ZD30 Engine Oil Leak from Injector Pump??

[gregsautocare]

Hi Guys,

I recently have done an engine swap on a 1999 ZD30 Patrol. Customer supplied there own second-hand engine, which included the injection pump, so I was happy I didn't have to change over the pump as its a 7.5 hour job and the whole front of the engine has to come off (so I have been told)! After hours and hours of hard work I finally fired it up and it runs really well. Only problem is I have noticed an oil leak coming from the drivers engine mount which I think is coming from the injection pump. I have added some photos that shows the leak (sorry for some reason it has turned the last 2 pics 90 degrees). You can see how it trails down the side of the block and then down the front right of the drivers engine mount. Just wondering if anyone else has had this problem and what was the cause of the leak? I'm thinking there's and o-ring or seal that seals the injection pump to the block? I really don't want to have to pull the whole pump off so any ideas would be greatly appreciated :-)

Regards Greg