Pressure oil

Thanks for your response Jim. I prefer to consult with you and better if possible with a Rotax IRMT. The question is who can I contact who is IRMT from Rotaxowener and if that falls within what is paid for the subscription or does not fall within the subscription. I'm a little clumsy when it comes to technology.

Alejandro, understood. Let’s start with the basics on your oil fill problem.  
1. can you confirm the end of your oil tank vent hose is not exposed to ram air (the slipstream)? This could pull oil from your tank until the level decreases. Your tank vent hose end must be protected from ram air- keep it within the cowling. It also must be routed so as to be in a continuous decline.

2. when you fill your oil tank, do you first burp the engine then fill the tank? 

3. did you install new oil hoses when you installed his new engine? 

4. Do you have an oil thermostat installed?
5. Are you reaching oil temp of at least 120 degrees centigrade every flight?

Thanks Jim.

1.- the oil breather hose is sticking out of the belly of my Tecnam P92. I will proceed to make a cut inside the engine compartment so that there is no negative pressure.
2.  I always check the oil level after flying, with the oil hot, and I check the level after it gurgles.
3. I don't have an oil thermostat installed.
4. My oil temperature is normal, not 90 or 100 degrees Celsius.
I have consulted with Michel from Rotaxowner if within the subscription it is possible to make consultations with an IRMT, I have learned that for now not, only what is contributed in the Forum, but that for next year it may be possible to do it with the subscription

Hi Jim,

"4. Do you have an oil thermostat installed?
5. Are you reaching oil temp of at least 120 degrees centigrade every flight?"

In Q4 are you just asking a question ? or are you suggesting a thermostat should be fitted ?

In Q5 - I stand to be corrected however I am unaware of  Rotax recommendation for the crankcase oil to reach 120C or for this to occur during every flight.

I am aware that Rotax (along with many other engine malkers) recommends that the crankcase oil should exceed 100C for a sustained period, at least once in a days flying (not every flight). The purpose of the elevated temperature, is to drive off volatile contaminants eg traces of unburnt fuel, water vapour and byproducts of combustion. 

Alejandro

You can make a bypass notch in the oil vent line just before it exits the cowling.  This protects the hose from condensation freezing and plugging the vent, and also eliminates any negative pressure that may pull oil from the tank.  See the attached page from the installation manual.