In case anyone else needs to do this, I thought I’d expand on the explanation of how.
I used ENGINE OVERHAUL, ASSEMBLY AND PARTS BOOK FOR JABIRU GENERATION 4 2200 AND 3300 AIRCRAFT ENGINES
DOCUMENT No. JEM0004-6 Dated – 30/05/2020 (thanks Steve!)
Found here -
https://jabiru.net.au/service/manuals/There are multiple variations of the pump and plates now. The pump has a four lobe version and a six lobe version. My generation 4 engine has a six lobe pump but the back plate does not have the groove and gasket that the latest version apparently has.
I had purchased Loctite 515 and 7649 primer as John mentioned. (It appears Loctite 518 is a suitable replacement) I found removing the prop was the easiest method to get the pump off. Pulled the 4 cap screws and worked the cover off, then carefully removed the oil pump inner and outer gears off. John is quite accurate in his description that the woodruff key is an escape artist. I then worked the pump back plate off.
All of this took less than 30 minutes.
I thoroughly cleaned everything, dried it and removed any residual sealant. Cleaned it again, dried it again, then applied the Loctite primer all over the faces. I put oil on the gears and in the cover per the manual.
Getting the woodruff key and inner gear back on was a bit trying, but I just took my time and it worked.
I smeared a layer of Loctite 515 on and then carefully reassembled things. One important note is the need to only tighten the cap screws finger tight at first, then put the prop back on and rotate it a few turns to ensure the gears and housing are not bound up. Then it’s safe to tighten and torque the cap screws.
After a test flight today, no more seepage. I hope it stays that way.