Need help with radiator hose issue.....

[CrazyOneToo]

Hello Z4 fans, Today I was changing my OFH gasket on my 2007 3.0 Si but when I removed the radiator hose off of the OFH unit an Oring and
a small plastic ring came out and I did not see how they came out.
Any chance anyone knows how they go back in?

The pic below with the yellow highlight shows where I'm talking about.
The Oring seems almost to big to fit inside the hose connector but there was no leak before removal.

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[Jpluttrell]

Is this the Coolant hose that is held into the engine block by 2 10mm bolts? I had the same issue on the hose on the N52 that you move out of the way to get access to the bottom bolt of the OFH?

 

[CrazyOneToo]

Is this the Coolant hose that is held into the engine block by 2 10mm bolts? I had the same issue on the hose on the N52 that you move out of the way to get access to the bottom bolt of the OFH?

No I didnt take that hose off. Just seemed easier to loosen the other two bolts and hold the OFH away from the engine some so I could remove the bottom bolt. This is the hose that hooks to the radiator/expansion tank and the OFH. It was a pain getting the hose off and I should have just left it on and cleaned what I could but it was so nasty from the leak. Not actually sure if it was the OFHG or the oil cooler gasket leaking. Ugh!