Thread: oil level risen
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Old 10-18-2016, 06:29 PM   #15
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Common in engines with injector pumps is for the seal to fail between the pump and gear. Since the pump runs at very high pressure, fuel goes into the gear case and into the sump.
Don't run the engine under load until you determine the makeup of the oil.
While the lift pump diaphragm could allow fuel into the sump, I've never seen it. Most pumps have a vent so the fuel escape is on the outside and noticeable. a holdover from gas engines.
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