O-rings and oil pan gasket

parkerm

I am reinstalling the dipper tray and oil pan on my 1940 Splasher engine. I ordered the gaskets from Olson's and along with the gaskets came a small O-ring. When I removed the pan and dipper tray I did not see an O-ring or the remnants of an O-ring. There is no mention of this in my mechanical procedures manual.
I am guessing that the O-ring goes around the copper oil tube that runs from the pan to the engine. My question, is where does the O-ring go? On the pan to block side or between the pan and the dipper tray?

All help appreciated.

Regards

Marvin

Park_W

Slide it on to the tube after you've set the upper pan in place.

parkerm

Thank you Park I appreciate the information.

Marvin