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Mark,
I
suspect that you are right about that. I'm going to replumb the header
tank, and pull it out of the top of the thermostat housing by itself.
Steve
Steve,
If you'll accept a
comment from someone who isn't flying (yet), I would like to make a
suggestion. My 3-rotor had the same symptoms (gurgling in the purge
tank) upon shutdown. My problem turned out to be a radiator supply line
too close to the exhaust. It was fine as long as the coolant was
circulating. As soon as I shut it down, the coolant would reach boiling
point and it would spit and gurgle for about 5 minutes. I would be
suspicious of the coolant lines to your turbo.
Mark S.
Subject: [FlyRotary] Still high
temperature
I would
appreciate input to a problem that I have. I just overhauled
the
engine, and reworked the
cooling system. I'm now using the A/C evaporator
cores for radiators. The problem I'm
having is, that when I take it up, I'm
seeing coolant and oil temperature of about
210 degrees. That is climbing
to pattern, leveling off, and throttling back to low power. The
oil stays
pretty much where
it is, and the coolant come down just a couple of degrees.
When throttle back to land, the coolant and
oil both come down to about 180
at touchdown. I taxi back to the hanger and shut down with oil
and coolant
about 190-195,
but after shut down, I get all sorts of gurgling noises from
the header tank, which is fed by the tap on
the side of the thermostat
housing. The gurgling noises go on for 5-6 minutes, which would
seem like
the engine is
overheated, but while hot, it doesn't seem overly hot. The
other end of the header tank feeds coolant to
the turbo, so maybe the hot
water is coming from it ? Maybe my header tank should be fed
differently ?
Also at this
time, after a short flight, there is only a couple of cups
of
additional coolant in the
overflow tank.
I assume that
the higher than desired coolant temperature, and the
gurgling
noise are
related. I pulled the water pump off today to double check
it,
and all seems OK.
The pump only has about 10 hours on it. When I run it
on
the ground, and feel the
radiators after shutdown, they are uniformly hot.
I put a furnace blower pointed at the scoop,
and I'm getting very even
airflow through the radiators. The oil cooler, on the other
hand, has about
75% of the
air going through the middle of the cooler, so I'm going to
have
to add some deflectors
in the plenum to push more air to the outside. That
seems to be a less significant issue at the
present.
Any thoughts
?
Steve Brooks
Cozy MKIV
Turbo rotary
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