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<<I'm told that adding too much oil will do a couple of things, both of them
bad. One, the oil may be inclined to foam, which will reduce its
lubricating abilities. Two, too high an oil level will (I'm told) put oil
against the rear seal or seals where it's not supposed to be, at least not
in that quantity.>>
I can of tell a third trouble that two much oil causes. When changing the oil
a couple of years ago, I was called away to answer an important phone call.
When I returned, I had a "senior moment" forgetting how much oil I had already
added and put in a few extra quarts in my Perkins 4-107. The sump capacity is
only six quarts and by the time I was done it probably had been filled with 9
or 10 quarts. The engine started normally, ran for a few seconds, then came to
an abrupt halt. The starter wouldn't turn it over. The engine was
hydrostatically locked. I guess in this case it should be called petrostatically locked.
As best as I can figure, excess oil was pumped to the valve cover from whence
it was sucked into the intake mainfold via the vapor tube. The only fix was
to remove all injectors to get the oil out of the cylinders. If this happens to
you, DON'T TURN THE ENGINE OVER WITH THE STARTER AFTER REMOVING THE
INJECTORS. It will blow black oil all over the engine room. Suck it out nice and gently.
Larry Z
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