
PISTONHEAD43
  • MEMBER
  • 1991 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 230,000 MILES
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?
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Friday, February 11th, 2011 AT 12:10 AM

2 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Must be sucking it in from somewhere like charcoal canister?
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Tuesday, May 3rd, 2011 AT 3:17 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
If it has fuel injection the lines under intake are leaking.
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Tuesday, May 3rd, 2011 AT 3:20 AM

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