12HT sprung a leak on the back of the injector pump can't find part number

[BigHighBlue]

Howdy Gents-pretty much what the title says. I noticed some wetness around the back of the injection pump and on the oil filter housing. I found the diagram on Partsouq but there doesn't appear to be a part to replace. Maybe I just need to snug up the bolts? To be fair I'm scared to disassemble since I'm heading to Colorado in a few weeks. I circled where the leak is originating Any suggestions?

 

[relaxedcruiser]

Wow - nobody answered since jun 20 ?
You surely have it sorted by now....

But for the other onlookers - that is the the boost compensator housing - the diapragm inside is most likely causing the oil leak. The rubber has dried and shrunkl and does not seal anymore. (engine oil mist on inside)
Toyota only sold the complete compensator housing, hence no part# for that diaphragm.
I got a direct replacement from a diesel injection shop.

 

[BigHighBlue]

Wow - nobody answered since jun 20 ?
You surely have it sorted by now....

But for the other onlookers - that is the the boost compensator housing - the diapragm inside is most likely causing the oil leak. The rubber has dried and shrunkl and does not seal anymore. (engine oil mist on inside)
Toyota only sold the complete compensator housing, hence no part# for that diaphragm.
I got a direct replacement from a diesel injection shop.

Thanks for the reply! No, I haven’t fixed it yet just been ignoring it . When you say direct replacement do you mean the diaphragm?