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Old 11-08-2018, 09:51 PM
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Diesel911 Diesel911 is offline
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Location: Long Beach,CA
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Look at the front of the Fuel Injection Pump behind the splined gear and you will see an opening and that is where the oil drains out of the Fuel Injection Pump. See the yellow outline in the picture.

See if the splined gear on the old Fuel Injection Pump has an O-ring on it and do the same with the newer Fuel Injection Pump.

It is hard to see in the pic but is shows an Oil Outlet and an Oil Inlet on the ones that have the O-ring. I have not ever seen one of those.

Can't help more till we know what you have. Hopefully both fuel injection pumps have no O-ring on them.
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OM616 Injection pump oiling...?-fuel-injection-pump-gear-end-2018.jpg  
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