While showing off the pport today, I saw coolant dripping out of the end
of the slide throttle.

"No $#@$% Way!" Says I.

20 minutes later, the throttle body has been pulled, and there stands
coolant in the intake manifold - mostly in rotor2, a bit in rotor1.

2 hours later, the engine is sitting on the floor.  I connect the water
pump intake & output to itself.  I put a schrader valve in the vent
bung.  I bring the engine up to 20psi.  I stick my ear next the the #2
rotor intake port & listen to the sound of pressure whistling through
some sort of crack.  I listen to rotor 2 exhaust port & hear silence.  I
listen to the #1 rotor & hear silence.

So.

The rebuild has accomplished nothing.  I still have a water jacket
failure in the #1 rotor chamber.  Less to be sure -- coolant is not
gushing.  In fact I couldn't see evidence of coolant in the rotor
chamber itself (last time it was painfully obvious that the rotor was
swimming in coolant) and never got any to appear in the exhaust port,
nor in the plug hole.  Its like the coolant magically appears in the
intake manifold for rotor 2.  But it does correspond with the loss of
aprox 2 shot glasses of coolant over night.  I had thought I was simply
still purging air from nooks & crannies.  It is clear now that this was
coolant leaking via #2 rotor.

Mark Supinski

Which rotor housing is rotor number 2. The rotor I re potted
or the other one?

Does it depend on rotor position? Repeat the test with the e-shaft
in four positions.

Find a stick or a piece of welding rod four inches long.
Put a small short ribbon on the end. With the slide throttle off
and the engine pressurized place the stick in each intake
port in turn with the rotor as far away as possible. Is the
ribbon moving around when it gets near the wear surface?
The object here is to see if it is leaking around the end
of the intake tube.

Another way is use a small remote micro phone and connect it
to a recorder with a Vu meter.

If you don't mind I'll come over on Tuesday early morning
if that is convenient. This could be an O ring problem.

Paul Lamar ...No rotor no motor.

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