Today's Message Index:
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1. 05:21 AM - Re: oil thermostat installation (Thom Riddle)
2. 09:53 AM - Re: Re: oil thermostat installation (Hugh)
3. 10:37 AM - Re: oil thermostat installation (Thom Riddle)
Message 1
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| Subject: | Re: oil thermostat installation |
Hugh,
When we installed our oil thermostat, we removed the oil hoses from the cooler
end and elevated and tied off the end from the sump (tank) to keep from draining
out the oil. We turned the 90 degree fitting on the oil pump inlet up for the
same reason. The oil cooler inlet and outlet are at the top so oil loss from
the cooler was not an issue. With the new hoses connected to the oil thermostat
and oil cooler inlet and outlet, we filled the oil thermostat and hoses and
then made the final hose connections with them full. Doing it this way, we were
able to prevent introduction of excess air into the oil system which precluded
the need to purge the oil system. Our efforts paid off as we had normal oil
pressure within 3 seconds of initial startup after installation was completed.
Note that since the Perma-Cool oil thermostat never closes off the oil cooler part
of the circuit completely there need be no "air pocket" in the thermostat.
When filling it SLOWLY with the hoses attached and the ends at high points allowing
air to escape, the system should not have any air in it when making the
final connections.
If you do introduce air into the system then you should definitely purge the system
per Rotax instructions.
--------
Thom in Buffalo
N221FA Allegro 2000 912UL
N197BG FS1/447
--------------------
Finance is the art of passing money from hand to hand until it finally disappears.
- Robert W. Sarnoff
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=152311#152311
Message 2
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| Subject: | Re: oil thermostat installation |
Thom:
This term "introducing air into the system" relative to the oil system has
always bothered me. Do you not introduce air into the system every time you
change oil (i.e when you drain the oil tank and change the filter)?
Hugh
-----Original Message-----
From: owner-allegro-list-server@matronics.com
[mailto:owner-allegro-list-server@matronics.com] On Behalf Of Thom Riddle
Sent: Saturday, December 15, 2007 8:21 AM
Subject: Allegro-List: Re: oil thermostat installation
Hugh,
When we installed our oil thermostat, we removed the oil hoses from the
cooler end and elevated and tied off the end from the sump (tank) to keep
from draining out the oil. We turned the 90 degree fitting on the oil pump
inlet up for the same reason. The oil cooler inlet and outlet are at the top
so oil loss from the cooler was not an issue. With the new hoses connected
to the oil thermostat and oil cooler inlet and outlet, we filled the oil
thermostat and hoses and then made the final hose connections with them
full. Doing it this way, we were able to prevent introduction of excess air
into the oil system which precluded the need to purge the oil system. Our
efforts paid off as we had normal oil pressure within 3 seconds of initial
startup after installation was completed.
Note that since the Perma-Cool oil thermostat never closes off the oil
cooler part of the circuit completely there need be no "air pocket" in the
thermostat. When filling it SLOWLY with the hoses attached and the ends at
high points allowing air to escape, the system should not have any air in it
when making the final connections.
If you do introduce air into the system then you should definitely purge the
system per Rotax instructions.
--------
Thom in Buffalo
N221FA Allegro 2000 912UL
N197BG FS1/447
--------------------
Finance is the art of passing money from hand to hand until it finally
disappears.
- Robert W. Sarnoff
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=152311#152311
Message 3
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| Subject: | Re: oil thermostat installation |
Hugh,
Not really because draining the oil from the sump empties only that oil. The oil
that is still in the oil passageways and the cooler and hoses (and now the thermostat)
remains in place, unless you break the hose connections. That is why
after you change your oil and run the engine, you see that the oil is not perfectly
clear. Some old oil stays in the system.
It is a good idea to fill the new oil filter to just below half way when installing
it to reduce the amount of air to a minimum. Anymore than half full and a
lot will spill out when screwing it in. The air that goes in there is downstream
of the pump (so the pump does not cavitate) and it finds its way out very
quickly in the space under the valve covers after passing the rocker arms.
It is also a good idea when changing the oil to "burp" the system before draining
in order to get as much of the oil as possible into the sump before draining.
If you don't know how to "burp" the oil system, let me know and I'll explain
it. Pretty simple process which should be done before checking the oil level
too, to make sure your reading is correct.
--------
Thom in Buffalo
N221FA Allegro 2000 912UL
N197BG FS1/447
--------------------
Finance is the art of passing money from hand to hand until it finally disappears.
- Robert W. Sarnoff
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=152359#152359
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