Anderson Ed wrote:

Jon, some good points.  I need to recheck the apex seals and make
certain the bevel I believed I noticed is really there.  I intend to go
out tonight and recheck that as well as re-measure the width of the rear
rotor housing to see if any "shrinkage" has occured.

You and Paul may well be right about impeded oil flow keeping the rotors
hotter than the norm.  My oil level in the pan is now definetly below
the eccentric shaft and also below the lower level of the rotor oil
exit  area, but it still covers the exit for the oil to drain from the
central housing to the oil pan.  I did not believe that the oil would
"Stack" up in the housing due to the housing oil exit being below the
pan oil level, but clearly that could be happening.

As several have recommended, including Paul L. I should drop the bottom
of the oil pan several inches and extend the oil pick up tube and that
would remove the possiblity of impeded oil flow from the rotors.

If the apex seals are beveled as I think, I attribute that mainly to
the fact I was initially using a much "leaner" oil mix in my gasoline.
I mis-understood a recommended mixture ratio which was intended as the
ratio for oil in the gasoline to "supplement" the oil meter system for
high performance turbo engines rather than the ratio needed when the
metering system is removed. Interestingly enough the side seals and oil
"O" ring retainers do not seem to have suffered as much from the lean
oil mixture as they measure near new parts specs.  But, I will re-examine
the apex seals.

The main evidence I have for the rear rotor being hotter is the amount
and degree to which the carbon deposits were baked on the rotor
compared to the front rotor. Also, I notice that the apex seals on the
rear rotor did not seem to slide up and down as easily as they did on
the front rotor and there seem to be more carbon near the apex seal slot
on that rotor.

[Part of the scenerio for apex seal flatting.]

I appreciate Jon's comment about perhaps the rotors retaining too much
oil contributing to my high oil and rotor temps.  Because, I am
considering replacing the normal oil metering jets in the eccentric
shaft with the mod using weber carburator jets to get MORE oil flow.
Now, I need to scratch my head on that one some more.

Sigh! and I thought tearing down the engine and deciding what to change
would be easy{:>}.

Ed Anderson

Don't be too quick to put it back together Ed. Take a jewlers loop
with you to examine those apex seals and other tiny parts.

Paul

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