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At 10:14 PM 8/10/2004 -0700, you wrote:
Subject: [FlyRotary] Re:
Thermostat Housing
Richard,
I don't believe anyone answered your second question regarding placement
of your water temp sensor. That's very close to where I located my
coolant sensor (engine outlet). It seems to be working
fine.
In regards to plugging the thermostat bypass, keep in mind that it is
inside that cavity that you will get an airlock when filling your
system. You should provide a means of burping the air out of it or
the pump will not be able to prime and you could burn up your engine
before you figure out that you have a problem.
Mark;
I m wondering about
this. I tapped and plugged the port on my 20B when I took the
thermostat out. I have filled the engine with coolant three times;
twice on the dyno, and once on the airplane. In each case I just
filled the coolant and started the engine, and the coolant circulated
just fine.
I have a connector
hose that goes from the top of the rear housing into the pump housing
(Pic 1, small black hose behind the primary injector wires) that connects
the ports that were once used for turbo cooling.
And I have an air bleed at the top at the pump outlet hose (Pic 2).
No special air bleed out of the pump. Is your pump configuration
different, or is there something else that allows mine to work.
Al
Hi Al,
The one thing I notice is that you're running a 13B water pump housing
which is very different from the 20B housing. (see picture)
So, I would say that my configuration is different than yours. The
20B housing incorporates dual thermostats, and the outlet is higher up
next to the alternator. I think the 13B housing has a small weep
hole that allows this air pocket to fill with coolant. The 20B
doesn't have that weep hole, although it wouldn't be too hard to
add. I just figured out a different way to do the same thing by
removing the plug from the casting when filling the system for the first
time.
Mark
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