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Re: [GMCnet] Oil galley plug [message #237242 is a reply to message #237239] Fri, 24 January 2014 00:13 Go to previous messageGo to previous message
WildBill   Canada
Messages: 232
Registered: January 2014
Karma:
Senior Member
James Hupy wrote on Thu, 23 January 2014 22:33

Bill, Yes Olds did. The problem that Joe dealt with was one of our own
creation. When the Olds is fitted with a high volume oil pump, certain high
rpm operations will deplete the supply of oil in the STOCK OIL PAN. That
led to restrictors in the oil galleries as an attempt to reduce the flow
rate and as a secondary benefit?, an increase in pressure. Jury is still
out on that as a benefit. It is kind of a yes-but deal. I question the
value in a motor home application. Absolutely bone stock 455 and 403 Olds,
in heavy vehicle operation, with proper oil change intervals and tune ups,
easily last well over 100,000 miles. A lot longer in lighter vehicles. Do
we really NEED high volume oil pumps? I lean towards the not really, but,
group of opinions. But, gee let's re gear this sucker, put some headers on
it, stack on different intakes and camshafts, add on fuel injection, etc.
and the equation changes quite a bit. You rev these suckers up (like Joe
Mondello) or you and me in, for example, a jet boat or street rod? Any
weak spots in an engine design will quickly surface. Then we have a
tendency to attempt to "bullet proof" an engine so it will live in
circumstances of our own creation. That is some of what Joe did. Your
opinions might vary.
Jim Hupy

No, I agree with you. When I'm building an engine that I have not had experience with I probably spend more hours researching than building. Same thing I believe quite often a high volume oil pump on a new engine is unnecessary. I like oil at my mains, I like a decent amount of oil flowing over my valve springs and stems for cooling. The factory engine didn't seem to have a problem till the guys wound them to 6000 rpm when there was no more oil in the pan and they figured out that to much oil was pumped up top and drain back to the pan wasn't good enough. That tells me a stock engine should have enough oil slopping down to lube a distributor drive gear. I guess I'll find out, I'll be pulling the intake at least to plug the crossover. Like I say over the last 35 years I don't remember seeing that many olds, remember one that was a total sludge machine but I don't think he changed the oil for 70000 miles, lifters were mushroomed, cam ok.... Last 25 has been doing airline ground equipment so like I say not many olds.
Salem, Or
78 GMC Royale 403
On Jan 23, 2014 8:02 PM, "Bill Dolinsky" <Wildbillnick@yahoo.com> wrote:

>
>
> So did olds deliver engines from the factory with the drilled plugs? My
> impression was they pumped to much oil to the top at high rpms and emptied
> the oil pan so he restricted oil to the top. I have read his articles and
> while I agree with limiting oil to the top taking more away from the mains
> with a controlled leak for a distributor gear and timing chain, we'll if
> I'd did that I would want the restrictors in the main journals. But then
> never ran an olds, nothing but bbc and sbc and import na and turbo. Oh
> yeah, dodge and fords too. Just no experience Buick, olds, caddy except for
> repair.
> --
> Bill Dolinsky
> Edmonton, Alberta, Canada
> 1977 Kingsley TZE167V102169
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