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leakdown

  1. Interpret compression and leakdown numbers

    NG900 & OG9-3 Workshop
    Problem- excessive oil consumption -2000 SE Compression Cyl.#1- 155lb. Cyl.2 150lb. Cyl.3 200lb. Cyl.4 160lb. Leakdown_ #1 55% #2 60% #3 65% #4 50% Cyl.3 piston wet with oil (did not pour any in) new valve stem seals, new PCV. Whaddya think? Bad rings or cylinder #3? Maybe try 10w 40 or...
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