Re: Illicit Pleasures.

["Jan Wikström" <104707.3644@CompuServe.COM>]

Message text written by "Mark Revels"
>I've seen oil back-up cylinders advertised that keep a reserve slug of oil
ready in the event pressure drops out. Don't know if they work.<

Let's not get paranoid about oil pressure. Brief drop-outs (running into
minutes) do no harm at all; it's not the pressure shown by the gauge that
is maintained in the bearing; the dynamic pressure where the lubricant
takes the load in the bearing is actually much higher. The pressure gauge
is only a diagnostic guide to bearing condition; I remind you that most
cars (and motorcycles) don't have one. That's the factory's way of saying
that the oil pressure doesn't matter as long as the red lamp doesn't come
on.
To put the oil matter once more into perspective: I have a portable
generator with a Honda OHV engine. This engine has a plain big-end bearing
formed in the connecting-rod metal. It's splash-lubricated; oil thrown up
from the sump enters, probably only while the rod accelerates upwards,
through a small hole at one side where the straight part of the rod begins.
I used this generator for four years while living in a caravan (trailer).
It clocked up 20,000 hours @ 2,400 rpm and the rod was still OK. All the
engine needed was a set of rings and a good valve-grind.
-Jan

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