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Author
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Topic: How long can an engine run without oil !!!!
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Pierre
Journeyman Posts: 61
From: France
Registered: Apr 2002
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posted 05-16-2002 07:09 AM
   
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
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posted 05-16-2002 09:26 AM
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.------------------
67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Aluminum Heads, Edelbrock TorkerII, Carter 750 CFM, Comp. Cam 477/510 219/[email protected], Performance Automatic C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.
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V8 Thumper
Gearhead Posts: 1090
From: Orange, Ca. United States of America
Registered: Dec 2001
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posted 05-16-2002 11:36 AM
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
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posted 05-16-2002 01:04 PM
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
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posted 05-16-2002 01:30 PM
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
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posted 05-16-2002 10:58 PM
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
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posted 05-17-2002 04:49 AM
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
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posted 06-02-2002 02:11 AM
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
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posted 06-02-2002 03:11 PM
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
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posted 06-02-2002 10:19 PM
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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