Oil Cooler Upside Down

G'day Everyone,
I've nearly finished catching up on all the maintenance on my newly aquired MkIV 1050. I've done the 5 year rubber replacement but as yet haven't started it since. I have oil pressure and it's circulating back to the tank but I'm paranoid that the cooler is just full of air that's gonna get sucked into the system when it's running. There is no way to fill it with oil then mount it because the hoses and fittings need to be removed to mount it. Has anyone else have there's mounted like this ? The aircraft has nearly 400hrs on it and has been through Rotax approved maintenance organization in the past and it hasn't been changed. What's the deal, should I be worried ?
Just zoomed in on another picture I had at had.
https://photos.google.com/photo/AF1Q...t_eJjRqQr3WoBA
https://photos.app.goo.gl/FANrQxe64zqVroYF9
https://photos.app.goo.gl/6kfHk3QGi565kbVg9
https://photos.app.goo.gl/6kfHk3QGi565kbVg9
https://photos.app.goo.gl/6kfHk3QGi565kbVg9

Any comments on upside down oil cooler?

What kind of engine are we talking about?

Rotax 912 UL

OK, I have a 912iS but I believe all of us, at initial install, have an empty oil cooler. I just did my first oil fill per the manual. I would refer to the manual on method of filling and purging the oil system. On mine it as simple as disconnecting the oil return line from the tank. Plug the tank and put a 5psi pressure into the drain line after capping the tank. Pull the prop through (60 times for me) and oil pours out the return line into a bucket.

How is your cooler mounted? Can you mount it upside down?

I suppose where there's a will there's a way. Our 7SS has a right side up cooler. I would think that given the fact that I have flexible oil lines to and from the cooler, you could have the cooler hang right side up, purge and fill it, then flip the unit upside down and install the hardware. Maybe I'm over simplifying things.

Sandgroper,


Everything I have heard, as well as logic related to fluid flow would indicate the fittings should be pointed up. When purging/venting - air goes up. Fittings down has some chance of holding air in the cooler, to become dislodged later.