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Oil thermostat - function

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sidsel.svein(at)oslo.onli
Guest

Posted: Fri Oct 30, 2009 2:25 pm Post subject: Oil thermostat - function

Steve,

  

 Sorry - I forgot to address  the other part of your question, how the oil thermostat  works:

  

  

The Perma-Cool thermostat will allow most of the oil to  flow directly to the engine and bypass the oil cooler when cold.  Some flow  is still maintained through the oil cooler at all times to avoid super cooling  of the oil in the cooler.  Once the oil warms up, the thermostat will allow  the oil to flow through the cooler and maintain a constant temperature of  approximately 200oF. 

During climb-out, the oil  heats up to above 212 degr F /100 degr C in my case.  Remember, the  thermostat prevents too much cooling but it does not add  cooling! 

Regards, 

Svein

   [quote][b]

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rparigor(at)suffolk.lib.n
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Posted: Fri Oct 30, 2009 3:59 pm Post subject: Oil thermostat - function

I am not flying with my 914 yet, but have a Mocal oil thermostat that appears to work similar to the one sold by Rotax. 



The waymine works is the oil cooler is always plumbed in the cooling loop. There is a bypass valve in the thermostat where it is an easier path for oil to flow through the bypass valve than through the oil cooler itself. Mocal said it is very hard to predict just how much will flow through the oil cooler with bypass opened will flow, depends much on install and components used. Think remember something like 5 or 10% may be what may flow always through oil cooler in my install as his best guess.

Anyway if bypass failed closed, 100% of flow would be routed through oil cooler with no oil flow restriction.

If bypass failed opened, there would be no oil flow restriction but you would only get 5 or 10% cooling.

I think the unit I have is 180F?? They have another unit that if it failed it could restrict oil flow. I am not sure if Rotax unit could cause oil flow restriction if it failed.

I purchased mine from Mocal dealer in Florida.

BTW they exchanged my oil radiator that was unused for one with AN fittings instead of wierd ones on my Europa supplied Mocal oil cooler.



Ron Parigoris

Visit -  www.EuropaOwners.org

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steven.pitt2(at)ntlworld.
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Posted: Sat Oct 31, 2009 2:25 am Post subject: Oil thermostat - function

Thanks Svein - both emails were exactly what I was  looking for.

 Steve

 [quote]   ---

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