Oil burned on plugs fouling issue.

Discussion in 'Troubleshooting & Diagnosis' started by Beaber89, Mar 6, 2018.

  1. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

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    Did you have this rebuilt at a reputable shop - is going back to them an option?
     
  2. Beaber89

    Beaber89 New Member

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    Unfortunately this rebuild is two years old so I don't believe it's in any warranty. I just don't drive it much is why the miles are around 1000.
     
  3. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

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    It won't hurt to call the guy and let him know what's going on. He might be helpful, even after a couple years.
     
  4. RS1979

    RS1979 Veteran Member Lifetime Gold Member

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    It's worth a shot. All he can say is no.
     
  5. Beaber89

    Beaber89 New Member

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    Compression tested on a few cylinders ran compression on 2, 6 and 8. 2 is 155 6 is 155 8 is 151 roughly . The gauge was bleeding itself off. The intake valves are gross on all of them likely from running nasty rich for a while. But I'm looking at the runners of the heads on 6 and 8 now. There's a good obvious difference between them. Looks like 6 may have been dragging oil in through the intake gasket but I'm not really experienced enough to say. What do the fellas think ? Pics are sideways but hopefully you can tell
     

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  6. Beaber89

    Beaber89 New Member

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    Or their not sideways but upload showed it sideways
     
  7. 74BIBELOT

    74BIBELOT Veteran Member

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    Check the spark plugs wires or change 6/5 wire.
     
  8. Beaber89

    Beaber89 New Member

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    Wires are new 9mm firepower by Taylor cable. Distributor is new, I checked the cap for bad posts on 6 and 8.
     
  9. cadillac_al

    cadillac_al Veteran Member

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    It sounds like a simple intake gasket failure to me. I'm pretty sure your builder will say the same thing. Why is the question. Was it a cheap gasket or an old used intake manifold or were the heads shaved altering the mating angles?
     
  10. Z28zz383

    Z28zz383 Veteran Member

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    Are those "vortec" heads? If so you may need the GM gaskets. I tried the reg blue type gaskets on my ZZ 383 with fast burns and had similar issues until I used the GM vortec gaskets. Stopped my intake leaks. Big runners are not giving much sealing surface from what I can see from the pics.
     

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