On Wed, Sep 19, 2012 at 10:38:24AM -0400, Norm wrote:
>
> Ahoy All,
>
> > The pump feeds the engine oil through
> > a plugged hole I found in the oil filter adapter.
>
> Ah - got it. Thanks! I was actually thinking of something that would
> also wet down the rockers and the push rods (Perkins engines are
> notoriously slow at getting oil up to the head, especially after they've
> been sitting awhile), so anything I install would also need a small hose
> teed off to the valve cover.
>
> Norm - For the pre-start lube oil feed on my genset I purchased a device
> called a "pancake adapter" that goes between the engine and the oil filter.
My rebuilt Perkins [1] 4-108 came with a pancake adapter, but I had to
take it off: the woodwork around the engine prevented its use, and would
have taken major surgery to adapt. Not an option for me. I could easily
tee off the oil pressure sensor, though.
[1] Don't ever, *ever* buy an engine from Foley. Just don't. If they're
the last engine rebuilder left on Earth, learn to use oars. If you need
an engine to save your life, die. It'll be less painful overall.
> The rocker arms on my engines are lubricated via oil passages which would
> have oil pressure fed to them via the pre-start lube oil pump. I imagine
> most engines work this way.
Good point. I guess I was going by my recollection of the "piddle
valves" in the Chevy 350s from my racing days - they didn't let any oil
through to the rockers unless the lifters were actually moving. The
Perkins is probably a much simpler beast.
> The concept of "crud" in the lube oil system of an engine may be out of
> place. When I removed my main engine oil pan to make the oil suction point
> for the pre-start lube oil pump suction I was surprised to find the inside
> of the pan was spotless - no crud or residue whatsoever. When I pulled the
> heads to get a valve job the tops of the heads (where the valve gear is) was
> likewise spotless.
Interesting! I've seen quite a bit of crud come out of engines - but a)
they were gas engines, and b) it was probably the first time they'd ever
been cleaned internally in many years of service. I was part of a group
of engineers and techs at Hughes who were into racing, and we did most
of our wrenching together - including flushing out whatever engines we
managed to get from a junkyard. We'd drain the oil, fill the case with
diesel, and crank for about 30 seconds without starting... what came out
was pretty nasty looking. Sometimes, we needed to flush an engine twice.
> I was on a ship one time where the Chief Engineer (whether he knew it or
> not) was running what appeared to be a Ponzi scheme selling shares of a
> company that made and sold pump/filter machines to flush out the oil
> circuits of car and truck engines. I have never heard of this being done
> and have read that modern high detergent lube oils and filters keep the
> engine clean.
I recall Delo 400 being *the* hot ticket to keeping your engine clean
back then. That was the first time I ever heard of a high detergent
oil...
Ben
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