Re: [Amc-list] 195.6OHV "full flow" oil -- to the head

[Frank Swygert <farna@xxxxxxx>]

The only thing to consider is the rate oil drains back from the head. The oil pump could put more in the head than will drain back at a sufficient rate, which would reduce the amount in the pan (all AMCs have that problem already -- at least the push rod oiled sixes and V-8s do) and could cause leaking if the level rises to the edge of the valve cover. That seal isn't made to be immersed in oil, neither is the oil pan gasket, both keep splash and mist in only. I would think hot oil would drain back fast enough, but depends on how fast it's pumped up. I wouldn't think that single line could pump as much up to the head as 12 hollow pushrods would though. 

In the original design half the oil was being dumped right back into the pan. Hmmm... leave the T in, just run the through line to the other side of the pan rail with no filter in between. But then I wonder if too much will flow through and not enough to the rockers -- the filter creates a bit of restriction. 

-----------------
Date: Sat, 18 Oct 2008 13:09:03 -0700
From: Tom Jennings <tomj@xxxxxxx>

Frank Swygert wrote:

> > You're forgetting that in 63 AMC did just that! They controlled oil
> > flow to the head through the first cam bearing, and ran a line from
> > the main galley straight to the filter. Apparently the T controlled
> > flow to the head somewhat. The way the T is in the head there should
> > be roughly a 50/50 split in oil delivery, assuming a good flow
> > through the filter. As You noted, once the filter is clogged, or
> > rather once it gets dirty enough to affect flow (50% clogged?) more
> > oil would go to the head.
>   

Yeah, the volume would go way up! In THIS motor, what is the downside to 
that I wonder? The rockers can't care. Might even help cooling. It's not 
like it's stealing oil from anywhere; it'll be the same amount of oil 
out of the pump up that skinny line.

So what ARE the downsides to too much oil in the head? 

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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