| Jrskygod |
09-16-2016 10:16 AM |
On cars, boats , motorcycles, lawnmower and my airplanes i always drain it hot or at least very warm for the reasons mel elaborated. Its pretty amazing that you can check the dipstick and it looks pretty good after it has set for a week or so but when you drain the oil out its pretty ugly looking. not near as clean as the dipstick showed. If at all possible I always fly or run up the plane or use the engine for the other vehicles and then drain the oil. On my plane while things cool down and the oil is draining it is a perfect excuse to do a quick compression and timing check, clean out the air/oil separator suction tube in the exhaust, mouse milk exhaust joints and just look everything over real good. I takes me just shy of four hours to do the whole thing, cowl off to cowl on and I don't rush things. I generally don't pull the oil screen until annual time unless I find something that doesn't look right in the filter when I cut it.
Once I just pulled the cowl when the oil was cold, drained the oil, changed the filter and put the cowl back on. The plane flew just fine for the entire trip - It was amazing. I was nervous the whole time tho thinking about what i should have checked.
And about that sludge thing - just pull the oil pan on an engine that has 1000 hours or more with regular oil changes. You will be amazed the amount of **** that is in there especially the amount grey lead deposits.
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