RE: Europa-List: Water pump removal «Â-inaircra

[Bud Yerly <budyerly@msn.com>]

John,

It is a laundry list of checks I=92m afraid:

  1.  If you are seeing coolant on the duct it may be from
     *   The lowest bolt, the stainless one in the Rotax Maintenance Manual
, on the water pump has to be properly inserted and sealed.  If not there w
ill be a tell tale drip.
     *   Coolant hoses can leak as corrosion around the soft aluminum nippl
e will push the hose, and then under pressure may flake off and leave a sli
ght seep.
     *   The gasket on the water pump itself may be leaking.
     *   Of course it can be the swivel on the 1 inch housing on the pump o
r the 1 inch hose.
  2.  The Water Pump is very difficult to service with the engine on.  That
 is why I make my engines so easy to remove.
  3.  You may also find you are having localized boiling if your CHT is run
ning above 245F.  The localize boiling will cause the cap (check your cap p
ressure release also) to vent into the tank, then it goes overboard.


All I can say is continue to look.


Best Regards,

Bud Yerly


Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Window
s 10


________________________________
From: owner-europa-list-server@matronics.com <owner-europa-list-server@matr
onics.com> on behalf of JohnFrance <77alembert@gmail.com>
Sent: Sunday, August 5, 2018 12:30:44 PM
Subject: Europa-List: Water pump removal =C2=AB=C2 inaircraft=C2 =C2=BB XS


Hello,
I have an intermittent coolant leak on my classic which has a XS firewall  
forward package.
Is it possible to remove the water pump from the engine while it is in situ
 on the aircraft?
 In spite of doing pressure tests, running the aircraft with the cowlings o
ff I have been on the unable to trace the origin of the leak, it does not l
eak cold with a pressure of 1,4 bars.
On some flights there is no discernible leak, on others I have lost up to 1
50 ml during a two hour flight.
There is a bit of a white deposit on the exhaust heat shield underneath the
 water pump. I have also found liquid on the aluminium plate above the radi
ators but the air passage through the radiators has always been dry.

I would rather be sure of where the leak is coming from prior to taking any
thing apart. Does anyone have some experience or knowledge they could share
 with me?

Regards,
John

--------
Europa mono Nr 192


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