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  How long can an engine run without oil !!!!

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Author Topic:   How long can an engine run without oil !!!!
Pierre
Journeyman

Posts: 61
From: France
Registered: Apr 2002

posted 05-16-2002 07:09 AM     Click Here to See the Profile for Pierre   Click Here to Email Pierre     Edit/Delete Message   Reply w/Quote
Out of curiousity, does anyone knows how many seconds ( or minutes !!) a engine can run with a broken oil pump without irreversible damage ?
I have been debating to install one of these automatic engine shut-off switch when oil pressure drops (I have a niddle for oil pressure and sometime look at the road !!)

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Tom351
Journeyman

Posts: 93
From: Marietta,GA
Registered: Mar 2001

posted 05-16-2002 09:26 AM     Click Here to See the Profile for Tom351   Click Here to Email Tom351     Edit/Delete Message   Reply w/Quote
Hopefully if your oil pump fails, it will lock up and cause the roll pin on the distributer gear to break. This will cause the dist. to quit spinning and your engine will immediately shut down. This built in safety is more likely to work on a 351 than a 289/302 because the 351 has a larger oil pump drive shaft.I have heard of 289/302 breaking the oil pump drive shaft (instead of the roll pin) when the pump locks up, allowing the dist. to still do it's job and the engine keeps running with 0 oil pressure.

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V8 Thumper
Gearhead

Posts: 1090
From: Orange, Ca. United States of America
Registered: Dec 2001

posted 05-16-2002 11:36 AM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
I don't know (don't ever want to find out either!), but it'll run longer without oil than it will without water

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68 S-code GT
Gearhead

Posts: 456
From: Sayreville, NJ, US
Registered: Mar 2000

posted 05-16-2002 01:04 PM     Click Here to See the Profile for 68 S-code GT   Click Here to Email 68 S-code GT     Edit/Delete Message   Reply w/Quote
I had a class once back in 86. The instructor took a somewhat new Taurus wagon and drained the oil out and put a concrete block on the pedal and then we went to lunch. The car had about a half a tank in it and the engine actually stopped running when the tank was empty. The engine was hot as hell but it didn?t seize up. I really don?t know what happened to the insides or on that note why the instructor did it?

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Fastback68
Gearhead

Posts: 750
From: Sucat, Paranaque, Philippines
Registered: Jul 99

posted 05-16-2002 01:30 PM     Click Here to See the Profile for Fastback68   Click Here to Email Fastback68     Edit/Delete Message   Reply w/Quote
That's funny!!! A little bit of physics at work there, which some of the really brainy guys in M&M could explain better. I'd bet 50 cents that that engine did not want to start again after it had cooled down - or at least that it would have hurt!

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68 S-code GT
Gearhead

Posts: 456
From: Sayreville, NJ, US
Registered: Mar 2000

posted 05-16-2002 10:58 PM     Click Here to See the Profile for 68 S-code GT   Click Here to Email 68 S-code GT     Edit/Delete Message   Reply w/Quote
The car actually started the next day when gas was added to it and it didn?t run all that bad. It didn?t run all that great either but it did run. I would have thought that running that engine like that flat out would have welded itself together.

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Pierre
Journeyman

Posts: 61
From: France
Registered: Apr 2002

posted 05-17-2002 04:49 AM     Click Here to See the Profile for Pierre   Click Here to Email Pierre     Edit/Delete Message   Reply w/Quote
Thanks guys for your feedback, I guess I won't be so freaked-out abour the oil gage anymore. I am installing a high volume pump + Hardened driveshaft anyway, so I can really pay attention to the road now

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66vert
Journeyman

Posts: 2
From: Plano, TX
Registered: Jun 2002

posted 06-02-2002 02:11 AM     Click Here to See the Profile for 66vert     Edit/Delete Message   Reply w/Quote
Mine ran about 15 minutes (289) before it seized up. New motor time.

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Pierre
Journeyman

Posts: 61
From: France
Registered: Apr 2002

posted 06-02-2002 03:11 PM     Click Here to See the Profile for Pierre   Click Here to Email Pierre     Edit/Delete Message   Reply w/Quote
Sorry someone had to find out first hand the answer to my question

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Slow65Stang
Journeyman

Posts: 68
From: Reading, PA, USA
Registered: Feb 2002

posted 06-02-2002 10:19 PM     Click Here to See the Profile for Slow65Stang   Click Here to Email Slow65Stang     Edit/Delete Message   Reply w/Quote
in high school, my friend an i ran his piss beaten 78 volare 225 slant 6 wagon without oil in his yard for about 6 hours. The poor thing had 225,000 miles on it. The frame was shot to hell. It started right back up the next afternoon. Didnt sound good, but it still ran....hmmm go figure

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