Just from owning many other Diesels, if it starts easily, doesn't smoke excessively, or have excessive blow-by, then there is nothing wrong with it. Oil consumption
is almost irrelevant. I've seen nearly new engines use a quart of oil
every 10 to 20 hours or so and that never change over thousands of hours, in fact there is a lot of evidence that once an engine
begins to consume oil, the upper cylinder wear rate is greatly reduced.
There can be a considerable difference between testing compression on a hot and a cold engine
as well as cranking speed will influence compression numbers, the more blow-by, the lower the numbers will be if cranking speed is low. A leak down test like what is done on aircraft engines will tell you much more, like where the loss of compression is coming from by simply listening for where the air is escaping. Exhaust
, intake or crankcase breather.
But, the acid test in my opinon, is if it starts easily, runs well and doesn't smoke excessively, what's to fix?
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