Excessive blowby, exhaust smoke?

Discussion in 'Street/strip 400/430/455' started by CIT, Jul 9, 2004.

  1. CIT

    CIT Poweraddict, help me

    Excessive blowby, exhaust smoke on acceleration
    One very black sparkplug.

    I'll say pistonrings :mad:
    Just about broken in at 700 miles, but I guess they are just broken

    Any other suggestions?

    Time to pull the motor again I think, 3rd time in 6 weeks :af:

    At least I'll get to retorque the bottom end and check the bearings
     
    CIT, Jul 9, 2004
    #1
  2. tommyodo

    tommyodo Well-Known Member

    Molly hone w/ cast rings. vice versa. sounds like it won't break in.
     
    tommyodo, Jul 9, 2004
    #2
  3. CIT

    CIT Poweraddict, help me

    Didn't have any problems previous 700 miles.
    Smoke and blowby just started
     
    CIT, Jul 9, 2004
    #3
  4. CIT

    CIT Poweraddict, help me

    Turns out it was a headgasket.
    Lucky me pulled the motor before taking the intake off :Dou:
    I checked the rings anyway, but they look fine.

    Just hopes the new cheapo gasket will hold until winter.

    Guess it's time to find a new mechanic, I suggested headgasket, he said no way, it's the rings :blast:
     
    CIT, Jul 12, 2004
    #4
  5. 68 LeSabre 4dr

    68 LeSabre 4dr Well-Known Member

    Peter , It sure could have been worse . Glad ya got it ! :beer :TU:
     
    68 LeSabre 4dr, Jul 12, 2004
    #5
  6. CIT

    CIT Poweraddict, help me

    Problem is back. This time it's the other bank.
    Last it was #4 this time #3
    Must be some crappy headgaskets I got with faulty firerings.

    Stay away from ROL gaskets :Smarty:
     
    CIT, Jul 17, 2004
    #6

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