Lost oil pressure while driving, ideas?

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I love my Mopar but only being able to put 50 miles on it in 4 years really sucks :/. I can't wait for this work to pay off. Here's the other part to the oil pump shaft.
 

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Can you turn pump? If not, not an odd break at all. Seen the same thing in GM, Ford, Mopar. Always the same, something hard in the oil pump. MT
 

IMO, something got in and locked the oil pump down, snapped the end of the intermediate shaft off. A cheap investment is an ignition cutoff switch plumbed into the oil galley. Loss of oil pressure=loss of ignition signal, engine dies, done deal.

Sometimes you gotta do what you gotta do. I sure hope it works out for you. Keep us posted.
 
RustyRatRod said:
IMO, something got in and locked the oil pump down, snapped the end of the intermediate shaft off. A cheap investment is an ignition cutoff switch plumbed into the oil galley. Loss of oil pressure=loss of ignition signal, engine dies, done deal.

Sometimes you gotta do what you gotta do. I sure hope it works out for you. Keep us posted.
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Rob,

Guess break is over.

Tom
 
Yeah the pump turns just fine, I primed it for about 5 mins and it was holding 50 psi the whole time. I dropped the pan, took the pump off and cleaned/inspected it. I pulled the main caps one by one and they all look great. No signs of excessive heat damage. I also checked the # 1&2 rod bearing and they looked fine so I buttoned it back up( I know I didn't check all the rod bearings but after what I saw and the fact that the rod bearings furthest from the pump looked fine, I decided the others were most likely fine as well). It only ran, at max, 20 seconds after the pump failed. It was a late night for sure. But as always, one problem leads to another. Now I've got no spark. I appreciate the help everyone. I'm gona grab my ohmmeter and start this new headache.
 
I had Royal purple in it which comes with a lot of Zinc I believe. No additive though.
 
slimjim said:
Yeah the pump turns just fine, I primed it for about 5 mins and it was holding 50 psi the whole time. I dropped the pan, took the pump off and cleaned/inspected it. I pulled the main caps one by one and they all look great. No signs of excessive heat damage. I also checked the # 1&2 rod bearing and they looked fine so I buttoned it back up( I know I didn't check all the rod bearings but after what I saw and the fact that the rod bearings furthest from the pump looked fine, I decided the others were most likely fine as well). It only ran, at max, 20 seconds after the pump failed. It was a late night for sure. But as always, one problem leads to another. Now I've got no spark. I appreciate the help everyone. I'm gona grab my ohmmeter and start this new headache.
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That is good news! I still stand by something locking the pump down. Would be real easy for whatever it was to become dislodged when the pump rebounded when the shaft broke. Did you disassemble the pump? I tell you what. A new pump would NOT be a stupid thing to do here, IMO. Obviously a new hardened shaft, too. But replacing the pump would be smart insurance.
 
I was going to replace the pump originally but I soaked it in diesel first to clean any debris and everything looked great so I reinstalled it. There were a few pieces of silicone on the pick up screen so I was thinking that was the cause. I cleaned the pan and changed the oil. It doesn't take much to turn that pump so I just gorilla glued the broken piece of the shaft back on. That stuff is stronger than many of my welds haha.






(Just kidding about the glue lol. The new shaft is already installed)
 
If you used the same pump without taking it apart and inspecting it at the very LEAST, that was a mistake, IMO.
 
And the pick-up needs to be rodded out, from the pump end. If the pump was damaged by a foreign object, it would show up on the lobes. If the evidence is there, and the object is not, then it has to be in the tube.Unless its on the discharge side. If the lobes are damaged, you have to find the foreign object. If the pump is not damaged, you have to ask why is it not? I would then,respectfully, point to a crappy shaft.To not find the source of the failure is to risk having it happen again.
How many times do you want to risk your engine?
 
slimjim said:
Yeah the pump turns just fine, I primed it for about 5 mins and it was holding 50 psi the whole time. But as always, one problem leads to another. Now I've got no spark. I appreciate the help everyone. I'm gona grab my ohmmeter and start this new headache.
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take the priming rod out and reinstall the distributor


:D

(in my head that was followed by Gordon Shumway saying: HA!)
 
I did take apart the pump after soaking it in the diesel and it looked just fine. No sign of any objects inside the pump. The small piece of silicone were too big to fit through the pick up screen. I was able to work out the spark issue and I drove it about 5 miles today. Everything is working as it should. Oil pressure is holding at 20 psi/idle and it increases with RPM.
 
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