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No oil pressure

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Meljones

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Changed oil filters old gasket stayed didn't see it put new filter on and had oil blow out cleaned ghoul up replaced the filter filled oil started the motor on idle The motor runs but the Gage shows no oil pressure went back to filter removed no oil in filter motor still turns over and pumps water help!!
 
Seems like the oil pump has lost its prime. What motor and how many hours? What oil viscosity? On your oil changes, fill the filter with oil first, as a good practice.
 
Thanks Dave 2004 crusader 350 captains choice 15w40 what's the easiest way to prime I have acces to the oil lines back to the pmp
 
If the engine has actually run with full oil and not primed, I would remove the distributor, and insert a "distributor drive oil primer". It will use a hand drill for power, they are pretty cheap. This way, you can at least run the oil pump for some time without wearing out the engine in the meanwhile. If that doesn't work, the engine will need to come out and the pan dropped to see what is going on.
 
If your only choice left is to pull the motor, you may want to try temporarily rigging an oil filter bypass kit to pressurize the system...here is a kit from Jegs
http://www.jegs.com/i/Derale/259/25728/10002/-1?CT=999
It might take some plumbing tricks but it would sure be easier than the alternative....a hand operated oil change suction pump might be all you need to do the priming...not sure if connecting it to the suction side or the pressure side would be the best but I think it might work...you could try it both ways.
 
It seems odd that this would occur at the same time of the double filter gasket issue.
The two would appear to be non-related, IMO.

Meljones said:
The crusader motor is electronic it has. No distributor what know please help the boss is starting to worry
Click to expand...
This engine will still have a Camshaft driven oil pump system.
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The SBC oil pump is a Positive Displacement pump, using twin counter rotating gears.
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They rarely completely fail...... even when well used.
Given the distance from the oil (elevation) they rarely fail to prime.... much less, loose a prime.

Possible causes of failure:

Oil level lower than pick up tube screen.
Pick up tube has become dislodged from the pump body.
Collapse of by-pass/pressure control valve spring.
Pump's drive gear shaft broken/sheared.
Camshaft Drive system shaft broken/sheared.


I would also recommend removing the pump drive unit, and use the primer tool and electric drill motor.
This will rotate CW for either Std LH or Rev RH rotation engines.




Side note for anyone who would be doing this on a conventional SBC ignition system, I would recommend that you bring the crankshaft around to #1 TDC on Comp Stroke before removing the distributor....... perhaps even punch the distributor hold down flange and engine block.
This will help you during initial re-indexing...... followed by re-setting timing.
 
"2004 crusader 350 captains choice " - not a real accurate description of what you have.

The distributorless vortecs require what is called a "pre-luber" to properly prime their gallies. Very rare that they loose their prime. May want to disable the ignition and pull the plugs and try spinning the engine over, w/o any significant load, to see if pressure is restored. The pumps will usually start to develop pressure within 10 seconds, when new.

Also, would suggest a good mechanical gauge be used as your yardstick until you can verify what the gauge on the dash does.
 
That must have been quite the mess to have emptied so much oil that the pump lost it's prime! Not quite convinced just yet.
 
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