X2 on the Fuel Supply/Lift Pump O-ring
The O-ring seals the push rod on the Fuel Supply/Lift Pump. On one side you have Fuel on the other you have the Engine Oil that lubes the Fuel Injection Pump.
I am adding a pic of the Lift Pump. It looks like if the seals at 1 and/or 2 go bad it can leak Diesel Fuel into the Oil.
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84 300D, 82 Volvo 244Gl Diesel
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