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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 01-26-2014, 07:20 PM   #1
5overt
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Default oil pressure

no oil pressure. gauge reads zero pulled valve cover started it up no oil squirting thru push rods. motor sounds dry. oil pump for sure or something else before i jerk motor out to put in oil pump
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Old 01-26-2014, 08:15 PM   #2
rmodel65
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probably the oil pump driveshaft sheared its pretty common on the 289/302/351w motors
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Old 01-26-2014, 08:59 PM   #3
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well I tried to spin it with a drill seems to be locked up. is that shaft supposed to be a spiral or hexagon?
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Old 01-26-2014, 09:54 PM   #4
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It should be hexagon. If it's spiral, something has locked the pump up - I had one do the same thing a few years back. You don't have to pull the engine to pull the pan and replace the pump and/or pump shaft; though it's a lot messier to do in the car....
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Old 01-26-2014, 09:56 PM   #5
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well I was going to do rear main fron etc tranny needy work this just made evrything else a priority as well
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Old 01-27-2014, 04:28 AM   #6
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Quote:
Originally Posted by 5overt View Post
well I tried to spin it with a drill seems to be locked up.
its not locked up. if it was the shaft would be broken or twisted like a pretzel etc. its a 1/4 inch 6 point.
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Old 01-27-2014, 04:48 PM   #7
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I am a blacksmith and the rod is twisted like that of decorative iron on burglar bars. no longer the once stock hexagon shape......the drill would not budge the pump
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Old 01-27-2014, 07:03 PM   #8
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Once upon a time, my oil pump drive shaft was as you describe, except with extra twist compared to twisted decorative wrought iron.
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Old 01-27-2014, 08:12 PM   #9
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the term changes from twisted to SPUN!
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Old 01-27-2014, 11:20 PM   #10
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Quote:
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its not locked up.
it's locked up, nuff said..........................op make sure there is not a lot of metallic in the oil, may want to cut open filter as well to see if bearing material is in it ...if none seen, change the pump and hopefully you dodged a bullet
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Old 01-27-2014, 11:20 PM
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