---------------------------------------------------------- Allegro-List Digest Archive --- Total Messages Posted Sat 12/15/07: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 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 _____________________________________ Time: 05:21:13 AM PST US Subject: Allegro-List: Re: oil thermostat installation From: "Thom Riddle" 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 _____________________________________ Time: 09:53:05 AM PST US From: "Hugh" Subject: RE: Allegro-List: 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 _____________________________________ Time: 10:37:31 AM PST US Subject: Allegro-List: Re: oil thermostat installation From: "Thom Riddle" 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message allegro-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Allegro-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/allegro-list Browse Digests http://www.matronics.com/digest/allegro-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.