Sounds like a problem in older wet sleeve engines called hydraulisis. The sleeves actually strech and contract when the cylinder is in the Power Stroke. When expanded on the rod thrust side the sleeve pushes coolent away, when it contracts it causes a void and air bubbles form on the sleeve. When the power stroke occurs again the air bubbles explode working simular to a water jet cutter. Anyone who has ever rebuilt wet sleeve engines has seen this pitting on one side of sleeves. Todays modern engines now support the sleeve midway down rather than the bottom to reduce this problem. O ring deteriation is a result of movement of the sleeve base grinding sediment between the block gland, O ring, and the sleeve. This lower sleeve movment could also cause the top sleeve gland to crack on some engines. Coolent filters and chemical treatments were developed to reduce this phenom.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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