[Chrysler300] 300 F- Mysterious Oil Pump Loses Prime

["mark love marklove@xxxxxx [Chrysler300]" <Chrysler300-noreply@xxxxxxxxxxxxxxx>]

Had a unique issue and would appreciate any comments that might keep it from happening again.  Drove my 300F for 10 days or so in October and put it away in the garage.  Just connected the battery.  Was running 50/50 91 non lead and /110 lead fuel.  Car recently tuned and running beautifully.  Came back to the garage and she fired up with some gently pedal work, but got noisy fast on the top of the motor.  Looked down and no oil pressure.  Turned it off.  Waited,  Turned it over.  Same result.  Turned it off.  Took off the oil pump and everything looked fine (motor rebuilt by George Riel in ’04 but only 7,000 mi ago, engine oil is fresh and looks clear, changed in 5/18, is 10-30 conventional with ZDDP at 1600 ppm).  Re-oiled the internals and put it back in.  Started her up and presto, all is well.  Would anyone opine on how the pump lost its prime, which is the only conclusion I could come to?  Any ideas on how to keep it from happening again as the car will sit after this week for 5 months over the winter?
Mark.   

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Posted by: mark love <marklove@xxxxxx>
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