Posted by used red MN on November 19, 2023 at 11:59:41 from (68.46.31.28):
In Reply to: BD144 posted by wildbill447 on November 19, 2023 at 11:41:28:
I assume you mean that since the engine crankcase (oil) is over full due to dilution with fuel the engine is releasing that from the breather. One of two things or both. Does your engine have a transfer fuel pump number 18 in the link? If so it can fail and leak fuel into the crankcase. Was the injection pump rebuilt or resealed during the rebuild? If not the drive shaft seal can fail and also leak fuel into the crankcase.
Edit: Taking a second look at the diagrams if your oil cap or breather is on the valve cover and this is happening that is not good. It would tend to indicate that you are experiencing a lot of compression blow-by which would mean a problem has occurred with piston rings or severe scoring of a piston and/or cylinder wall. If this is a problem when the oil cap is removed heavy vapor pulsing will felt coming out of the crankcase. My initial reply thought the breather cap you described was on the timing gear case.
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