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Old 08-24-2006, 11:47 AM
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Unhappy How long can an engine run with no oil pressure?

I went out and started my car this morning, then went back into the house to grab a couple things. I returned after two or three minutes and hopped in the car to see an oil gauge registering NOTHING at all. I shut the engine off, and took the bus. No time to mess around with shit this morning, I was late already.

There was no warning light on the dash, which on other cars is supposed to be on a seperate circuit from the gauge. And there should be a low oil cutoff to the ECM too right? I've had this car for about a month now, so am not very familiar with it.

Obviously one of two things has happened. Either the gauge was not reading properly, or the engine had actually lost pressure for some reason. I had time to check the dipstick before I left - nice clean oil sitting just below the full mark.
I wouldn't be surprised if it was just the gauge / sender / wiring.

Now for the important part. Would the engine have lasted for a full two minutes with no oil circulation, or would it have seized for SURE? Somebody please tell me that I did not just put 200K miles of wear on my engine without quite killing it!
  #2  
Old 08-24-2006, 12:15 PM
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i have drove over 30 miles with absolutly NO oil in the engine (cracked pan) and apon tear down i found NO DAMAGE, but then agian i use royal purple and lucas oil stabilizer so it could have left enough residue to help. i would not suggest doing this to anyone. but my engine DID survive.
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Old 08-24-2006, 02:01 PM
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Well damn. I was hoping to rule out that possibility.
I guess it could have running without oil after all
  #4  
Old 08-24-2006, 02:51 PM
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Depending on the year of the ecu whether or not you have engine cut for low oil pressure
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  #5  
Old 08-24-2006, 07:08 PM
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not very long i think its time for the old tow truck
  #6  
Old 08-24-2006, 07:10 PM
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sum guy with a Quad
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buuut check into the wiring
  #7  
Old 08-24-2006, 09:46 PM
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i think there's a possibility you would be ok if it was just idling... possibility... i've ran engines with no oil in the crankcase before... but it was only for a few seconds. no damage. don't know about 2 full minutes.
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  #8  
Old 08-24-2006, 11:56 PM
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i drove my old car (buick 3.8L) across town (babying it) with no oil press due to a bad pump, and upon teardown it was fine. you will probably be fine, expecially if it was just idling. the first thing i would check is the voltage at the press sending unit.
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  #9  
Old 09-02-2006, 07:29 PM
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*Update*
Engine has good oil pressure, the locking tab on one of the connectors was broken, so it was just a loose connection.
  #10  
Old 10-01-2006, 12:44 AM
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Hey, how about 15mins on a fresh start up we did, my son transfered everything over from a dry sump system, but never pulled the bypass plug, almost a terrilble mistake, pulled pan back down pulled threaded plug. oil and filter and no problems.we even hit 5800 on a free rev a few times. thank god they used some kick ass oil on break in.
  #11  
Old 10-02-2006, 03:39 PM
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Jesus, that's gotta be a sick feeling
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