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Bad Valve Seals?

Discussion in 'General Tech and Maintenance' started by 94tuner, Jul 13, 2011.

  1. 94tuner

    94tuner New Member

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    I have a 92 cx hatchback with a jdm 1.5. The car is smoking REALLY bad when i get on it from about 3k to redline. Kinda a grayish black smoke. Ive heard several reasons why this is happening...valve seals, head gasket, piston rings. It is also using a little bit of oil. Any ideas where i should start or anyway to determine what needs to be replace without removing anything?
     
  2. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Compression test and leakdown test.
     
  3. RHDism

    RHDism Right Hand Drive guru

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    Oil is going to be more of a blue tint smoke, to where greyish black is un burnt fuel.
    May also be a combo of both. You may be burning extra rich. What is your fuel mileage at?
     
  4. 94tuner

    94tuner New Member

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    Im going to do a compression test soon. The gas mileage is still really good around 35+. Check the plugs no discolor of any kind. Could my exhaust be involved with this the previous owner put 3" pipe w/o cat to a 4.5" skunk2 muffler?
     
  5. luky1380

    luky1380 New Member

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    how many miles on the engine
    could be valve seals for grayish, for black- fuel mixture is to reach
    try to put some premium fuel in it and BG 44K or other injector cleaner maybe even put some gasdry in it and try like 20w50 or 15w40 oil that may help too
     
  6. 94tuner

    94tuner New Member

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    Not sure the mileage of the motor i do know that the body has 130k
     
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