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

[Wrambler242@xxxxxxxxxxx]

Two things of big concern when over oiling the top end.
One is flooding the valve seals and creating a smoker.
Two is pumping the oil all to the top end, bad for the bearings!

On all 4.0L's I build, uh, one in this case :]
I Polish the snot out of the oil drain backs in the head. I mean really polish!
Round the edges open the holes, even create a little better gully!
One thing 4.0L's will do is build oil and cake the heads, then the oil lays on the head and caes up even more!

Still waiting on those pistons! [rubs hands together and drools on keyboard]

I'm ready to start screaming, D#&ned shoulder...
I got about a third of what I wanted to get down today! But at least I got something done!
Worked on some other stuff in prep for my cable upgrades and was in the area of where the 4.0L block and 258 crank are resting. Let them rest up, there going to get some abuse!

On the interesting note, My oldest son is so far nailing really good grades in his first semester of Engineering!
YAY!  He also has a VERY intense want for an Eagle Talon TSI !!! Which as we know is really a mitsu, but at least it has that last vestige of AMC heritage to it!  I've got him to consider it or a Grand Cherokee with a 4.0L in it. So, Some hope fer the boy yet!

--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrac II
" I realize that death is inevitable.
I just don't want to be around when it happens! "

 -------------- Original message ----------------------
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.
> 
> It could be that it's not so much bad for the engine, as bad for AMC, 
> service-wise (leaky valve covers, plugged filter dries up the valve 
> train, etc). More than "enough" oil is a waste and tempting service fate(s).
> 
> ? Too much oil to the valve train
> ? double the oil filtration rate
> 
> So what ARE the downsides to too much oil in the head? I've read Smokey 
> Yunick's thoughts on this, but the circumstances here are totally 
> different -- 3500 rpm is as fast as this motor's spun in a year, except 
> once when I missed a shift and it went near 4000 (scary).
> 
> 
> 
>  > The front cam bearing journal on a 63+ has a groove or
> > flat in it (don't recall which) that only allows oil to pass through
> > when that specific area uncovers a hole in the side of the block. An
> > earlier block can possibly be made to work with the later cam --
> > simply drill through the side into the front cam bearing cavity at
> > the appropriate position (check a cam for that!) then tap it for a
> > line. 
> 
> I will have to be very careful with this in my '59 motor. I have a '63 
> head sitting on it (in the shop). I may be bugging you when the time 
> comes!!!
> 
> (I still wanna get the motor on the stand today. It's still on it's 
> shipping pallet.)
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